1. 15 Jul, 2020 17 commits
  2. 08 Jul, 2020 1 commit
    • Desnes A. Nunes do Rosario's avatar
      selftests/powerpc: Purge extra count_pmc() calls of ebb selftests · 3337bf41
      Desnes A. Nunes do Rosario authored
      An extra count on ebb_state.stats.pmc_count[PMC_INDEX(pmc)] is being per-
      formed when count_pmc() is used to reset PMCs on a few selftests. This
      extra pmc_count can occasionally invalidate results, such as the ones from
      cycles_test shown hereafter. The ebb_check_count() failed with an above
      the upper limit error due to the extra value on ebb_state.stats.pmc_count.
      
      Furthermore, this extra count is also indicated by extra PMC1 trace_log on
      the output of the cycle test (as well as on pmc56_overflow_test):
      
      ==========
         ...
         [21]: counter = 8
         [22]: register SPRN_MMCR0 = 0x0000000080000080
         [23]: register SPRN_PMC1  = 0x0000000080000004
         [24]: counter = 9
         [25]: register SPRN_MMCR0 = 0x0000000080000080
         [26]: register SPRN_PMC1  = 0x0000000080000004
         [27]: counter = 10
         [28]: register SPRN_MMCR0 = 0x0000000080000080
         [29]: register SPRN_PMC1  = 0x0000000080000004
      >> [30]: register SPRN_PMC1  = 0x000000004000051e
      PMC1 count (0x280000546) above upper limit 0x2800003e8 (+0x15e)
      [FAIL] Test FAILED on line 52
      failure: cycles
      ==========
      Signed-off-by: default avatarDesnes A. Nunes do Rosario <desnesn@linux.ibm.com>
      Tested-by: default avatarSachin Sant <sachinp@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Link: https://lore.kernel.org/r/20200626164737.21943-1-desnesn@linux.ibm.com
      3337bf41
  3. 06 Jul, 2020 1 commit
  4. 30 Jun, 2020 5 commits
  5. 22 Jun, 2020 16 commits