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perf/x86/intel: Add Tremont Topdown support

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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>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/1607457952-3519-1-git-send-email-kan.liang@linux.intel.com
This commit is contained in:
Kan Liang 2020-12-08 12:05:52 -08:00 committed by Peter Zijlstra
parent bd11952b40
commit c2208046bb
1 changed files with 14 additions and 0 deletions
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14
arch/x86/events/intel/core.c
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@ -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";