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| author | Ravi Bangoria <ravi.bangoria@amd.com> | 2022-10-06 21:09:42 +0530 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-10-06 16:29:32 -0300 |
| commit | 4173cc055dc92f199a43775775e54dc7fafd37b6 (patch) | |
| tree | 614cc01080453fa32045f8d4d253973bf71c5145 /tools/perf | |
| parent | 923396f6827d00ef18c1bf589551e5a604191261 (diff) | |
| download | linux-starfive-4173cc055dc92f199a43775775e54dc7fafd37b6.tar.gz linux-starfive-4173cc055dc92f199a43775775e54dc7fafd37b6.tar.bz2 linux-starfive-4173cc055dc92f199a43775775e54dc7fafd37b6.zip | |
perf mem/c2c: Set PERF_SAMPLE_WEIGHT for LOAD_STORE events
Currently perf sets PERF_SAMPLE_WEIGHT flag only for mem load events.
Set it for combined load-store event as well which will enable recording
of load latency by default on arch that does not support independent
mem load event.
Also document missing -W in perf-record man page.
Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ali Saidi <alisaidi@amazon.com>
Cc: Ananth Narayan <ananth.narayan@amd.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kim Phillips <kim.phillips@amd.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.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>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org
Link: https://lore.kernel.org/r/20221006153946.7816-5-ravi.bangoria@amd.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 1 | ||||
| -rw-r--r-- | tools/perf/builtin-c2c.c | 1 | ||||
| -rw-r--r-- | tools/perf/builtin-mem.c | 1 |
3 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 378f497f4be3..e41ae950fdc3 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -411,6 +411,7 @@ is enabled for all the sampling events. The sampled branch type is the same for The various filters must be specified as a comma separated list: --branch-filter any_ret,u,k Note that this feature may not be available on all processors. +-W:: --weight:: Enable weightened sampling. An additional weight is recorded per sample and can be displayed with the weight and local_weight sort keys. This currently works for TSX diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c index f35a47b2dbe4..a9190458d2d5 100644 --- a/tools/perf/builtin-c2c.c +++ b/tools/perf/builtin-c2c.c @@ -3281,6 +3281,7 @@ static int perf_c2c__record(int argc, const char **argv) */ if (e->tag) { e->record = true; + rec_argv[i++] = "-W"; } else { e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD); e->record = true; diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c index 9e435fd23503..f7dd8216de72 100644 --- a/tools/perf/builtin-mem.c +++ b/tools/perf/builtin-mem.c @@ -122,6 +122,7 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem) (mem->operation & MEM_OPERATION_LOAD) && (mem->operation & MEM_OPERATION_STORE)) { e->record = true; + rec_argv[i++] = "-W"; } else { if (mem->operation & MEM_OPERATION_LOAD) { e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD); |