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| author | Madhavan Srinivasan <maddy@linux.vnet.ibm.com> | 2017-02-12 18:03:13 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-02-17 11:48:53 +0100 |
| commit | 8a088542c8f8d0bb458e4db2c01a2534f1adaf47 (patch) | |
| tree | bdadf0808c166621fa36338219b208f4c836b25d /arch/powerpc | |
| parent | powerpc/perf: Add alternative event table and function for power9 (diff) | |
| download | linux-8a088542c8f8d0bb458e4db2c01a2534f1adaf47.tar.xz linux-8a088542c8f8d0bb458e4db2c01a2534f1adaf47.zip | |
powerpc/perf: Use PM_INST_DISP for generic instructions sample
Since PM_INST_CMPL may not provide right counts in all
sampling scenarios in power9 DD1, instead use PM_INST_DISP.
Patch also update generic instruction sampling with the same.
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/perf/power9-pmu.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/arch/powerpc/perf/power9-pmu.c b/arch/powerpc/perf/power9-pmu.c index b38acff8a791..454e9f70894f 100644 --- a/arch/powerpc/perf/power9-pmu.c +++ b/arch/powerpc/perf/power9-pmu.c @@ -228,6 +228,17 @@ static const struct attribute_group *power9_pmu_attr_groups[] = { NULL, }; +static int power9_generic_events_dd1[] = { + [PERF_COUNT_HW_CPU_CYCLES] = PM_CYC, + [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = PM_ICT_NOSLOT_CYC, + [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = PM_CMPLU_STALL, + [PERF_COUNT_HW_INSTRUCTIONS] = PM_INST_DISP, + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = PM_BRU_CMPL, + [PERF_COUNT_HW_BRANCH_MISSES] = PM_BR_MPRED_CMPL, + [PERF_COUNT_HW_CACHE_REFERENCES] = PM_LD_REF_L1, + [PERF_COUNT_HW_CACHE_MISSES] = PM_LD_MISS_L1_FIN, +}; + static int power9_generic_events[] = { [PERF_COUNT_HW_CPU_CYCLES] = PM_CYC, [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = PM_ICT_NOSLOT_CYC, @@ -401,8 +412,8 @@ static struct power_pmu power9_isa207_pmu = { .get_alternatives = power9_get_alternatives, .disable_pmc = isa207_disable_pmc, .flags = PPMU_NO_SIAR | PPMU_ARCH_207S, - .n_generic = ARRAY_SIZE(power9_generic_events), - .generic_events = power9_generic_events, + .n_generic = ARRAY_SIZE(power9_generic_events_dd1), + .generic_events = power9_generic_events_dd1, .cache_events = &power9_cache_events, .attr_groups = power9_isa207_pmu_attr_groups, .bhrb_nr = 32, @@ -437,6 +448,11 @@ static int __init init_power9_pmu(void) return -ENODEV; if (cpu_has_feature(CPU_FTR_POWER9_DD1)) { + /* + * Since PM_INST_CMPL may not provide right counts in all + * sampling scenarios in power9 DD1, instead use PM_INST_DISP. + */ + EVENT_VAR(PM_INST_CMPL, _g).id = PM_INST_DISP; rc = register_power_pmu(&power9_isa207_pmu); } else { rc = register_power_pmu(&power9_pmu); |