Added a new option to wspy to get the performance counters from the linux kernel. This builds on my previous learnings to inventory the system and build counter information provided by the system including event numbers, umasks and other fields.

Will make it easier to programatically use counter names in a planned measurement option. One shortcut I have made so far is to make it work for systems I have (Intel Haswell, Intel Silvermont, AMD Jaguar and AMD Kaveri) but not yet completely generalize the mask processing to any values presented by the kernel.

Below is the list of counters provided on my i7-4770 reference machine. Note that some counter names such as “clockticks” are part of multiple devices and hence have the group prepended. Others such as “instructions” only appear in one group and the group name is not prepended.

mev@popayan:~/wspy$ ./wspy --show-counters sleep 5
./wspy: running until sleep completes
   uncore_cbox_3.clockticks    type=11 config=0x000000ff
      cstate_pkg.c3-residency  type=15 config=0x00000001
      cstate_pkg.c6-residency  type=15 config=0x00000002
      cstate_pkg.c7-residency  type=15 config=0x00000003
                  c2-residency type=15 config=0x00000000
   uncore_cbox_1.clockticks    type=9  config=0x000000ff
                    energy-ram type=13 config=0x00000003
                    energy-gpu type=13 config=0x00000004
                  energy-cores type=13 config=0x00000001
                    energy-pkg type=13 config=0x00000002
      topdown-recovery-bubbles type=4  config=0x0120030d
          topdown-slots-issued type=4  config=0x0000010e
         topdown-fetch-bubbles type=4  config=0x0000019c
                     mem-loads type=4  config=0x000001cd config1=0x00000003
                     el-commit type=4  config=0x000002c8
                   el-capacity type=4  config=0x00000254
           topdown-total-slots type=4  config=0x0020003c
                   el-conflict type=4  config=0x00000154
                    mem-stores type=4  config=0x000082d0
                      tx-start type=4  config=0x000001c9
                  cache-misses type=4  config=0x0000412e
                   tx-capacity type=4  config=0x00000254
                      el-abort type=4  config=0x000004c8
                   tx-conflict type=4  config=0x00000154
           branch-instructions type=4  config=0x000000c4
                    ref-cycles type=4  config=0x00000300
                     tx-commit type=4  config=0x000002c9
                    cpu-cycles type=4  config=0x0000003c
                  instructions type=4  config=0x000000c0
                 branch-misses type=4  config=0x000000c5
                      tx-abort type=4  config=0x000004c9
                      el-start type=4  config=0x000001c8
                      cycles-t type=4  config=0x10000003c
              cache-references type=4  config=0x00004f2e
         topdown-slots-retired type=4  config=0x000002c2
                    bus-cycles type=4  config=0x0000013c
                     cycles-ct type=4  config=0x30000003c
   uncore_cbox_2.clockticks    type=10 config=0x000000ff
                    data_reads type=7  config=0x00000001
                   data_writes type=7  config=0x00000002
   uncore_cbox_0.clockticks    type=8  config=0x000000ff
     cstate_core.c3-residency  type=14 config=0x00000001
     cstate_core.c6-residency  type=14 config=0x00000002
     cstate_core.c7-residency  type=14 config=0x00000003
                           smi type=6  config=0x00000004
                           tsc type=6  config=0x00000000
                         aperf type=6  config=0x00000001
                         mperf type=6  config=0x00000002