diff options
| author | Ravi Bangoria | 2025-04-29 03:59:37 +0000 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2025-04-29 22:30:46 -0300 |
| commit | fa1332a8011eebe1feefded19c94dcfdb22aacef (patch) | |
| tree | 79665768767c07493fbd52f7899526596fdee4b8 /tools/perf/util | |
| parent | fc481adc97f45328e242b6dba9fabd24f2082a6e (diff) | |
perf mem/c2c amd: Add ldlat support
'perf mem/c2c' uses IBS Op PMU on AMD platforms.
IBS Op PMU on Zen5 uarch has added support for Load Latency filtering.
Implement 'perf mem/c2c' --ldlat using IBS Op Load Latency filtering
capability.
Some subtle differences between AMD and other arch:
o --ldlat is disabled by default on AMD
o Supported values are 128 to 2048.
Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Ananth Narayan <ananth.narayan@amd.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Joe Mario <jmario@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Santosh Shukla <santosh.shukla@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20250429035938.1301-4-ravi.bangoria@amd.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
| -rw-r--r-- | tools/perf/util/pmu.c | 11 | ||||
| -rw-r--r-- | tools/perf/util/pmu.h | 2 |
2 files changed, 13 insertions, 0 deletions
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index bbb906bb2159..d08972aa461c 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -2259,6 +2259,17 @@ static void perf_pmu__del_caps(struct perf_pmu *pmu) } } +struct perf_pmu_caps *perf_pmu__get_cap(struct perf_pmu *pmu, const char *name) +{ + struct perf_pmu_caps *caps; + + list_for_each_entry(caps, &pmu->caps, list) { + if (!strcmp(caps->name, name)) + return caps; + } + return NULL; +} + /* * Reading/parsing the given pmu capabilities, which should be located at: * /sys/bus/event_source/devices/<dev>/caps as sysfs group attributes. diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h index 13dd3511f504..a1fdd6d50c53 100644 --- a/tools/perf/util/pmu.h +++ b/tools/perf/util/pmu.h @@ -277,6 +277,8 @@ bool pmu_uncore_identifier_match(const char *compat, const char *id); int perf_pmu__convert_scale(const char *scale, char **end, double *sval); +struct perf_pmu_caps *perf_pmu__get_cap(struct perf_pmu *pmu, const char *name); + int perf_pmu__caps_parse(struct perf_pmu *pmu); void perf_pmu__warn_invalid_config(struct perf_pmu *pmu, __u64 config, |