diff options
| author | Kan Liang <kan.liang@linux.intel.com> | 2023-09-11 17:41:38 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-09-12 09:22:24 +0300 |
| commit | ffbe4ab0beda55b5c467aa3d95ca14db75a84717 (patch) | |
| tree | 058c6aea1064ad6be1dd0cf1360891fdea8acbf1 /arch/x86/events | |
| parent | 950ecdc672aec9cd29036b2e2535b07c103af494 (diff) | |
| download | linux-ffbe4ab0beda55b5c467aa3d95ca14db75a84717.tar.xz | |
perf/x86/intel: Extend the ref-cycles event to GP counters
The current ref-cycles event is only available on the fixed counter 2.
Starting from the GLC and GRT core, the architectural UnHalted Reference
Cycles event (0x013c) which is available on general-purpose counters
can collect the exact same events as the fixed counter 2.
Update the mapping of ref-cycles to 0x013c. So the ref-cycles can be
available on both fixed counter 2 and general-purpose counters.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230911144139.2354015-1-kan.liang@linux.intel.com
Diffstat (limited to 'arch/x86/events')
| -rw-r--r-- | arch/x86/events/intel/core.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index e1543d6dc48a..a08f794a0e79 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -211,6 +211,14 @@ static struct event_constraint intel_slm_event_constraints[] __read_mostly = EVENT_CONSTRAINT_END }; +static struct event_constraint intel_grt_event_constraints[] __read_mostly = { + FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */ + FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */ + FIXED_EVENT_CONSTRAINT(0x0300, 2), /* pseudo CPU_CLK_UNHALTED.REF */ + FIXED_EVENT_CONSTRAINT(0x013c, 2), /* CPU_CLK_UNHALTED.REF_TSC_P */ + EVENT_CONSTRAINT_END +}; + static struct event_constraint intel_skl_event_constraints[] = { FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */ FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */ @@ -314,6 +322,7 @@ static struct event_constraint intel_glc_event_constraints[] = { FIXED_EVENT_CONSTRAINT(0x0100, 0), /* INST_RETIRED.PREC_DIST */ FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */ FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */ + FIXED_EVENT_CONSTRAINT(0x013c, 2), /* CPU_CLK_UNHALTED.REF_TSC_P */ FIXED_EVENT_CONSTRAINT(0x0400, 3), /* SLOTS */ METRIC_EVENT_CONSTRAINT(INTEL_TD_METRIC_RETIRING, 0), METRIC_EVENT_CONSTRAINT(INTEL_TD_METRIC_BAD_SPEC, 1), @@ -5983,6 +5992,12 @@ static __always_inline int intel_pmu_init_hybrid(enum hybrid_pmu_type pmus) return 0; } +static __always_inline void intel_pmu_ref_cycles_ext(void) +{ + if (!(x86_pmu.events_maskl & (INTEL_PMC_MSK_FIXED_REF_CYCLES >> INTEL_PMC_IDX_FIXED))) + intel_perfmon_event_map[PERF_COUNT_HW_REF_CPU_CYCLES] = 0x013c; +} + static __always_inline void intel_pmu_init_glc(struct pmu *pmu) { x86_pmu.late_ack = true; @@ -6005,6 +6020,8 @@ static __always_inline void intel_pmu_init_glc(struct pmu *pmu) memcpy(hybrid_var(pmu, hw_cache_extra_regs), glc_hw_cache_extra_regs, sizeof(hw_cache_extra_regs)); hybrid(pmu, event_constraints) = intel_glc_event_constraints; hybrid(pmu, pebs_constraints) = intel_glc_pebs_event_constraints; + + intel_pmu_ref_cycles_ext(); } static __always_inline void intel_pmu_init_grt(struct pmu *pmu) @@ -6021,9 +6038,11 @@ static __always_inline void intel_pmu_init_grt(struct pmu *pmu) memcpy(hybrid_var(pmu, hw_cache_event_ids), glp_hw_cache_event_ids, sizeof(hw_cache_event_ids)); memcpy(hybrid_var(pmu, hw_cache_extra_regs), tnt_hw_cache_extra_regs, sizeof(hw_cache_extra_regs)); hybrid_var(pmu, hw_cache_event_ids)[C(ITLB)][C(OP_READ)][C(RESULT_ACCESS)] = -1; - hybrid(pmu, event_constraints) = intel_slm_event_constraints; + hybrid(pmu, event_constraints) = intel_grt_event_constraints; hybrid(pmu, pebs_constraints) = intel_grt_pebs_event_constraints; hybrid(pmu, extra_regs) = intel_grt_extra_regs; + + intel_pmu_ref_cycles_ext(); } __init int intel_pmu_init(void) |