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| author | Arnaldo Carvalho de Melo <acme@kernel.org> | 2023-11-07 11:33:31 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-11-10 14:31:13 +0300 |
| commit | dd678532f913c1a742f1a2add6adacfb7ae2b166 (patch) | |
| tree | 0ce37cbb002e26da31b62c850384d098402914cb /tools/perf/util/env.c | |
| parent | a399ee6773d6a0203f9bd764f8bd9d978878cef1 (diff) | |
| download | linux-dd678532f913c1a742f1a2add6adacfb7ae2b166.tar.xz | |
perf header: Additional note on AMD IBS for max_precise pmu cap
x86 core PMU exposes supported maximum precision level via max_precise
PMU capability. Although, AMD core PMU does not support precise mode,
certain core PMU events with precise_ip > 0 are allowed and forwarded to
IBS OP PMU.
Display a note about this in the 'perf report' header output and
document the details in the perf-list man page.
Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ananth Narayan <ananth.narayan@amd.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kim Phillips <kim.phillips@amd.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ming Wang <wangming01@loongson.cn>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ross Zwisler <zwisler@chromium.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Santosh Shukla <santosh.shukla@amd.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Link: https://lore.kernel.org/r/20231107083331.901-2-ravi.bangoria@amd.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/env.c')
| -rw-r--r-- | tools/perf/util/env.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c index 44140b7f596a..cbc18b22ace5 100644 --- a/tools/perf/util/env.c +++ b/tools/perf/util/env.c @@ -531,6 +531,24 @@ int perf_env__numa_node(struct perf_env *env, struct perf_cpu cpu) return cpu.cpu >= 0 && cpu.cpu < env->nr_numa_map ? env->numa_map[cpu.cpu] : -1; } +bool perf_env__has_pmu_mapping(struct perf_env *env, const char *pmu_name) +{ + char *pmu_mapping = env->pmu_mappings, *colon; + + for (int i = 0; i < env->nr_pmu_mappings; ++i) { + if (strtoul(pmu_mapping, &colon, 0) == ULONG_MAX || *colon != ':') + goto out_error; + + pmu_mapping = colon + 1; + if (strcmp(pmu_mapping, pmu_name) == 0) + return true; + + pmu_mapping += strlen(pmu_mapping) + 1; + } +out_error: + return false; +} + char *perf_env__find_pmu_cap(struct perf_env *env, const char *pmu_name, const char *cap) { |