How to monitor the full range of CPU performance events

Modern CPUs contain hardware counters that are able to monitor a wide range of events. A simple invocation of GNU/Linux perf (I wrote about them here ) stat tool for example uses this to give the following information::

perf stat -d md5sum *

       578.920753 task-clock                #    0.995 CPUs utilized          
              211 context-switches          #    0.000 M/sec                  
                4 CPU-migrations            #    0.000 M/sec                  
              212 page-faults               #    0.000 M/sec                  
    1,744,441,333 cycles                    #    3.013 GHz                     [20.22%]
    1,064,408,505 stalled-cycles-frontend   #   61.02% frontend cycles idle    [30.68%]
      104,014,063 stalled-cycles-backend    #    5.96% backend  cycles idle    [41.00%]
    2,401,954,846 instructions              #    1.38  insns per cycle        
                                            #    0.44  stalled cycles per insn [51.18%]
       14,519,547 branches                  #   25.080 M/sec                   [61.21%]
          109,768 branch-misses             #    0.76% of all branches         [61.48%]
      266,601,318 L1-dcache-loads           #  460.514 M/sec                   [50.90%]
       13,539,746 L1-dcache-load-misses     #    5.08% of all L1-dcache hits   [50.21%]
                0 LLC-loads                 #    0.000 M/sec                   [39.19%]
                0 LLC-load-misses           #    0.00% of all LL-cache hits    [ 9.63%]

      0.581869522 seconds time elapsed

showing lots of useful information like the number of times the level one cache was accessed for data (L1-dcache-loads) and the number of those access that resulted in a cache miss (L1-dcache-load-misses). Modern processors have however many more available counters and also there are a number of options that can be applied to each counter.

In order to make full use of these counters one currently has to specify them to the perf tools as a raw hexadecimal code (-e rXXXX where XXXX is the code). (Note added 2024-11-04: see also the perf list command ). This raises two obvious questions:

  • What codes to use?

  • What does all this information mean?

I’ll cover the second of these in later posts, but for time being here is how to figure out raw codes to use:

  1. Get the latest version of perfmon2/libpfm ( h/t this developerworks article ):
    git clone git://perfmon2.git.sourceforge.net/gitroot/perfmon2/libpfm4
    cd libpfm4
    make
    
  2. Run the showevtinfo program (in examples subdirectory) to get a list of all available events, and the masks and modifiers that are supported (see the output below for an example of the full output)
  3. Figure out what events and what with masks and modifiers you want to use. The masks are prefixed by Umask and are given as hexadecimal numbers and also symbolic names in the square brackets. The modifiers are prefixed by Modif and their names are also in square brackets.
  4. Use the check_events program (also in examples sub-directory) to convert the event, umask and modifiers into a raw code. You can do this by running the command as:

    check_events <event name>:<umask>[(:modifers)*]
    

    i.e., you supply the event name, the umask and multiple modifiers all separated by the colon character. The program will then print out, amongst other things, an raw event specification, for example:

     Codes          : 0x531003
    
  5. This hexadecimal code can be used as parameter to GNU.Linux perf tools, for example to perf stat by supplying it with -e r531003 option

That is it – the next step is interpreting the counters and adjusting your program to improve its performance!

Full output of showevtinfo

Here is the full output of the showevtinfo program on my laptop:

   Supported PMU models:
   	[7, netburst, "Pentium4"]
   	[8, netburst_p, "Pentium4 (Prescott)"]
   	[11, core, "Intel Core"]
   	[14, atom, "Intel Atom"]
   	[15, nhm, "Intel Nehalem"]
   	[16, nhm_ex, "Intel Nehalem EX"]
   	[17, nhm_unc, "Intel Nehalem uncore"]
   	[18, ix86arch, "Intel X86 architectural PMU"]
   	[51, perf, "perf_events generic PMU"]
   	[52, wsm, "Intel Westmere (single-socket)"]
   	[53, wsm_dp, "Intel Westmere DP"]
   	[54, wsm_unc, "Intel Westmere uncore"]
   	[55, amd64_k7, "AMD64 K7"]
   	[56, amd64_k8_revb, "AMD64 K8 RevB"]
   	[57, amd64_k8_revc, "AMD64 K8 RevC"]
   	[58, amd64_k8_revd, "AMD64 K8 RevD"]
   	[59, amd64_k8_reve, "AMD64 K8 RevE"]
   	[60, amd64_k8_revf, "AMD64 K8 RevF"]
   	[61, amd64_k8_revg, "AMD64 K8 RevG"]
   	[62, amd64_fam10h_barcelona, "AMD64 Fam10h Barcelona"]
   	[63, amd64_fam10h_shanghai, "AMD64 Fam10h Shanghai"]
   	[64, amd64_fam10h_istanbul, "AMD64 Fam10h Istanbul"]
   	[68, snb, "Intel Sandy Bridge"]
   	[69, amd64_fam14h_bobcat, "AMD64 Fam14h Bobcat"]
   	[70, amd64_fam15h_interlagos, "AMD64 Fam15h Interlagos"]
   	[71, snb_ep, "Intel Sandy Bridge EP"]
   	[72, amd64_fam12h_llano, "AMD64 Fam12h Llano"]
   	[73, amd64_fam11h_turion, "AMD64 Fam11h Turion"]
   	[74, ivb, "Intel Ivy Bridge"]
   Detected PMU models:
   	[18, ix86arch, "Intel X86 architectural PMU", 7 events, 1 max encoding, 7 counters, core PMU]
   	[51, perf, "perf_events generic PMU", 80 events, 1 max encoding, 0 counters, OS generic PMU]
   	[68, snb, "Intel Sandy Bridge", 79 events, 2 max encoding, 11 counters, core PMU]
   Total events: 2332 available, 166 supported
   #-----------------------------
   IDX	 : 37748736
   PMU name : ix86arch (Intel X86 architectural PMU)
   Name     : UNHALTED_CORE_CYCLES
   Equiv	 : None
   Flags    : None
   Desc     : count core clock cycles whenever the clock signal on the specific core is running (not halted)
   Code     : 0x3c
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 37748737
   PMU name : ix86arch (Intel X86 architectural PMU)
   Name     : INSTRUCTION_RETIRED
   Equiv	 : None
   Flags    : None
   Desc     : count the number of instructions at retirement. For instructions that consists of multiple micro-ops, this event counts the retirement of the last micro-op of the instruction
   Code     : 0xc0
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 37748738
   PMU name : ix86arch (Intel X86 architectural PMU)
   Name     : UNHALTED_REFERENCE_CYCLES
   Equiv	 : None
   Flags    : None
   Desc     : count reference clock cycles while the clock signal on the specific core is running. The reference clock operates at a fixed frequency, irrespective of core freqeuncy changes due to performance state transitions
   Code     : 0x13c
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 37748739
   PMU name : ix86arch (Intel X86 architectural PMU)
   Name     : LLC_REFERENCES
   Equiv	 : None
   Flags    : None
   Desc     : count each request originating from the core to reference a cache line in the last level cache. The count may include speculation, but excludes cache line fills due to hardware prefetch
   Code     : 0x4f2e
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 37748740
   PMU name : ix86arch (Intel X86 architectural PMU)
   Name     : LLC_MISSES
   Equiv	 : None
   Flags    : None
   Desc     : count each cache miss condition for references to the last level cache. The event count may include speculation, but excludes cache line fills due to hardware prefetch
   Code     : 0x412e
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 37748741
   PMU name : ix86arch (Intel X86 architectural PMU)
   Name     : BRANCH_INSTRUCTIONS_RETIRED
   Equiv	 : None
   Flags    : None
   Desc     : count branch instructions at retirement. Specifically, this event counts the retirement of the last micro-op of a branch instruction
   Code     : 0xc4
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 37748742
   PMU name : ix86arch (Intel X86 architectural PMU)
   Name     : MISPREDICTED_BRANCH_RETIRED
   Equiv	 : None
   Flags    : None
   Desc     : count mispredicted branch instructions at retirement. Specifically, this event counts at retirement of the last micro-op of a branch instruction in the architectural path of the execution and experienced misprediction in the branch prediction hardware
   Code     : 0xc5
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 106954752
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_CPU_CYCLES
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_HW_CPU_CYCLES
   Code     : 0x0
   #-----------------------------
   IDX	 : 106954753
   PMU name : perf (perf_events generic PMU)
   Name     : CYCLES
   Equiv	 : PERF_COUNT_HW_CPU_CYCLES
   Flags    : None
   Desc     : PERF_COUNT_HW_CPU_CYCLES
   Code     : 0x0
   #-----------------------------
   IDX	 : 106954754
   PMU name : perf (perf_events generic PMU)
   Name     : CPU-CYCLES
   Equiv	 : PERF_COUNT_HW_CPU_CYCLES
   Flags    : None
   Desc     : PERF_COUNT_HW_CPU_CYCLES
   Code     : 0x0
   #-----------------------------
   IDX	 : 106954755
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_INSTRUCTIONS
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_HW_INSTRUCTIONS
   Code     : 0x1
   #-----------------------------
   IDX	 : 106954756
   PMU name : perf (perf_events generic PMU)
   Name     : INSTRUCTIONS
   Equiv	 : PERF_COUNT_HW_INSTRUCTIONS
   Flags    : None
   Desc     : PERF_COUNT_HW_INSTRUCTIONS
   Code     : 0x1
   #-----------------------------
   IDX	 : 106954757
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_CACHE_REFERENCES
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_HW_CACHE_REFERENCES
   Code     : 0x2
   #-----------------------------
   IDX	 : 106954758
   PMU name : perf (perf_events generic PMU)
   Name     : CACHE-REFERENCES
   Equiv	 : PERF_COUNT_HW_CACHE_REFERENCES
   Flags    : None
   Desc     : PERF_COUNT_HW_CACHE_REFERENCES
   Code     : 0x2
   #-----------------------------
   IDX	 : 106954759
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_CACHE_MISSES
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_HW_CACHE_MISSES
   Code     : 0x3
   #-----------------------------
   IDX	 : 106954760
   PMU name : perf (perf_events generic PMU)
   Name     : CACHE-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_MISSES
   Flags    : None
   Desc     : PERF_COUNT_HW_CACHE_MISSES
   Code     : 0x3
   #-----------------------------
   IDX	 : 106954761
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_BRANCH_INSTRUCTIONS
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_HW_BRANCH_INSTRUCTIONS
   Code     : 0x4
   #-----------------------------
   IDX	 : 106954762
   PMU name : perf (perf_events generic PMU)
   Name     : BRANCH-INSTRUCTIONS
   Equiv	 : PERF_COUNT_HW_BRANCH_INSTRUCTIONS
   Flags    : None
   Desc     : PERF_COUNT_HW_BRANCH_INSTRUCTIONS
   Code     : 0x4
   #-----------------------------
   IDX	 : 106954763
   PMU name : perf (perf_events generic PMU)
   Name     : BRANCHES
   Equiv	 : PERF_COUNT_HW_BRANCH_INSTRUCTIONS
   Flags    : None
   Desc     : PERF_COUNT_HW_BRANCH_INSTRUCTIONS
   Code     : 0x4
   #-----------------------------
   IDX	 : 106954764
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_BRANCH_MISSES
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_HW_BRANCH_MISSES
   Code     : 0x5
   #-----------------------------
   IDX	 : 106954765
   PMU name : perf (perf_events generic PMU)
   Name     : BRANCH-MISSES
   Equiv	 : PERF_COUNT_HW_BRANCH_MISSES
   Flags    : None
   Desc     : PERF_COUNT_HW_BRANCH_MISSES
   Code     : 0x5
   #-----------------------------
   IDX	 : 106954766
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_BUS_CYCLES
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_HW_BUS_CYCLES
   Code     : 0x6
   #-----------------------------
   IDX	 : 106954767
   PMU name : perf (perf_events generic PMU)
   Name     : BUS-CYCLES
   Equiv	 : PERF_COUNT_HW_BUS_CYCLES
   Flags    : None
   Desc     : PERF_COUNT_HW_BUS_CYCLES
   Code     : 0x6
   #-----------------------------
   IDX	 : 106954768
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
   Code     : 0x7
   #-----------------------------
   IDX	 : 106954769
   PMU name : perf (perf_events generic PMU)
   Name     : STALLED-CYCLES-FRONTEND
   Equiv	 : PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
   Flags    : None
   Desc     : PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
   Code     : 0x7
   #-----------------------------
   IDX	 : 106954770
   PMU name : perf (perf_events generic PMU)
   Name     : IDLE-CYCLES-FRONTEND
   Equiv	 : PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
   Flags    : None
   Desc     : PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
   Code     : 0x7
   #-----------------------------
   IDX	 : 106954771
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_STALLED_CYCLES_BACKEND
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_HW_STALLED_CYCLES_BACKEND
   Code     : 0x8
   #-----------------------------
   IDX	 : 106954772
   PMU name : perf (perf_events generic PMU)
   Name     : STALLED-CYCLES-BACKEND
   Equiv	 : PERF_COUNT_HW_STALLED_CYCLES_BACKEND
   Flags    : None
   Desc     : PERF_COUNT_HW_STALLED_CYCLES_BACKEND
   Code     : 0x8
   #-----------------------------
   IDX	 : 106954773
   PMU name : perf (perf_events generic PMU)
   Name     : IDLE-CYCLES-BACKEND
   Equiv	 : PERF_COUNT_HW_STALLED_CYCLES_BACKEND
   Flags    : None
   Desc     : PERF_COUNT_HW_STALLED_CYCLES_BACKEND
   Code     : 0x8
   #-----------------------------
   IDX	 : 106954774
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_REF_CPU_CYCLES
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_HW_REF_CPU_CYCLES
   Code     : 0x9
   #-----------------------------
   IDX	 : 106954775
   PMU name : perf (perf_events generic PMU)
   Name     : REF-CYCLES
   Equiv	 : PERF_COUNT_HW_REF_CPU_CYCLES
   Flags    : None
   Desc     : PERF_COUNT_HW_REF_CPU_CYCLES
   Code     : 0x9
   #-----------------------------
   IDX	 : 106954776
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_SW_CPU_CLOCK
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_SW_CPU_CLOCK
   Code     : 0x0
   #-----------------------------
   IDX	 : 106954777
   PMU name : perf (perf_events generic PMU)
   Name     : CPU-CLOCK
   Equiv	 : PERF_COUNT_SW_CPU_CLOCK
   Flags    : None
   Desc     : PERF_COUNT_SW_CPU_CLOCK
   Code     : 0x0
   #-----------------------------
   IDX	 : 106954778
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_SW_TASK_CLOCK
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_SW_TASK_CLOCK
   Code     : 0x1
   #-----------------------------
   IDX	 : 106954779
   PMU name : perf (perf_events generic PMU)
   Name     : TASK-CLOCK
   Equiv	 : PERF_COUNT_SW_TASK_CLOCK
   Flags    : None
   Desc     : PERF_COUNT_SW_TASK_CLOCK
   Code     : 0x1
   #-----------------------------
   IDX	 : 106954780
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_SW_PAGE_FAULTS
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_SW_PAGE_FAULTS
   Code     : 0x2
   #-----------------------------
   IDX	 : 106954781
   PMU name : perf (perf_events generic PMU)
   Name     : PAGE-FAULTS
   Equiv	 : PERF_COUNT_SW_PAGE_FAULTS
   Flags    : None
   Desc     : PERF_COUNT_SW_PAGE_FAULTS
   Code     : 0x2
   #-----------------------------
   IDX	 : 106954782
   PMU name : perf (perf_events generic PMU)
   Name     : FAULTS
   Equiv	 : PERF_COUNT_SW_PAGE_FAULTS
   Flags    : None
   Desc     : PERF_COUNT_SW_PAGE_FAULTS
   Code     : 0x2
   #-----------------------------
   IDX	 : 106954783
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_SW_CONTEXT_SWITCHES
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_SW_CONTEXT_SWITCHES
   Code     : 0x3
   #-----------------------------
   IDX	 : 106954784
   PMU name : perf (perf_events generic PMU)
   Name     : CONTEXT-SWITCHES
   Equiv	 : PERF_COUNT_SW_CONTEXT_SWITCHES
   Flags    : None
   Desc     : PERF_COUNT_SW_CONTEXT_SWITCHES
   Code     : 0x3
   #-----------------------------
   IDX	 : 106954785
   PMU name : perf (perf_events generic PMU)
   Name     : CS
   Equiv	 : PERF_COUNT_SW_CONTEXT_SWITCHES
   Flags    : None
   Desc     : PERF_COUNT_SW_CONTEXT_SWITCHES
   Code     : 0x3
   #-----------------------------
   IDX	 : 106954786
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_SW_CPU_MIGRATIONS
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_SW_CPU_MIGRATIONS
   Code     : 0x4
   #-----------------------------
   IDX	 : 106954787
   PMU name : perf (perf_events generic PMU)
   Name     : CPU-MIGRATIONS
   Equiv	 : PERF_COUNT_SW_CPU_MIGRATIONS
   Flags    : None
   Desc     : PERF_COUNT_SW_CPU_MIGRATIONS
   Code     : 0x4
   #-----------------------------
   IDX	 : 106954788
   PMU name : perf (perf_events generic PMU)
   Name     : MIGRATIONS
   Equiv	 : PERF_COUNT_SW_CPU_MIGRATIONS
   Flags    : None
   Desc     : PERF_COUNT_SW_CPU_MIGRATIONS
   Code     : 0x4
   #-----------------------------
   IDX	 : 106954789
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_SW_PAGE_FAULTS_MIN
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_SW_PAGE_FAULTS_MIN
   Code     : 0x5
   #-----------------------------
   IDX	 : 106954790
   PMU name : perf (perf_events generic PMU)
   Name     : MINOR-FAULTS
   Equiv	 : PERF_COUNT_SW_PAGE_FAULTS_MIN
   Flags    : None
   Desc     : PERF_COUNT_SW_PAGE_FAULTS_MIN
   Code     : 0x5
   #-----------------------------
   IDX	 : 106954791
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_SW_PAGE_FAULTS_MAJ
   Equiv	 : None
   Flags    : None
   Desc     : PERF_COUNT_SW_PAGE_FAULTS_MAJ
   Code     : 0x6
   #-----------------------------
   IDX	 : 106954792
   PMU name : perf (perf_events generic PMU)
   Name     : MAJOR-FAULTS
   Equiv	 : PERF_COUNT_SW_PAGE_FAULTS_MAJ
   Flags    : None
   Desc     : PERF_COUNT_SW_PAGE_FAULTS_MAJ
   Code     : 0x6
   #-----------------------------
   IDX	 : 106954793
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_CACHE_L1D
   Equiv	 : None
   Flags    : None
   Desc     : L1 data cache
   Code     : 0x0
   Umask-00 : 0x00 : PMU : [READ] : None : read access
   Umask-01 : 0x100 : PMU : [WRITE] : None : write access
   Umask-02 : 0x200 : PMU : [PREFETCH] : None : prefetch access
   Umask-03 : 0x00 : PMU : [ACCESS] : None : hit access
   Umask-04 : 0x10000 : PMU : [MISS] : None : miss access
   #-----------------------------
   IDX	 : 106954794
   PMU name : perf (perf_events generic PMU)
   Name     : L1-DCACHE-LOADS
   Equiv	 : PERF_COUNT_HW_CACHE_L1D:READ:ACCESS
   Flags    : None
   Desc     : L1 cache load accesses
   Code     : 0x0
   #-----------------------------
   IDX	 : 106954795
   PMU name : perf (perf_events generic PMU)
   Name     : L1-DCACHE-LOAD-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_L1D:READ:MISS
   Flags    : None
   Desc     : L1 cache load misses
   Code     : 0x0
   #-----------------------------
   IDX	 : 106954796
   PMU name : perf (perf_events generic PMU)
   Name     : L1-DCACHE-STORES
   Equiv	 : PERF_COUNT_HW_CACHE_L1D:WRITE:ACCESS
   Flags    : None
   Desc     : L1 cache store accesses
   Code     : 0x0
   #-----------------------------
   IDX	 : 106954797
   PMU name : perf (perf_events generic PMU)
   Name     : L1-DCACHE-STORE-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_L1D:WRITE:MISS
   Flags    : None
   Desc     : L1 cache store misses
   Code     : 0x0
   #-----------------------------
   IDX	 : 106954798
   PMU name : perf (perf_events generic PMU)
   Name     : L1-DCACHE-PREFETCHES
   Equiv	 : PERF_COUNT_HW_CACHE_L1D:PREFETCH:ACCESS
   Flags    : None
   Desc     : L1 cache prefetch accesses
   Code     : 0x0
   #-----------------------------
   IDX	 : 106954799
   PMU name : perf (perf_events generic PMU)
   Name     : L1-DCACHE-PREFETCH-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_L1D:PREFETCH:MISS
   Flags    : None
   Desc     : L1 cache prefetch misses
   Code     : 0x0
   #-----------------------------
   IDX	 : 106954800
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_CACHE_L1I
   Equiv	 : None
   Flags    : None
   Desc     : L1 instruction cache
   Code     : 0x1
   Umask-00 : 0x00 : PMU : [READ] : None : read access
   Umask-01 : 0x200 : PMU : [PREFETCH] : None : prefetch access
   Umask-02 : 0x00 : PMU : [ACCESS] : None : hit access
   Umask-03 : 0x10000 : PMU : [MISS] : None : miss access
   #-----------------------------
   IDX	 : 106954801
   PMU name : perf (perf_events generic PMU)
   Name     : L1-ICACHE-LOADS
   Equiv	 : PERF_COUNT_HW_CACHE_L1I:READ:ACCESS
   Flags    : None
   Desc     : L1I cache load accesses
   Code     : 0x1
   #-----------------------------
   IDX	 : 106954802
   PMU name : perf (perf_events generic PMU)
   Name     : L1-ICACHE-LOAD-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_L1I:READ:MISS
   Flags    : None
   Desc     : L1I cache load misses
   Code     : 0x1
   #-----------------------------
   IDX	 : 106954803
   PMU name : perf (perf_events generic PMU)
   Name     : L1-ICACHE-PREFETCHES
   Equiv	 : PERF_COUNT_HW_CACHE_L1I:PREFETCH:ACCESS
   Flags    : None
   Desc     : L1I cache prefetch accesses
   Code     : 0x1
   #-----------------------------
   IDX	 : 106954804
   PMU name : perf (perf_events generic PMU)
   Name     : L1-ICACHE-PREFETCH-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_L1I:PREFETCH:MISS
   Flags    : None
   Desc     : L1I cache prefetch misses
   Code     : 0x1
   #-----------------------------
   IDX	 : 106954805
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_CACHE_LL
   Equiv	 : None
   Flags    : None
   Desc     : Last level cache
   Code     : 0x2
   Umask-00 : 0x00 : PMU : [READ] : None : read access
   Umask-01 : 0x100 : PMU : [WRITE] : None : write access
   Umask-02 : 0x200 : PMU : [PREFETCH] : None : prefetch access
   Umask-03 : 0x00 : PMU : [ACCESS] : None : hit access
   Umask-04 : 0x10000 : PMU : [MISS] : None : miss access
   #-----------------------------
   IDX	 : 106954806
   PMU name : perf (perf_events generic PMU)
   Name     : LLC-LOADS
   Equiv	 : PERF_COUNT_HW_CACHE_LL:READ:ACCESS
   Flags    : None
   Desc     : Last level cache load accesses
   Code     : 0x2
   #-----------------------------
   IDX	 : 106954807
   PMU name : perf (perf_events generic PMU)
   Name     : LLC-LOAD-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_LL:READ:MISS
   Flags    : None
   Desc     : Last level cache load misses
   Code     : 0x2
   #-----------------------------
   IDX	 : 106954808
   PMU name : perf (perf_events generic PMU)
   Name     : LLC-STORES
   Equiv	 : PERF_COUNT_HW_CACHE_LL:WRITE:ACCESS
   Flags    : None
   Desc     : Last level cache store accesses
   Code     : 0x2
   #-----------------------------
   IDX	 : 106954809
   PMU name : perf (perf_events generic PMU)
   Name     : LLC-STORE-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_LL:WRITE:MISS
   Flags    : None
   Desc     : Last level cache store misses
   Code     : 0x2
   #-----------------------------
   IDX	 : 106954810
   PMU name : perf (perf_events generic PMU)
   Name     : LLC-PREFETCHES
   Equiv	 : PERF_COUNT_HW_CACHE_LL:PREFETCH:ACCESS
   Flags    : None
   Desc     : Last level cache prefetch accesses
   Code     : 0x2
   #-----------------------------
   IDX	 : 106954811
   PMU name : perf (perf_events generic PMU)
   Name     : LLC-PREFETCH-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_LL:PREFETCH:MISS
   Flags    : None
   Desc     : Last level cache prefetch misses
   Code     : 0x2
   #-----------------------------
   IDX	 : 106954812
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_CACHE_DTLB
   Equiv	 : None
   Flags    : None
   Desc     : Data Translation Lookaside Buffer
   Code     : 0x3
   Umask-00 : 0x00 : PMU : [READ] : None : read access
   Umask-01 : 0x100 : PMU : [WRITE] : None : write access
   Umask-02 : 0x200 : PMU : [PREFETCH] : None : prefetch access
   Umask-03 : 0x00 : PMU : [ACCESS] : None : hit access
   Umask-04 : 0x10000 : PMU : [MISS] : None : miss access
   #-----------------------------
   IDX	 : 106954813
   PMU name : perf (perf_events generic PMU)
   Name     : DTLB-LOADS
   Equiv	 : PERF_COUNT_HW_CACHE_DTLB:READ:ACCESS
   Flags    : None
   Desc     : Data TLB load accesses
   Code     : 0x3
   #-----------------------------
   IDX	 : 106954814
   PMU name : perf (perf_events generic PMU)
   Name     : DTLB-LOAD-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_DTLB:READ:MISS
   Flags    : None
   Desc     : Data TLB load misses
   Code     : 0x3
   #-----------------------------
   IDX	 : 106954815
   PMU name : perf (perf_events generic PMU)
   Name     : DTLB-STORES
   Equiv	 : PERF_COUNT_HW_CACHE_DTLB:WRITE:ACCESS
   Flags    : None
   Desc     : Data TLB store accesses
   Code     : 0x3
   #-----------------------------
   IDX	 : 106954816
   PMU name : perf (perf_events generic PMU)
   Name     : DTLB-STORE-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_DTLB:WRITE:MISS
   Flags    : None
   Desc     : Data TLB store misses
   Code     : 0x3
   #-----------------------------
   IDX	 : 106954817
   PMU name : perf (perf_events generic PMU)
   Name     : DTLB-PREFETCHES
   Equiv	 : PERF_COUNT_HW_CACHE_DTLB:PREFETCH:ACCESS
   Flags    : None
   Desc     : Data TLB prefetch accesses
   Code     : 0x3
   #-----------------------------
   IDX	 : 106954818
   PMU name : perf (perf_events generic PMU)
   Name     : DTLB-PREFETCH-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_DTLB:PREFETCH:MISS
   Flags    : None
   Desc     : Data TLB prefetch misses
   Code     : 0x3
   #-----------------------------
   IDX	 : 106954819
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_CACHE_ITLB
   Equiv	 : None
   Flags    : None
   Desc     : Instruction Translation Lookaside Buffer
   Code     : 0x4
   Umask-00 : 0x00 : PMU : [READ] : None : read access
   Umask-01 : 0x00 : PMU : [ACCESS] : None : hit access
   Umask-02 : 0x10000 : PMU : [MISS] : None : miss access
   #-----------------------------
   IDX	 : 106954820
   PMU name : perf (perf_events generic PMU)
   Name     : ITLB-LOADS
   Equiv	 : PERF_COUNT_HW_CACHE_ITLB:READ:ACCESS
   Flags    : None
   Desc     : Instruction TLB load accesses
   Code     : 0x4
   #-----------------------------
   IDX	 : 106954821
   PMU name : perf (perf_events generic PMU)
   Name     : ITLB-LOAD-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_ITLB:READ:MISS
   Flags    : None
   Desc     : Instruction TLB load misses
   Code     : 0x4
   #-----------------------------
   IDX	 : 106954822
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_CACHE_BPU
   Equiv	 : None
   Flags    : None
   Desc     : Branch Prediction Unit
   Code     : 0x5
   Umask-00 : 0x00 : PMU : [READ] : None : read access
   Umask-01 : 0x00 : PMU : [ACCESS] : None : hit access
   Umask-02 : 0x10000 : PMU : [MISS] : None : miss access
   #-----------------------------
   IDX	 : 106954823
   PMU name : perf (perf_events generic PMU)
   Name     : BRANCH-LOADS
   Equiv	 : PERF_COUNT_HW_CACHE_BPU:READ:ACCESS
   Flags    : None
   Desc     : Branch  load accesses
   Code     : 0x5
   #-----------------------------
   IDX	 : 106954824
   PMU name : perf (perf_events generic PMU)
   Name     : BRANCH-LOAD-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_BPU:READ:MISS
   Flags    : None
   Desc     : Branch  load misses
   Code     : 0x5
   #-----------------------------
   IDX	 : 106954825
   PMU name : perf (perf_events generic PMU)
   Name     : PERF_COUNT_HW_CACHE_NODE
   Equiv	 : None
   Flags    : None
   Desc     : Node memory access
   Code     : 0x6
   Umask-00 : 0x00 : PMU : [READ] : None : read access
   Umask-01 : 0x100 : PMU : [WRITE] : None : write access
   Umask-02 : 0x200 : PMU : [PREFETCH] : None : prefetch access
   Umask-03 : 0x00 : PMU : [ACCESS] : None : hit access
   Umask-04 : 0x10000 : PMU : [MISS] : None : miss access
   #-----------------------------
   IDX	 : 106954826
   PMU name : perf (perf_events generic PMU)
   Name     : NODE-LOADS
   Equiv	 : PERF_COUNT_HW_CACHE_NODE:READ:ACCESS
   Flags    : None
   Desc     : Node  load accesses
   Code     : 0x6
   #-----------------------------
   IDX	 : 106954827
   PMU name : perf (perf_events generic PMU)
   Name     : NODE-LOAD-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_NODE:READ:MISS
   Flags    : None
   Desc     : Node  load misses
   Code     : 0x6
   #-----------------------------
   IDX	 : 106954828
   PMU name : perf (perf_events generic PMU)
   Name     : NODE-STORES
   Equiv	 : PERF_COUNT_HW_CACHE_NODE:WRITE:ACCESS
   Flags    : None
   Desc     : Node  store accesses
   Code     : 0x6
   #-----------------------------
   IDX	 : 106954829
   PMU name : perf (perf_events generic PMU)
   Name     : NODE-STORE-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_NODE:WRITE:MISS
   Flags    : None
   Desc     : Node  store misses
   Code     : 0x6
   #-----------------------------
   IDX	 : 106954830
   PMU name : perf (perf_events generic PMU)
   Name     : NODE-PREFETCHES
   Equiv	 : PERF_COUNT_HW_CACHE_NODE:PREFETCH:ACCESS
   Flags    : None
   Desc     : Node  prefetch accesses
   Code     : 0x6
   #-----------------------------
   IDX	 : 106954831
   PMU name : perf (perf_events generic PMU)
   Name     : NODE-PREFETCH-MISSES
   Equiv	 : PERF_COUNT_HW_CACHE_NODE:PREFETCH:MISS
   Flags    : None
   Desc     : Node  prefetch misses
   Code     : 0x6
   #-----------------------------
   IDX	 : 142606336
   PMU name : snb (Intel Sandy Bridge)
   Name     : AGU_BYPASS_CANCEL
   Equiv	 : None
   Flags    : None
   Desc     : Number of executed load operations with all the following traits: 1. addressing of the format [base + offset], 2. the offset is between 1 and 2047, 3. the address specified in the base register is in one page and the address [base+offset] is in another page
   Code     : 0xb6
   Umask-00 : 0x01 : PMU : [COUNT] : [default] : This event counts executed load operations
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606337
   PMU name : snb (Intel Sandy Bridge)
   Name     : ARITH
   Equiv	 : None
   Flags    : None
   Desc     : Counts arithmetic multiply operations
   Code     : 0x14
   Umask-00 : 0x01 : PMU : [FPU_DIV_ACTIVE] : None : Cycles that the divider is active, includes integer and floating point
   Umask-01 : 0x10401 : PMU : [FPU_DIV] : None : Alias to FPU_DIV_ACTIVE:c=1:e=1
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606338
   PMU name : snb (Intel Sandy Bridge)
   Name     : BACLEARS
   Equiv	 : None
   Flags    : None
   Desc     : Branch resteered
   Code     : 0xe6
   Umask-00 : 0x1f : PMU : [ANY] : [default] : Counts the number of times the front end is resteered, mainly when the BPU cannot provide a correct prediction and this is corrected by other branch handling mechanisms at the front end
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606339
   PMU name : snb (Intel Sandy Bridge)
   Name     : BR_INST_EXEC
   Equiv	 : None
   Flags    : None
   Desc     : Branch instructions executed
   Code     : 0x88
   Umask-00 : 0x41 : PMU : [NONTAKEN_COND] : None : All macro conditional non-taken branch instructions
   Umask-01 : 0x81 : PMU : [TAKEN_COND] : None : All macro conditional taken branch instructions
   Umask-02 : 0x42 : PMU : [NONTAKEN_DIRECT_JUMP] : None : All macro unconditional non-taken branch instructions, excluding calls and indirects
   Umask-03 : 0x82 : PMU : [TAKEN_DIRECT_JUMP] : None : All macro unconditional taken branch instructions, excluding calls and indirects
   Umask-04 : 0x44 : PMU : [NONTAKEN_INDIRECT_JUMP_NON_CALL_RET] : None : All non-taken indirect branches that are not calls nor returns
   Umask-05 : 0x84 : PMU : [TAKEN_INDIRECT_JUMP_NON_CALL_RET] : None : All taken indirect branches that are not calls nor returns
   Umask-06 : 0x88 : PMU : [TAKEN_RETURN_NEAR] : None : All taken indirect branches that have a return mnemonic
   Umask-07 : 0x90 : PMU : [TAKEN_DIRECT_NEAR_CALL] : None : All taken non-indirect calls
   Umask-08 : 0xa0 : PMU : [TAKEN_INDIRECT_NEAR_CALL] : None : All taken indirect calls, including both register and memory indirect
   Umask-09 : 0xff : PMU : [ALL_BRANCHES] : [default] : All near executed branches instructions (not necessarily retired)
   Umask-10 : 0xc1 : PMU : [ALL_CONDITIONAL] : None : All macro conditional branch instructions
   Umask-11 : 0xc1 : PMU : [ANY_COND] : None : Alias to ALL_CONDITIONAL
   Umask-12 : 0xc4 : PMU : [ANY_INDIRECT_JUMP_NON_CALL_RET] : None : All indirect branches that are not calls nor returns
   Umask-13 : 0xd0 : PMU : [ANY_DIRECT_NEAR_CALL] : None : All non-indirect calls
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606340
   PMU name : snb (Intel Sandy Bridge)
   Name     : BR_INST_RETIRED
   Equiv	 : None
   Flags    : [precise] 
   Desc     : Retired branch instructions
   Code     : 0xc4
   Umask-00 : 0x04 : PMU : [ALL_BRANCHES] : [default] [precise] : All taken and not taken macro branches including far branches (Precise Event)
   Umask-01 : 0x01 : PMU : [CONDITIONAL] : [precise] : All taken and not taken macro conditional branch instructions (Precise Event)
   Umask-02 : 0x40 : PMU : [FAR_BRANCH] : [precise] : Number of far branch instructions retired (Precise Event)
   Umask-03 : 0x02 : PMU : [NEAR_CALL] : [precise] : All macro direct and indirect near calls, does not count far calls (Precise Event)
   Umask-04 : 0x08 : PMU : [NEAR_RETURN] : [precise] : Number of near ret instructions retired (Precise Event)
   Umask-05 : 0x20 : PMU : [NEAR_TAKEN] : [precise] : Number of near branch taken instructions retired (Precise Event)
   Umask-06 : 0x10 : PMU : [NOT_TAKEN] : [precise] : All not taken macro branch instructions retired (Precise Event)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606341
   PMU name : snb (Intel Sandy Bridge)
   Name     : BR_MISP_EXEC
   Equiv	 : None
   Flags    : None
   Desc     : Mispredicted branches executed
   Code     : 0x89
   Umask-00 : 0x41 : PMU : [NONTAKEN_COND] : None : All non-taken mispredicted macro conditional branch instructions
   Umask-01 : 0x81 : PMU : [TAKEN_COND] : None : All taken mispredicted macro conditional branch instructions
   Umask-02 : 0x44 : PMU : [NONTAKEN_INDIRECT_JUMP_NON_CALL_RET] : None : All non-taken mispredicted indirect branches that are not calls nor returns
   Umask-03 : 0x84 : PMU : [TAKEN_INDIRECT_JUMP_NON_CALL_RET] : None : All taken mispredicted indirect branches that are not calls nor returns
   Umask-04 : 0x48 : PMU : [NONTAKEN_RETURN_NEAR] : None : All non-taken mispredicted indirect branches that have a return mnemonic
   Umask-05 : 0x88 : PMU : [TAKEN_RETURN_NEAR] : None : All taken mispredicted indirect branches that have a return mnemonic
   Umask-06 : 0x50 : PMU : [NONTAKEN_DIRECT_NEAR_CALL] : None : All non-taken mispredicted non-indirect calls
   Umask-07 : 0x90 : PMU : [TAKEN_DIRECT_NEAR_CALL] : None : All taken mispredicted non-indirect calls
   Umask-08 : 0x60 : PMU : [NONTAKEN_INDIRECT_NEAR_CALL] : None : All nontaken mispredicted indirect calls, including both register and memory indirect
   Umask-09 : 0xa0 : PMU : [TAKEN_INDIRECT_NEAR_CALL] : None : All taken mispredicted indirect calls, including both register and memory indirect
   Umask-10 : 0xc1 : PMU : [ANY_COND] : None : All mispredicted macro conditional branch instructions
   Umask-11 : 0xc8 : PMU : [ANY_RETURN_NEAR] : None : All mispredicted indirect branches that have a return mnemonic
   Umask-12 : 0xd0 : PMU : [ANY_DIRECT_NEAR_CALL] : None : All mispredicted non-indirect calls
   Umask-13 : 0xc4 : PMU : [ANY_INDIRECT_JUMP_NON_CALL_RET] : None : All mispredicted indirect branches that are not calls nor returns
   Umask-14 : 0xff : PMU : [ALL_BRANCHES] : [default] : All mispredicted branch instructions
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606342
   PMU name : snb (Intel Sandy Bridge)
   Name     : BR_MISP_RETIRED
   Equiv	 : None
   Flags    : [precise] 
   Desc     : Mispredicted retired branches
   Code     : 0xc5
   Umask-00 : 0x04 : PMU : [ALL_BRANCHES] : [default] [precise] : All mispredicted macro branches (Precise Event)
   Umask-01 : 0x01 : PMU : [CONDITIONAL] : [precise] : All mispredicted macro conditional branch instructions (Precise Event)
   Umask-02 : 0x02 : PMU : [NEAR_CALL] : [precise] : All macro direct and indirect near calls (Precise Event)
   Umask-03 : 0x10 : PMU : [NOT_TAKEN] : [precise] : Number of branch instructions retired that were mispredicted and not-taken (Precise Event)
   Umask-04 : 0x20 : PMU : [TAKEN] : [precise] : Number of branch instructions retired that were mispredicted and taken (Precise Event)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606343
   PMU name : snb (Intel Sandy Bridge)
   Name     : BRANCH_INSTRUCTIONS_RETIRED
   Equiv	 : BR_INST_RETIRED:ALL_BRANCHES
   Flags    : None
   Desc     : Count branch instructions at retirement. Specifically, this event counts the retirement of the last micro-op of a branch instruction
   Code     : 0xc4
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606344
   PMU name : snb (Intel Sandy Bridge)
   Name     : MISPREDICTED_BRANCH_RETIRED
   Equiv	 : BR_MISP_RETIRED:ALL_BRANCHES
   Flags    : None
   Desc     : Count mispredicted branch instructions at retirement. Specifically, this event counts at retirement of the last micro-op of a branch instruction in the architectural path of the execution and experienced misprediction in the branch prediction hardware
   Code     : 0xc5
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606345
   PMU name : snb (Intel Sandy Bridge)
   Name     : LOCK_CYCLES
   Equiv	 : None
   Flags    : None
   Desc     : Locked cycles in L1D and L2
   Code     : 0x63
   Umask-00 : 0x01 : PMU : [SPLIT_LOCK_UC_LOCK_DURATION] : None : Cycles in which the L1D and L2 are locked, due to a UC lock or split lock
   Umask-01 : 0x02 : PMU : [CACHE_LOCK_DURATION] : None : Cycles in which the L1D is locked
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606346
   PMU name : snb (Intel Sandy Bridge)
   Name     : CPL_CYCLES
   Equiv	 : None
   Flags    : None
   Desc     : Unhalted core cycles at a specific ring level
   Code     : 0x5c
   Umask-00 : 0x01 : PMU : [RING0] : None : Unhalted core cycles the thread was in ring 0
   Umask-01 : 0x10401 : PMU : [RING0_TRANS] : None : Alias to RING0:c=1:e=1
   Umask-02 : 0x02 : PMU : [RING123] : None : Unhalted core cycles the thread was in rings 1, 2, or 3
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606347
   PMU name : snb (Intel Sandy Bridge)
   Name     : CPU_CLK_UNHALTED
   Equiv	 : None
   Flags    : None
   Desc     : Cases when the core is unhalted at 100 Mhz
   Code     : 0x3c
   Umask-00 : 0x01 : PMU : [REF_P] : None : Cycles when the core is unhalted (count at 100 Mhz)
   Umask-01 : 0x00 : PMU : [THREAD_P] : [default] : Cycles when thread is not halted
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606348
   PMU name : snb (Intel Sandy Bridge)
   Name     : DSB2MITE_SWITCHES
   Equiv	 : None
   Flags    : None
   Desc     : Number of DSB to MITE switches
   Code     : 0xab
   Umask-00 : 0x01 : PMU : [COUNT] : [default] : Number of DSB to MITE switches
   Umask-01 : 0x02 : PMU : [PENALTY_CYCLES] : None : Cycles SB to MITE switches caused delay
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606349
   PMU name : snb (Intel Sandy Bridge)
   Name     : DSB_FILL
   Equiv	 : None
   Flags    : None
   Desc     : DSB fills
   Code     : 0xac
   Umask-00 : 0x0a : PMU : [ALL_CANCEL] : None : Number of times a valid DSB fill has been cancelled for any reason
   Umask-01 : 0x08 : PMU : [EXCEED_DSB_LINES] : None : DSB Fill encountered > 3 DSB lines
   Umask-02 : 0x02 : PMU : [OTHER_CANCEL] : None : Number of times a valid DSB fill has been cancelled not because of exceeding way limit
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606350
   PMU name : snb (Intel Sandy Bridge)
   Name     : DTLB_LOAD_MISSES
   Equiv	 : None
   Flags    : None
   Desc     : Data TLB load misses
   Code     : 0x8
   Umask-00 : 0x01 : PMU : [MISS_CAUSES_A_WALK] : None : Demand load miss in all TLB levels which causes an page walk of any page size
   Umask-01 : 0x01 : PMU : [CAUSES_A_WALK] : None : Alias to MISS_CAUSES_A_WALK
   Umask-02 : 0x10 : PMU : [STLB_HIT] : None : Number of DTLB lookups for loads which missed first level DTLB but hit second level DTLB (STLB); No page walk.
   Umask-03 : 0x02 : PMU : [WALK_COMPLETED] : None : Demand load miss in all TLB levels which causes a page walk that completes for any page size
   Umask-04 : 0x04 : PMU : [WALK_DURATION] : None : Cycles PMH is busy with a walk
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606351
   PMU name : snb (Intel Sandy Bridge)
   Name     : DTLB_STORE_MISSES
   Equiv	 : None
   Flags    : None
   Desc     : Data TLB store misses
   Code     : 0x49
   Umask-00 : 0x01 : PMU : [MISS_CAUSES_A_WALK] : None : Miss in all TLB levels that causes a page walk of any page size (4K/2M/4M/1G)
   Umask-01 : 0x01 : PMU : [CAUSES_A_WALK] : None : Alias to MISS_CAUSES_A_WALK
   Umask-02 : 0x10 : PMU : [STLB_HIT] : None : First level miss but second level hit; no page walk. Only relevant if multiple levels
   Umask-03 : 0x02 : PMU : [WALK_COMPLETED] : None : Miss in all TLB levels that causes a page walk that completes of any page size (4K/2M/4M/1G)
   Umask-04 : 0x04 : PMU : [WALK_DURATION] : None : Cycles PMH is busy with this walk
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606352
   PMU name : snb (Intel Sandy Bridge)
   Name     : FP_ASSIST
   Equiv	 : None
   Flags    : None
   Desc     : X87 Floating point assists
   Code     : 0xca
   Umask-00 : 0x1e : PMU : [ANY] : [default] : Cycles with any input/output SSE or FP assists
   Umask-01 : 0x10 : PMU : [SIMD_INPUT] : None : Number of SIMD FP assists due to input values
   Umask-02 : 0x08 : PMU : [SIMD_OUTPUT] : None : Number of SIMD FP assists due to output values
   Umask-03 : 0x04 : PMU : [X87_INPUT] : None : Number of X87 assists due to input value
   Umask-04 : 0x02 : PMU : [X87_OUTPUT] : None : Number of X87 assists due to output value
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606353
   PMU name : snb (Intel Sandy Bridge)
   Name     : FP_COMP_OPS_EXE
   Equiv	 : None
   Flags    : None
   Desc     : Counts number of floating point events
   Code     : 0x10
   Umask-00 : 0x01 : PMU : [X87] : None : Number of X87 uops executed
   Umask-01 : 0x10 : PMU : [SSE_FP_PACKED_DOUBLE] : None : Number of SSE double precision FP packed uops executed
   Umask-02 : 0x20 : PMU : [SSE_FP_SCALAR_SINGLE] : None : Number of SSE single precision FP scalar uops executed
   Umask-03 : 0x40 : PMU : [SSE_PACKED_SINGLE] : None : Number of SSE single precision FP packed uops executed
   Umask-04 : 0x80 : PMU : [SSE_SCALAR_DOUBLE] : None : Number of SSE double precision FP scalar uops executed
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606354
   PMU name : snb (Intel Sandy Bridge)
   Name     : HW_INTERRUPTS
   Equiv	 : None
   Flags    : None
   Desc     : Number of hardware interrupts received by the processor
   Code     : 0xcb
   Umask-00 : 0x01 : PMU : [RECEIVED] : [default] : Number of hardware interrupts received by the processor
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606355
   PMU name : snb (Intel Sandy Bridge)
   Name     : HW_PRE_REQ
   Equiv	 : None
   Flags    : None
   Desc     : Hardware prefetch requests
   Code     : 0x4e
   Umask-00 : 0x02 : PMU : [L1D_MISS] : [default] : Hardware prefetch requests that misses the L1D cache. A request is counted each time it accesses the cache and misses it, including if a block is applicable or if it hits the full buffer, for example. This accounts for both L1 streamer and IP-based Hw prefetchers
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606356
   PMU name : snb (Intel Sandy Bridge)
   Name     : ICACHE
   Equiv	 : None
   Flags    : None
   Desc     : Instruction Cache accesses
   Code     : 0x80
   Umask-00 : 0x02 : PMU : [MISSES] : [default] : Number of Instruction Cache, Streaming Buffer and Victim Cache Misses. Includes UC accesses
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606357
   PMU name : snb (Intel Sandy Bridge)
   Name     : IDQ
   Equiv	 : None
   Flags    : None
   Desc     : IDQ operations
   Code     : 0x79
   Umask-00 : 0x02 : PMU : [EMPTY] : None : Cycles IDQ is empty
   Umask-01 : 0x04 : PMU : [MITE_UOPS] : None : Number of uops delivered to IDQ from MITE path
   Umask-02 : 0x08 : PMU : [DSB_UOPS] : None : Number of uops delivered to IDQ from DSB path
   Umask-03 : 0x10 : PMU : [MS_DSB_UOPS] : None : Number of uops delivered to IDQ when MS busy by DSB
   Umask-04 : 0x20 : PMU : [MS_MITE_UOPS] : None : Number of uops delivered to IDQ when MS busy by MITE
   Umask-05 : 0x30 : PMU : [MS_UOPS] : None : Number of uops were delivered to IDQ from MS by either DSB or MITE
   Umask-06 : 0x10004 : PMU : [MITE_UOPS_CYCLES] : None : Alias to MITE_UOPS:c=1
   Umask-07 : 0x10008 : PMU : [DSB_UOPS_CYCLES] : None : Cycles where uops are delivered to IDQ from DSB (DSB active)
   Umask-08 : 0x10010 : PMU : [MS_DSB_UOPS_CYCLES] : None : Alias to MS_DSB_UOPS:c=1
   Umask-09 : 0x10020 : PMU : [MS_MITE_UOPS_CYCLES] : None : Alias to MS_MITE_UOPS:c=1
   Umask-10 : 0x10030 : PMU : [MS_UOPS_CYCLES] : None : Alias to MS_UOPS:c=1
   Umask-11 : 0x18 : PMU : [ALL_DSB_UOPS] : None : Number of uops deliver from either DSB paths
   Umask-12 : 0x10018 : PMU : [ALL_DSB_CYCLES] : None : Cycles MITE/MS deliver anything
   Umask-13 : 0x24 : PMU : [ALL_MITE_UOPS] : None : Number of uops delivered from either MITE paths
   Umask-14 : 0x10024 : PMU : [ALL_MITE_CYCLES] : None : Cycles DSB/MS deliver anything
   Umask-15 : 0x3c : PMU : [ANY_UOPS] : None : Number of uops delivered to IDQ from any path
   Umask-16 : 0x10410 : PMU : [MS_DSB_UOPS_OCCUR] : None : Alias to MS_DSB_UOPS:c=1:e=1
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606358
   PMU name : snb (Intel Sandy Bridge)
   Name     : IDQ_UOPS_NOT_DELIVERED
   Equiv	 : None
   Flags    : None
   Desc     : Uops not delivered
   Code     : 0x9c
   Umask-00 : 0x01 : PMU : [CORE] : [default] : Number of non-delivered uops to RAT (use cmask to qualify further)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606359
   PMU name : snb (Intel Sandy Bridge)
   Name     : ILD_STALL
   Equiv	 : None
   Flags    : None
   Desc     : Instruction Length Decoder stalls
   Code     : 0x87
   Umask-00 : 0x01 : PMU : [LCP] : None : Stall caused by changing prefix length of the instruction
   Umask-01 : 0x04 : PMU : [IQ_FULL] : None : Stall cycles due to IQ full
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606360
   PMU name : snb (Intel Sandy Bridge)
   Name     : INSTS_WRITTEN_TO_IQ
   Equiv	 : None
   Flags    : None
   Desc     : Instructions written to IQ
   Code     : 0x17
   Umask-00 : 0x01 : PMU : [INSTS] : [default] : Number of instructions written to IQ every cycle
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606361
   PMU name : snb (Intel Sandy Bridge)
   Name     : INST_RETIRED
   Equiv	 : None
   Flags    : [precise] 
   Desc     : Instructions retired
   Code     : 0xc0
   Umask-00 : 0x00 : PMU : [ANY_P] : [default] : Number of instructions retired
   Umask-01 : 0x01 : PMU : [PREC_DIST] : [precise] : Precise instruction retired event to reduce effect of PEBS shadow IP distribution (Precise Event)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606362
   PMU name : snb (Intel Sandy Bridge)
   Name     : INSTRUCTION_RETIRED
   Equiv	 : None
   Flags    : None
   Desc     : Number of instructions at retirement
   Code     : 0xc0
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606363
   PMU name : snb (Intel Sandy Bridge)
   Name     : INSTRUCTIONS_RETIRED
   Equiv	 : INSTRUCTION_RETIRED
   Flags    : None
   Desc     : This is an alias for INSTRUCTION_RETIRED
   Code     : 0xc0
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606364
   PMU name : snb (Intel Sandy Bridge)
   Name     : INT_MISC
   Equiv	 : None
   Flags    : None
   Desc     : Miscellaneous internals
   Code     : 0xd
   Umask-00 : 0x40 : PMU : [RAT_STALL_CYCLES] : None : Cycles RAT external stall is sent to IDQ for this thread
   Umask-01 : 0x10003 : PMU : [RECOVERY_CYCLES] : None : Cycles waiting to be recovered after Machine Clears due to all other cases except JEClear
   Umask-02 : 0x10403 : PMU : [RECOVERY_STALLS_COUNT] : None : Number of times need to wait after Machine Clears due to all other cases except JEClear
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606365
   PMU name : snb (Intel Sandy Bridge)
   Name     : ITLB
   Equiv	 : None
   Flags    : None
   Desc     : Instruction TLB
   Code     : 0xae
   Umask-00 : 0x01 : PMU : [ITLB_FLUSH] : [default] : Number of ITLB flushes, includes 4k/2M/4M pages
   Umask-01 : 0x01 : PMU : [FLUSH] : None : Alias to ITLB_FLUSH
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606366
   PMU name : snb (Intel Sandy Bridge)
   Name     : ITLB_MISSES
   Equiv	 : None
   Flags    : None
   Desc     : Instruction TLB misses
   Code     : 0x85
   Umask-00 : 0x01 : PMU : [MISS_CAUSES_A_WALK] : None : Miss in all TLB levels that causes a page walk of any page size (4K/2M/4M/1G)
   Umask-01 : 0x01 : PMU : [CAUSES_A_WALK] : None : Alias to MISS_CAUSES_A_WALK
   Umask-02 : 0x10 : PMU : [STLB_HIT] : None : First level miss but second level hit; no page walk. Only relevant if multiple levels
   Umask-03 : 0x02 : PMU : [WALK_COMPLETED] : None : Miss in all TLB levels that causes a page walk that completes of any page size (4K/2M/4M/1G)
   Umask-04 : 0x04 : PMU : [WALK_DURATION] : None : Cycles PMH is busy with this walk
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606367
   PMU name : snb (Intel Sandy Bridge)
   Name     : L1D
   Equiv	 : None
   Flags    : None
   Desc     : L1D cache
   Code     : 0x51
   Umask-00 : 0x02 : PMU : [ALLOCATED_IN_M] : None : Number of allocations of L1D cache lines in modified (M) state
   Umask-01 : 0x08 : PMU : [ALL_M_REPLACEMENT] : None : Number of cache lines in M-state evicted of L1D due to snoop HITM or dirty line replacement
   Umask-02 : 0x04 : PMU : [M_EVICT] : None : Number of modified lines evicted from L1D due to replacement
   Umask-03 : 0x01 : PMU : [REPLACEMENT] : None : Number of cache lines brought into the L1D cache
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606368
   PMU name : snb (Intel Sandy Bridge)
   Name     : L1D_BLOCKS
   Equiv	 : None
   Flags    : None
   Desc     : L1D is blocking
   Code     : 0xbf
   Umask-00 : 0x01 : PMU : [BANK_CONFLICT] : None : Number of dispatched loads cancelled due to L1D bank conflicts with other load ports
   Umask-01 : 0x05 : PMU : [BANK_CONFLICT_CYCLES] : [default] : Cycles with l1d blocks due to bank conflicts
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606369
   PMU name : snb (Intel Sandy Bridge)
   Name     : L1D_PEND_MISS
   Equiv	 : None
   Flags    : None
   Desc     : L1D pending misses
   Code     : 0x48
   Umask-00 : 0x10401 : PMU : [OCCURRENCES] : None : Alias to PENDING:e=1:c=1
   Umask-01 : 0x10401 : PMU : [EDGE] : None : Alias to OCCURRENCES
   Umask-02 : 0x01 : PMU : [PENDING] : None : Number of L1D load misses outstanding every cycle
   Umask-03 : 0x10001 : PMU : [PENDING_CYCLES] : None : Alias to PENDING:c=1
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606370
   PMU name : snb (Intel Sandy Bridge)
   Name     : L2_L1D_WB_RQSTS
   Equiv	 : None
   Flags    : None
   Desc     : Writeback requests from L1D to L2
   Code     : 0x28
   Umask-00 : 0x04 : PMU : [HIT_E] : None : Non rejected writebacks from L1D to L2 cache lines in E state
   Umask-01 : 0x08 : PMU : [HIT_M] : None : Non rejected writebacks from L1D to L2 cache lines in M state
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606371
   PMU name : snb (Intel Sandy Bridge)
   Name     : L2_LINES_IN
   Equiv	 : None
   Flags    : None
   Desc     : L2 lines alloacated
   Code     : 0xf1
   Umask-00 : 0x07 : PMU : [ANY] : None : L2 cache lines filling (counting does not cover rejects)
   Umask-01 : 0x04 : PMU : [E] : None : L2 cache lines in E state (counting does not cover rejects)
   Umask-02 : 0x01 : PMU : [I] : None : L2 cache lines in I state (counting does not cover rejects)
   Umask-03 : 0x02 : PMU : [S] : None : L2 cache lines in S state (counting does not cover rejects)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606372
   PMU name : snb (Intel Sandy Bridge)
   Name     : L2_LINES_OUT
   Equiv	 : None
   Flags    : None
   Desc     : L2 lines evicted
   Code     : 0xf2
   Umask-00 : 0x01 : PMU : [DEMAND_CLEAN] : None : L2 clean line evicted by a demand
   Umask-01 : 0x02 : PMU : [DEMAND_DIRTY] : None : L2 dirty line evicted by a demand
   Umask-02 : 0x04 : PMU : [PREFETCH_CLEAN] : None : L2 clean line evicted by a prefetch
   Umask-03 : 0x08 : PMU : [PREFETCH_DIRTY] : None : L2 dirty line evicted by an MLC Prefetch
   Umask-04 : 0x0a : PMU : [DIRTY_ANY] : None : Any L2 dirty line evicted (does not cover rejects)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606373
   PMU name : snb (Intel Sandy Bridge)
   Name     : L2_RQSTS
   Equiv	 : None
   Flags    : None
   Desc     : L2 requests
   Code     : 0x24
   Umask-00 : 0x30 : PMU : [ALL_CODE_RD] : None : Any ifetch request to L2 cache
   Umask-01 : 0x10 : PMU : [CODE_RD_HIT] : None : L2 cache hits when fetching instructions
   Umask-02 : 0x20 : PMU : [CODE_RD_MISS] : None : L2 cache misses when fetching instructions
   Umask-03 : 0x03 : PMU : [ALL_DEMAND_DATA_RD] : None : Demand  data read requests to L2 cache
   Umask-04 : 0x01 : PMU : [ALL_DEMAND_RD_HIT] : None : Demand data read requests that hit L2
   Umask-05 : 0xc0 : PMU : [ALL_PF] : None : Any L2 HW prefetch request to L2 cache
   Umask-06 : 0x40 : PMU : [PF_HIT] : None : Requests from the L2 hardware prefetchers that hit L2 cache
   Umask-07 : 0x80 : PMU : [PF_MISS] : None : Requests from the L2 hardware prefetchers that miss L2 cache
   Umask-08 : 0x0c : PMU : [RFO_ANY] : None : Any RFO requests to L2 cache
   Umask-09 : 0x04 : PMU : [RFO_HITS] : None : RFO requests that hit L2 cache
   Umask-10 : 0x08 : PMU : [RFO_MISS] : None : RFO requests that miss L2 cache
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606374
   PMU name : snb (Intel Sandy Bridge)
   Name     : L2_STORE_LOCK_RQSTS
   Equiv	 : None
   Flags    : None
   Desc     : L2 store lock requests
   Code     : 0x27
   Umask-00 : 0x04 : PMU : [HIT_E] : None : RFOs that hit cache lines in E state
   Umask-01 : 0x01 : PMU : [MISS] : None : RFOs that miss cache (I state)
   Umask-02 : 0x08 : PMU : [HIT_M] : None : RFOs that hit cache lines in M state
   Umask-03 : 0x0f : PMU : [ALL] : [default] : RFOs that access cache lines in any state
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606375
   PMU name : snb (Intel Sandy Bridge)
   Name     : L2_TRANS
   Equiv	 : None
   Flags    : None
   Desc     : L2 transactions
   Code     : 0xf0
   Umask-00 : 0x80 : PMU : [ALL] : None : Transactions accessing MLC pipe
   Umask-01 : 0x04 : PMU : [CODE_RD] : None : L2 cache accesses when fetching instructions
   Umask-02 : 0x10 : PMU : [L1D_WB] : None : L1D writebacks that access L2 cache
   Umask-03 : 0x01 : PMU : [LOAD] : None : Demand Data Read* requests that access L2 cache
   Umask-04 : 0x20 : PMU : [L2_FILL] : None : L2 fill requests that access L2 cache
   Umask-05 : 0x40 : PMU : [L2_WB] : None : L2 writebacks that access L2 cache
   Umask-06 : 0x08 : PMU : [ALL_PREFETCH] : None : L2 or L3 HW prefetches that access L2 cache (including rejects)
   Umask-07 : 0x02 : PMU : [RFO] : None : RFO requests that access L2 cache
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606376
   PMU name : snb (Intel Sandy Bridge)
   Name     : LAST_LEVEL_CACHE_MISSES
   Equiv	 : L3_LAT_CACHE:MISS
   Flags    : None
   Desc     : This is an alias for LLC_MISSES
   Code     : 0x412e
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606377
   PMU name : snb (Intel Sandy Bridge)
   Name     : LLC_MISSES
   Equiv	 : LAST_LEVEL_CACHE_MISSES
   Flags    : None
   Desc     : Alias for LAST_LEVEL_CACHE_MISSES
   Code     : 0x412e
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606378
   PMU name : snb (Intel Sandy Bridge)
   Name     : LAST_LEVEL_CACHE_REFERENCES
   Equiv	 : L3_LAT_CACHE:REFERENCE
   Flags    : None
   Desc     : This is an alias for LLC_REFERENCES
   Code     : 0x4f2e
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606379
   PMU name : snb (Intel Sandy Bridge)
   Name     : LLC_REFERENCES
   Equiv	 : LAST_LEVEL_CACHE_REFERENCES
   Flags    : None
   Desc     : Alias for LAST_LEVEL_CACHE_REFERENCES
   Code     : 0x4f2e
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606380
   PMU name : snb (Intel Sandy Bridge)
   Name     : LD_BLOCKS
   Equiv	 : None
   Flags    : None
   Desc     : Blocking loads
   Code     : 0x3
   Umask-00 : 0x01 : PMU : [DATA_UNKNOWN] : None : Blocked loads due to store buffer blocks with unknown data
   Umask-01 : 0x02 : PMU : [STORE_FORWARD] : None : Loads blocked by overlapping with store buffer that cannot be forwarded
   Umask-02 : 0x08 : PMU : [NO_SR] : None : Number of split loads blocked due to resource not available
   Umask-03 : 0x10 : PMU : [ALL_BLOCK] : None : Number of cases where any load is blocked but has not DCU miss
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606381
   PMU name : snb (Intel Sandy Bridge)
   Name     : LD_BLOCKS_PARTIAL
   Equiv	 : None
   Flags    : None
   Desc     : Partial load blocks
   Code     : 0x7
   Umask-00 : 0x01 : PMU : [ADDRESS_ALIAS] : None : False dependencies in MOB due to partial compare on address
   Umask-01 : 0x08 : PMU : [ALL_STA_BLOCK] : None : Number of times that load operations are temporarily blocked because of older stores, with addresses that are not yet known. A load operation may incur more than one block of this type
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606382
   PMU name : snb (Intel Sandy Bridge)
   Name     : LOAD_HIT_PRE
   Equiv	 : None
   Flags    : None
   Desc     : Load dispatches that hit fill buffer
   Code     : 0x4c
   Umask-00 : 0x02 : PMU : [HW_PF] : None : Non sw-prefetch load dispatches that hit the fill buffer allocated for HW prefetch
   Umask-01 : 0x01 : PMU : [SW_PF] : None : Non sw-prefetch load dispatches that hit the fill buffer allocated for SW prefetch
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606383
   PMU name : snb (Intel Sandy Bridge)
   Name     : L3_LAT_CACHE
   Equiv	 : None
   Flags    : None
   Desc     : Core-originated cacheable demand requests to L3
   Code     : 0x2e
   Umask-00 : 0x01 : PMU : [MISS] : None : Core-originated cacheable demand requests missed L3
   Umask-01 : 0x02 : PMU : [REFERENCE] : None : Core-originated cacheable demand requests that refer to L3
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606384
   PMU name : snb (Intel Sandy Bridge)
   Name     : MACHINE_CLEARS
   Equiv	 : None
   Flags    : None
   Desc     : Machine clear asserted
   Code     : 0xc3
   Umask-00 : 0x20 : PMU : [MASKMOV] : None : The number of executed Intel AVX masked load operations that refer to an illegal address range with the mask bits set to 0
   Umask-01 : 0x02 : PMU : [MEMORY_ORDERING] : None : Number of Memory Ordering Machine Clears detected
   Umask-02 : 0x04 : PMU : [SMC] : None : Self-Modifying Code detected
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606385
   PMU name : snb (Intel Sandy Bridge)
   Name     : MEM_LOAD_UOPS_LLC_HIT_RETIRED
   Equiv	 : None
   Flags    : [precise] 
   Desc     : L3 hit loads uops retired
   Code     : 0xd2
   Umask-00 : 0x02 : PMU : [XSNP_HIT] : [precise] : Load LLC Hit and a cross-core Snoop hits in on-pkg core cache (Precise Event)
   Umask-01 : 0x04 : PMU : [XSNP_HITM] : [precise] : Load had HitM Response from a core on same socket (shared LLC) (Precise Event)
   Umask-02 : 0x01 : PMU : [XSNP_MISS] : [precise] : Load LLC Hit and a cross-core Snoop missed in on-pkg core cache (Precise Event)
   Umask-03 : 0x08 : PMU : [XSNP_NONE] : [precise] : Load hit in last-level (L3) cache with no snoop needed (Precise Event)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606386
   PMU name : snb (Intel Sandy Bridge)
   Name     : MEM_LOAD_LLC_HIT_RETIRED
   Equiv	 : MEM_LOAD_UOPS_LLC_HIT_RETIRED
   Flags    : [precise] 
   Desc     : L3 hit loads uops retired (deprecated use MEM_LOAD_UOPS_LLC_HIT_RETIRED)
   Code     : 0xd2
   Umask-00 : 0x02 : PMU : [XSNP_HIT] : [precise] : Load LLC Hit and a cross-core Snoop hits in on-pkg core cache (Precise Event)
   Umask-01 : 0x04 : PMU : [XSNP_HITM] : [precise] : Load had HitM Response from a core on same socket (shared LLC) (Precise Event)
   Umask-02 : 0x01 : PMU : [XSNP_MISS] : [precise] : Load LLC Hit and a cross-core Snoop missed in on-pkg core cache (Precise Event)
   Umask-03 : 0x08 : PMU : [XSNP_NONE] : [precise] : Load hit in last-level (L3) cache with no snoop needed (Precise Event)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606387
   PMU name : snb (Intel Sandy Bridge)
   Name     : MEM_LOAD_UOPS_MISC_RETIRED
   Equiv	 : None
   Flags    : [precise] 
   Desc     : Loads and some non simd split loads uops retired
   Code     : 0xd4
   Umask-00 : 0x02 : PMU : [LLC_MISS] : [default] [precise] : Counts load driven L3 misses and some non simd split loads (Precise Event)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606388
   PMU name : snb (Intel Sandy Bridge)
   Name     : MEM_LOAD_MISC_RETIRED
   Equiv	 : MEM_LOAD_UOPS_MISC_RETIRED
   Flags    : [precise] 
   Desc     : Loads and some non simd split loads uops retired (deprecated use MEM_LOAD_UOPS_MISC_RETIRED)
   Code     : 0xd4
   Umask-00 : 0x02 : PMU : [LLC_MISS] : [default] [precise] : Counts load driven L3 misses and some non simd split loads (Precise Event)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606389
   PMU name : snb (Intel Sandy Bridge)
   Name     : MEM_LOAD_UOPS_RETIRED
   Equiv	 : None
   Flags    : [precise] 
   Desc     : Memory loads uops retired
   Code     : 0xd1
   Umask-00 : 0x40 : PMU : [HIT_LFB] : [precise] : A load missed L1D but hit the Fill Buffer (Precise Event)
   Umask-01 : 0x01 : PMU : [L1_HIT] : [precise] : Load hit in nearest-level (L1D) cache (Precise Event)
   Umask-02 : 0x02 : PMU : [L2_HIT] : [precise] : Load hit in mid-level (L2) cache (Precise Event)
   Umask-03 : 0x04 : PMU : [L3_HIT] : [precise] : Load hit in last-level (L3) cache with no snoop needed (Precise Event)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606390
   PMU name : snb (Intel Sandy Bridge)
   Name     : MEM_LOAD_RETIRED
   Equiv	 : MEM_LOAD_UOPS_RETIRED
   Flags    : [precise] 
   Desc     : Memory loads uops retired (deprecated use MEM_LOAD_UOPS_RETIRED)
   Code     : 0xd1
   Umask-00 : 0x40 : PMU : [HIT_LFB] : [precise] : A load missed L1D but hit the Fill Buffer (Precise Event)
   Umask-01 : 0x01 : PMU : [L1_HIT] : [precise] : Load hit in nearest-level (L1D) cache (Precise Event)
   Umask-02 : 0x02 : PMU : [L2_HIT] : [precise] : Load hit in mid-level (L2) cache (Precise Event)
   Umask-03 : 0x04 : PMU : [L3_HIT] : [precise] : Load hit in last-level (L3) cache with no snoop needed (Precise Event)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606391
   PMU name : snb (Intel Sandy Bridge)
   Name     : MEM_TRANS_RETIRED
   Equiv	 : None
   Flags    : [precise] 
   Desc     : Memory transactions retired
   Code     : 0xcd
   Umask-00 : 0x01 : PMU : [LATENCY_ABOVE_THRESHOLD] : [precise] : Memory load instructions retired above programmed clocks, minimum value threshold is 4 (Precise Event required)
   Umask-01 : 0x02 : PMU : [PRECISE_STORE] : [precise] : Capture where stores occur, must use with PEBS (Precise Event required)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606392
   PMU name : snb (Intel Sandy Bridge)
   Name     : MEM_UOPS_RETIRED
   Equiv	 : None
   Flags    : [precise] 
   Desc     : Memory uops retired
   Code     : 0xd0
   Umask-00 : 0x81 : PMU : [ALL_LOADS] : [precise] : Any retired loads (Precise Event)
   Umask-01 : 0x81 : PMU : [ANY_LOADS] : [precise] : Alias to ALL_LOADS
   Umask-02 : 0x82 : PMU : [ALL_STORES] : [precise] : Any retired stores (Precise Event)
   Umask-03 : 0x82 : PMU : [ANY_STORES] : [precise] : Alias to ALL_STORES
   Umask-04 : 0x21 : PMU : [LOCK_LOADS] : [precise] : Locked retired loads (Precise Event)
   Umask-05 : 0x22 : PMU : [LOCK_STORES] : [precise] : Locked retired stores (Precise Event)
   Umask-06 : 0x41 : PMU : [SPLIT_LOADS] : [precise] : Retired loads causing cacheline splits (Precise Event)
   Umask-07 : 0x42 : PMU : [SPLIT_STORES] : [precise] : Retired stores causing cacheline splits (Precise Event)
   Umask-08 : 0x11 : PMU : [STLB_MISS_LOADS] : [precise] : STLB misses dues to retired loads (Precise Event)
   Umask-09 : 0x12 : PMU : [STLB_MISS_STORES] : [precise] : STLB misses dues to retired stores (Precise Event)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606393
   PMU name : snb (Intel Sandy Bridge)
   Name     : MEM_UOP_RETIRED
   Equiv	 : MEM_UOPS_RETIRED
   Flags    : [precise] 
   Desc     : Memory uops retired (deprecated use MEM_UOPS_RETIRED)
   Code     : 0xd0
   Umask-00 : 0x81 : PMU : [ALL_LOADS] : [precise] : Any retired loads (Precise Event)
   Umask-01 : 0x81 : PMU : [ANY_LOADS] : [precise] : Alias to ALL_LOADS
   Umask-02 : 0x82 : PMU : [ALL_STORES] : [precise] : Any retired stores (Precise Event)
   Umask-03 : 0x82 : PMU : [ANY_STORES] : [precise] : Alias to ALL_STORES
   Umask-04 : 0x21 : PMU : [LOCK_LOADS] : [precise] : Locked retired loads (Precise Event)
   Umask-05 : 0x22 : PMU : [LOCK_STORES] : [precise] : Locked retired stores (Precise Event)
   Umask-06 : 0x41 : PMU : [SPLIT_LOADS] : [precise] : Retired loads causing cacheline splits (Precise Event)
   Umask-07 : 0x42 : PMU : [SPLIT_STORES] : [precise] : Retired stores causing cacheline splits (Precise Event)
   Umask-08 : 0x11 : PMU : [STLB_MISS_LOADS] : [precise] : STLB misses dues to retired loads (Precise Event)
   Umask-09 : 0x12 : PMU : [STLB_MISS_STORES] : [precise] : STLB misses dues to retired stores (Precise Event)
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606394
   PMU name : snb (Intel Sandy Bridge)
   Name     : MISALIGN_MEM_REF
   Equiv	 : None
   Flags    : None
   Desc     : Misaligned memory references
   Code     : 0x5
   Umask-00 : 0x01 : PMU : [LOADS] : None : Speculative cache-line split load uops dispatched to the L1D
   Umask-01 : 0x02 : PMU : [STORES] : None : Speculative cache-line split Store-address uops dispatched to L1D
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606395
   PMU name : snb (Intel Sandy Bridge)
   Name     : OFFCORE_REQUESTS
   Equiv	 : None
   Flags    : None
   Desc     : Offcore requests
   Code     : 0xb0
   Umask-00 : 0x08 : PMU : [ALL_DATA_RD] : None : Demand and prefetch read requests sent to uncore
   Umask-01 : 0x08 : PMU : [ALL_DATA_READ] : None : Alias to ALL_DATA_RD
   Umask-02 : 0x02 : PMU : [DEMAND_CODE_RD] : None : Offcore code read requests, including cacheable and un-cacheables
   Umask-03 : 0x01 : PMU : [DEMAND_DATA_RD] : None : Demand Data Read requests sent to uncore
   Umask-04 : 0x04 : PMU : [DEMAND_RFO] : None : Offcore Demand RFOs, includes regular RFO, Locks, ItoM
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606396
   PMU name : snb (Intel Sandy Bridge)
   Name     : OFFCORE_REQUESTS_BUFFER
   Equiv	 : None
   Flags    : None
   Desc     : Offcore requests buffer
   Code     : 0xb2
   Umask-00 : 0x01 : PMU : [SQ_FULL] : [default] : Offcore requests buffer cannot take more entries for this thread core
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606397
   PMU name : snb (Intel Sandy Bridge)
   Name     : OFFCORE_REQUESTS_OUTSTANDING
   Equiv	 : None
   Flags    : None
   Desc     : Outstanding offcore requests
   Code     : 0x60
   Umask-00 : 0x10008 : PMU : [ALL_DATA_RD_CYCLES] : None : Alias to ALL_DATA_RD:c=1
   Umask-01 : 0x10002 : PMU : [DEMAND_CODE_RD_CYCLES] : None : Alias to DEMAND_CODE_RD:c=1
   Umask-02 : 0x10001 : PMU : [DEMAND_DATA_RD_CYCLES] : None : Alias to DEMAND_DATA_RD:c=1
   Umask-03 : 0x08 : PMU : [ALL_DATA_RD] : None : Cacheable data read transactions in the superQ every cycle
   Umask-04 : 0x02 : PMU : [DEMAND_CODE_RD] : None : Code read transactions in the superQ every cycle
   Umask-05 : 0x01 : PMU : [DEMAND_DATA_RD] : None : Demand data read transactions in the superQ every cycle
   Umask-06 : 0x04 : PMU : [DEMAND_RFO] : None : Outstanding RFO (store) transactions in the superQ every cycle
   Umask-07 : 0x10004 : PMU : [DEMAND_RFO_CYCLES] : None : Alias to DEMAND_RFO:c=1
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606398
   PMU name : snb (Intel Sandy Bridge)
   Name     : OTHER_ASSISTS
   Equiv	 : None
   Flags    : None
   Desc     : Count hardware assists
   Code     : 0xc1
   Umask-00 : 0x02 : PMU : [ITLB_MISS_RETIRED] : None : Number of instructions that experienced an ITLB miss
   Umask-01 : 0x10 : PMU : [AVX_TO_SSE] : None : Number of transitions from AVX-256 to legacy SSE when penalty applicable
   Umask-02 : 0x20 : PMU : [SSE_TO_AVX] : None : Number of transitions from legacy SSE to AVX-256 when penalty applicable
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606399
   PMU name : snb (Intel Sandy Bridge)
   Name     : PARTIAL_RAT_STALLS
   Equiv	 : None
   Flags    : None
   Desc     : Partial Register Allocation Table stalls
   Code     : 0x59
   Umask-00 : 0x20 : PMU : [FLAGS_MERGE_UOP] : None : Number of flags-merge uops in flight in each cycle
   Umask-01 : 0x10020 : PMU : [CYCLES_FLAGS_MERGE_UOP] : None : Alias to FLAGS_MERGE_UOP:c=1
   Umask-02 : 0x80 : PMU : [MUL_SINGLE_UOP] : None : Number of Multiply packed/scalar single precision uops allocated
   Umask-03 : 0x40 : PMU : [SLOW_LEA_WINDOW] : None : Number of cycles with at least one slow LEA uop allocated
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606400
   PMU name : snb (Intel Sandy Bridge)
   Name     : RESOURCE_STALLS
   Equiv	 : None
   Flags    : None
   Desc     : Resource related stall cycles
   Code     : 0xa2
   Umask-00 : 0x01 : PMU : [ANY] : [default] : Cycles stalled due to Resource Related reason
   Umask-01 : 0x02 : PMU : [LB] : None : Cycles stalled due to lack of load buffers
   Umask-02 : 0x04 : PMU : [RS] : None : Cycles stalled due to no eligible RS entry available
   Umask-03 : 0x08 : PMU : [SB] : None : Cycles stalled due to no store buffers available (not including draining from sync)
   Umask-04 : 0x10 : PMU : [ROB] : None : Cycles stalled due to re-order buffer full
   Umask-05 : 0x20 : PMU : [FCSW] : None : Cycles stalled due to writing the FPU control word
   Umask-06 : 0x40 : PMU : [MXCSR] : None : Cycles stalled due to the MXCSR register ranme occurring too close to a previous MXCSR rename
   Umask-07 : 0x0e : PMU : [MEM_RS] : None : Alias to LB:SB:RS
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606401
   PMU name : snb (Intel Sandy Bridge)
   Name     : RESOURCE_STALLS2
   Equiv	 : None
   Flags    : None
   Desc     : Resource related stall cycles
   Code     : 0x5b
   Umask-00 : 0x0c : PMU : [ALL_FL_EMPTY] : None : Cycles stalled due to free list empty
   Umask-01 : 0x0f : PMU : [ALL_PRF_CONTROL] : None : Cycles stalls due to control structures full for physical registers
   Umask-02 : 0x0f : PMU : [ANY_PRF_CONTROL] : None : Alias to ALL_PRF_CONTROL
   Umask-03 : 0x40 : PMU : [BOB_FULL] : None : Cycles Allocator is stalled due Branch Order Buffer
   Umask-04 : 0x4f : PMU : [OOO_RSRC] : None : Cycles stalled due to out of order resources full
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606402
   PMU name : snb (Intel Sandy Bridge)
   Name     : ROB_MISC_EVENTS
   Equiv	 : None
   Flags    : None
   Desc     : Reorder buffer events
   Code     : 0xcc
   Umask-00 : 0x20 : PMU : [LBR_INSERTS] : [default] : Count each time an new LBR record is saved by HW
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606403
   PMU name : snb (Intel Sandy Bridge)
   Name     : RS_EVENTS
   Equiv	 : None
   Flags    : None
   Desc     : Reservation station events
   Code     : 0x5e
   Umask-00 : 0x01 : PMU : [EMPTY_CYCLES] : [default] : Cycles the RS is empty for this thread
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606404
   PMU name : snb (Intel Sandy Bridge)
   Name     : SIMD_FP_256
   Equiv	 : None
   Flags    : None
   Desc     : Counts 256-bit packed floating point instructions
   Code     : 0x11
   Umask-00 : 0x01 : PMU : [PACKED_SINGLE] : None : Counts 256-bit packed single-precision
   Umask-01 : 0x02 : PMU : [PACKED_DOUBLE] : None : Counts 256-bit packed double-precision
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606405
   PMU name : snb (Intel Sandy Bridge)
   Name     : SQ_MISC
   Equiv	 : None
   Flags    : None
   Desc     : SuperQ events
   Code     : 0xf4
   Umask-00 : 0x10 : PMU : [SPLIT_LOCK] : [default] : Split locks in SQ
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606406
   PMU name : snb (Intel Sandy Bridge)
   Name     : TLB_FLUSH
   Equiv	 : None
   Flags    : None
   Desc     : TLB flushes
   Code     : 0xbd
   Umask-00 : 0x01 : PMU : [DTLB_THREAD] : None : Number of DTLB flushes of thread-specific entries
   Umask-01 : 0x20 : PMU : [STLB_ANY] : [default] : Number of STLB flushes
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606407
   PMU name : snb (Intel Sandy Bridge)
   Name     : UNHALTED_CORE_CYCLES
   Equiv	 : None
   Flags    : None
   Desc     : Count core clock cycles whenever the clock signal on the specific core is running (not halted)
   Code     : 0x3c
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606408
   PMU name : snb (Intel Sandy Bridge)
   Name     : UNHALTED_REFERENCE_CYCLES
   Equiv	 : None
   Flags    : None
   Desc     : Unhalted reference cycles
   Code     : 0x300
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606409
   PMU name : snb (Intel Sandy Bridge)
   Name     : UOPS_DISPATCHED
   Equiv	 : None
   Flags    : None
   Desc     : Uops dispatched
   Code     : 0xb1
   Umask-00 : 0x02 : PMU : [CORE] : None : Counts total number of uops dispatched from any thread
   Umask-01 : 0x18001 : PMU : [STALL_CYCLES] : None : Alias to THREAD:c=1:i=1
   Umask-02 : 0x01 : PMU : [THREAD] : None : Counts total number of uops to be dispatched per-thread each cycle
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606410
   PMU name : snb (Intel Sandy Bridge)
   Name     : UOPS_DISPATCHED_PORT
   Equiv	 : None
   Flags    : None
   Desc     : Uops dispatch to specific ports
   Code     : 0xa1
   Umask-00 : 0x01 : PMU : [PORT_0] : None : Cycles which a Uop is dispatched on port 0
   Umask-01 : 0x02 : PMU : [PORT_1] : None : Cycles which a Uop is dispatched on port 1
   Umask-02 : 0x04 : PMU : [PORT_2_LD] : None : Cycles in which a load uop is dispatched on port 2
   Umask-03 : 0x08 : PMU : [PORT_2_STA] : None : Cycles in which a store uop is dispatched on port 2
   Umask-04 : 0x0c : PMU : [PORT_2] : None : Cycles in which a uop is dispatched on port 2
   Umask-05 : 0x10 : PMU : [PORT_3_LD] : None : Cycles in which a load uop is disptached on port 3
   Umask-06 : 0x20 : PMU : [PORT_3_STA] : None : Cycles in which a store uop is disptached on port 3
   Umask-07 : 0x30 : PMU : [PORT_3] : None : Cycles in which a uop is disptached on port 3
   Umask-08 : 0x40 : PMU : [PORT_4] : None : Cycles which a uop is dispatched on port 4
   Umask-09 : 0x80 : PMU : [PORT_5] : None : Cycles which a Uop is dispatched on port 5
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606411
   PMU name : snb (Intel Sandy Bridge)
   Name     : UOPS_ISSUED
   Equiv	 : None
   Flags    : None
   Desc     : Uops issued
   Code     : 0xe
   Umask-00 : 0x01 : PMU : [ANY] : [default] : Number of uops issued by the RAT to the Reservation Station (RS)
   Umask-01 : 0x1a001 : PMU : [CORE_STALL_CYCLES] : None : Alias to ANY:c=1:i=1:t=1
   Umask-02 : 0x18001 : PMU : [STALL_CYCLES] : None : Alias to ANY:c=1:i=1
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606412
   PMU name : snb (Intel Sandy Bridge)
   Name     : UOPS_RETIRED
   Equiv	 : None
   Flags    : [precise] 
   Desc     : Uops retired
   Code     : 0xc2
   Umask-00 : 0x01 : PMU : [ALL] : [default] [precise] : All uops that actually retired (Precise Event)
   Umask-01 : 0x01 : PMU : [ANY] : [precise] : Alias to ALL
   Umask-02 : 0x02 : PMU : [RETIRE_SLOTS] : [precise] : Number of retirement slots used (Precise Event)
   Umask-03 : 0x18001 : PMU : [STALL_CYCLES] : [precise] : Alias to ALL:c=1:i=1
   Umask-04 : 0x100001 : PMU : [TOTAL_CYCLES] : [precise] : Alias to ALL:c=16
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606413
   PMU name : snb (Intel Sandy Bridge)
   Name     : OFFCORE_RESPONSE_0
   Equiv	 : None
   Flags    : None
   Desc     : Offcore response event (must provide at least one request type and either any_response or any combination of supplier + snoop)
   Code     : 0x1b7
   Umask-00 : 0x01 : PMU : [DMND_DATA_RD] : None : Request: number of demand and DCU prefetch data reads of full and partial cachelines as well as demand data page table entry cacheline reads. Does not count L2 data read prefetches or instruction fetches
   Umask-01 : 0x02 : PMU : [DMND_RFO] : None : Request: number of demand and DCU prefetch reads for ownership (RFO) requests generated by a write to data cacheline. Does not count L2 RFO prefetches
   Umask-02 : 0x04 : PMU : [DMND_IFETCH] : None : Request: number of demand and DCU prefetch instruction cacheline reads. Does not count L2 code read prefetches
   Umask-03 : 0x08 : PMU : [WB] : None : Request: number of writebacks (modified to exclusive) transactions
   Umask-04 : 0x10 : PMU : [PF_DATA_RD] : None : Request: number of data cacheline reads generated by L2 prefetchers
   Umask-05 : 0x20 : PMU : [PF_RFO] : None : Request: number of RFO requests generated by L2 prefetchers
   Umask-06 : 0x40 : PMU : [PF_IFETCH] : None : Request: number of code reads generated by L2 prefetchers
   Umask-07 : 0x80 : PMU : [PF_LLC_DATA_RD] : None : Request: number of L3 prefetcher requests to L2 for loads
   Umask-08 : 0x100 : PMU : [PF_LLC_RFO] : None : Request: number of RFO requests generated by L2 prefetcher
   Umask-09 : 0x200 : PMU : [PF_LLC_IFETCH] : None : Request: number of L2 prefetcher requests to L3 for instruction fetches
   Umask-10 : 0x400 : PMU : [BUS_LOCKS] : None : Request: number bus lock and split lock requests
   Umask-11 : 0x800 : PMU : [STRM_ST] : None : Request: number of streaming store requests
   Umask-12 : 0x8000 : PMU : [OTHER] : None : Request: counts one of the following transaction types, including L3 invalidate, I/O, full or partial writes, WC or non-temporal stores, CLFLUSH, Fences, lock, unlock, split lock
   Umask-13 : 0x241 : PMU : [ANY_IFETCH] : None : Alias to PF_IFETCH:DMND_IFETCH:PF_LLC_IFETCH
   Umask-14 : 0x8fff : PMU : [ANY_REQUEST] : [default] : Alias to DMND_DATA_RD:DMND_RFO:DMND_IFETCH:WB:PF_DATA_RD:PF_RFO:PF_IFETCH:PF_LLC_DATA_RD:PF_LLC_RFO:PF_LLC_IFETCH:BUS_LOCKS:STRM_ST:OTHER
   Umask-15 : 0x91 : PMU : [ANY_DATA] : None : Alias to DMND_DATA_RD:PF_DATA_RD:PF_LLC_DATA_RD
   Umask-16 : 0x103 : PMU : [ANY_RFO] : None : Alias to DMND_RFO:PF_RFO:PF_LLC_RFO
   Umask-17 : 0x10000 : PMU : [ANY_RESPONSE] : [default] : Response: count any response type
   Umask-18 : 0x20000 : PMU : [NO_SUPP] : None : Supplier: counts number of times supplier information is not available
   Umask-19 : 0x40000 : PMU : [LLC_HITM] : None : Supplier: counts L3 hits in M-state (initial lookup)
   Umask-20 : 0x80000 : PMU : [LLC_HITE] : None : Supplier: counts L3 hits in E-state
   Umask-21 : 0x100000 : PMU : [LLC_HITS] : None : Supplier: counts L3 hits in S-state
   Umask-22 : 0x200000 : PMU : [LLC_HITF] : None : Supplier: counts L3 hits in F-state
   Umask-23 : 0x400000 : PMU : [LLC_MISS_LOCAL] : None : Supplier: counts L3 misses to local DRAM
   Umask-24 : 0x3c0000 : PMU : [LLC_HITMESF] : None : Alias to LLC_HITM:LLC_HITE:LLC_HITS:LLC_HITF
   Umask-25 : 0x80000000 : PMU : [SNP_NONE] : None : Snoop: counts number of times no snoop-related information is available
   Umask-26 : 0x100000000 : PMU : [SNP_NOT_NEEDED] : None : Snoop: counts the number of times no snoop was needed to satisfy the request
   Umask-27 : 0x200000000 : PMU : [SNP_MISS] : None : Snoop: counts number of times a snoop was needed and it missed all snooped caches
   Umask-28 : 0x400000000 : PMU : [SNP_NO_FWD] : None : Snoop: counts number of times a snoop was needed and it hit in at leas one snooped cache
   Umask-29 : 0x800000000 : PMU : [SNP_FWD] : None : Snoop: counts number of times a snoop was needed and data was forwarded from a remote socket
   Umask-30 : 0x1000000000 : PMU : [HITM] : None : Snoop: counts number of times a snoop was needed and it hitM-ed in local or remote cache
   Umask-31 : 0x2000000000 : PMU : [NON_DRAM] : None : Snoop:  counts number of times target was a non-DRAM system address. This includes MMIO transactions
   Umask-32 : 0x3f80000000 : PMU : [SNP_ANY] : [default] : Alias to SNP_NONE:SNP_NOT_NEEDED:SNP_MISS:SNP_NO_FWD:SNP_FWD:HITM:NON_DRAM
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)
   #-----------------------------
   IDX	 : 142606414
   PMU name : snb (Intel Sandy Bridge)
   Name     : OFFCORE_RESPONSE_1
   Equiv	 : None
   Flags    : None
   Desc     : Offcore response event (must provide at least one request type and either any_response or any combination of supplier + snoop)
   Code     : 0x1bb
   Umask-00 : 0x01 : PMU : [DMND_DATA_RD] : None : Request: number of demand and DCU prefetch data reads of full and partial cachelines as well as demand data page table entry cacheline reads. Does not count L2 data read prefetches or instruction fetches
   Umask-01 : 0x02 : PMU : [DMND_RFO] : None : Request: number of demand and DCU prefetch reads for ownership (RFO) requests generated by a write to data cacheline. Does not count L2 RFO prefetches
   Umask-02 : 0x04 : PMU : [DMND_IFETCH] : None : Request: number of demand and DCU prefetch instruction cacheline reads. Does not count L2 code read prefetches
   Umask-03 : 0x08 : PMU : [WB] : None : Request: number of writebacks (modified to exclusive) transactions
   Umask-04 : 0x10 : PMU : [PF_DATA_RD] : None : Request: number of data cacheline reads generated by L2 prefetchers
   Umask-05 : 0x20 : PMU : [PF_RFO] : None : Request: number of RFO requests generated by L2 prefetchers
   Umask-06 : 0x40 : PMU : [PF_IFETCH] : None : Request: number of code reads generated by L2 prefetchers
   Umask-07 : 0x80 : PMU : [PF_LLC_DATA_RD] : None : Request: number of L3 prefetcher requests to L2 for loads
   Umask-08 : 0x100 : PMU : [PF_LLC_RFO] : None : Request: number of RFO requests generated by L2 prefetcher
   Umask-09 : 0x200 : PMU : [PF_LLC_IFETCH] : None : Request: number of L2 prefetcher requests to L3 for instruction fetches
   Umask-10 : 0x400 : PMU : [BUS_LOCKS] : None : Request: number bus lock and split lock requests
   Umask-11 : 0x800 : PMU : [STRM_ST] : None : Request: number of streaming store requests
   Umask-12 : 0x8000 : PMU : [OTHER] : None : Request: counts one of the following transaction types, including L3 invalidate, I/O, full or partial writes, WC or non-temporal stores, CLFLUSH, Fences, lock, unlock, split lock
   Umask-13 : 0x241 : PMU : [ANY_IFETCH] : None : Alias to PF_IFETCH:DMND_IFETCH:PF_LLC_IFETCH
   Umask-14 : 0x8fff : PMU : [ANY_REQUEST] : [default] : Alias to DMND_DATA_RD:DMND_RFO:DMND_IFETCH:WB:PF_DATA_RD:PF_RFO:PF_IFETCH:PF_LLC_DATA_RD:PF_LLC_RFO:PF_LLC_IFETCH:BUS_LOCKS:STRM_ST:OTHER
   Umask-15 : 0x91 : PMU : [ANY_DATA] : None : Alias to DMND_DATA_RD:PF_DATA_RD:PF_LLC_DATA_RD
   Umask-16 : 0x103 : PMU : [ANY_RFO] : None : Alias to DMND_RFO:PF_RFO:PF_LLC_RFO
   Umask-17 : 0x10000 : PMU : [ANY_RESPONSE] : [default] : Response: count any response type
   Umask-18 : 0x20000 : PMU : [NO_SUPP] : None : Supplier: counts number of times supplier information is not available
   Umask-19 : 0x40000 : PMU : [LLC_HITM] : None : Supplier: counts L3 hits in M-state (initial lookup)
   Umask-20 : 0x80000 : PMU : [LLC_HITE] : None : Supplier: counts L3 hits in E-state
   Umask-21 : 0x100000 : PMU : [LLC_HITS] : None : Supplier: counts L3 hits in S-state
   Umask-22 : 0x200000 : PMU : [LLC_HITF] : None : Supplier: counts L3 hits in F-state
   Umask-23 : 0x400000 : PMU : [LLC_MISS_LOCAL] : None : Supplier: counts L3 misses to local DRAM
   Umask-24 : 0x3c0000 : PMU : [LLC_HITMESF] : None : Alias to LLC_HITM:LLC_HITE:LLC_HITS:LLC_HITF
   Umask-25 : 0x80000000 : PMU : [SNP_NONE] : None : Snoop: counts number of times no snoop-related information is available
   Umask-26 : 0x100000000 : PMU : [SNP_NOT_NEEDED] : None : Snoop: counts the number of times no snoop was needed to satisfy the request
   Umask-27 : 0x200000000 : PMU : [SNP_MISS] : None : Snoop: counts number of times a snoop was needed and it missed all snooped caches
   Umask-28 : 0x400000000 : PMU : [SNP_NO_FWD] : None : Snoop: counts number of times a snoop was needed and it hit in at leas one snooped cache
   Umask-29 : 0x800000000 : PMU : [SNP_FWD] : None : Snoop: counts number of times a snoop was needed and data was forwarded from a remote socket
   Umask-30 : 0x1000000000 : PMU : [HITM] : None : Snoop: counts number of times a snoop was needed and it hitM-ed in local or remote cache
   Umask-31 : 0x2000000000 : PMU : [NON_DRAM] : None : Snoop:  counts number of times target was a non-DRAM system address. This includes MMIO transactions
   Umask-32 : 0x3f80000000 : PMU : [SNP_ANY] : [default] : Alias to SNP_NONE:SNP_NOT_NEEDED:SNP_MISS:SNP_NO_FWD:SNP_FWD:HITM:NON_DRAM
   Modif-00 : 0x00 : PMU : [k] : monitor at priv level 0 (boolean)
   Modif-01 : 0x01 : PMU : [u] : monitor at priv level 1, 2, 3 (boolean)
   Modif-02 : 0x02 : PMU : [e] : edge level (may require counter-mask >= 1) (boolean)
   Modif-03 : 0x03 : PMU : [i] : invert (boolean)
   Modif-04 : 0x04 : PMU : [c] : counter-mask in range [0-255] (integer)
   Modif-05 : 0x05 : PMU : [t] : measure any thread (boolean)