Messages in this thread Patch in this message | | | From | kan.liang@linux ... | Subject | [PATCH] perf/x86/intel: Add Tremont Topdown support | Date | Tue, 8 Dec 2020 12:05:52 -0800 |
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From: Kan Liang <kan.liang@linux.intel.com>
Tremont has four L1 Topdown events, TOPDOWN_FE_BOUND.ALL, TOPDOWN_BAD_SPECULATION.ALL, TOPDOWN_BE_BOUND.ALL and TOPDOWN_RETIRING.ALL. They are available on GP counters.
Export them to sysfs and facilitate the perf stat tool.
$perf stat --topdown -- sleep 1
Performance counter stats for 'sleep 1':
retiring bad speculation frontend bound backend bound 24.9% 16.8% 31.7% 26.6%
1.001224610 seconds time elapsed
0.001150000 seconds user 0.000000000 seconds sys
Signed-off-by: Kan Liang <kan.liang@linux.intel.com> --- arch/x86/events/intel/core.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index 546cc89..2239b22 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -1901,6 +1901,19 @@ static __initconst const u64 tnt_hw_cache_extra_regs }, }; +EVENT_ATTR_STR(topdown-fe-bound, td_fe_bound_tnt, "event=0x71,umask=0x0"); +EVENT_ATTR_STR(topdown-retiring, td_retiring_tnt, "event=0xc2,umask=0x0"); +EVENT_ATTR_STR(topdown-bad-spec, td_bad_spec_tnt, "event=0x73,umask=0x6"); +EVENT_ATTR_STR(topdown-be-bound, td_be_bound_tnt, "event=0x74,umask=0x0"); + +static struct attribute *tnt_events_attrs[] = { + EVENT_PTR(td_fe_bound_tnt), + EVENT_PTR(td_retiring_tnt), + EVENT_PTR(td_bad_spec_tnt), + EVENT_PTR(td_be_bound_tnt), + NULL, +}; + static struct extra_reg intel_tnt_extra_regs[] __read_mostly = { /* must define OFFCORE_RSP_X first, see intel_fixup_er() */ INTEL_UEVENT_EXTRA_REG(0x01b7, MSR_OFFCORE_RSP_0, 0x800ff0ffffff9fffull, RSP_0), @@ -5174,6 +5187,7 @@ __init int intel_pmu_init(void) x86_pmu.lbr_pt_coexist = true; x86_pmu.flags |= PMU_FL_HAS_RSP_1; x86_pmu.get_event_constraints = tnt_get_event_constraints; + td_attr = tnt_events_attrs; extra_attr = slm_format_attr; pr_cont("Tremont events, "); name = "Tremont"; -- 2.7.4
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