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| author | Dmitry Vyukov <dvyukov@google.com> | 2025-02-13 10:08:19 +0100 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2025-02-18 14:04:32 -0800 |
| commit | 2570c02c3a5a8b27e2e14cd205ccb796e01f3308 (patch) | |
| tree | efb670724e91bc73a86b8c9af16ffd3a2f032b18 /tools/perf/Documentation | |
| parent | ee1cffbe24e7dc129c737a5f433b35e2ce0bdd78 (diff) | |
| download | linux-next-2570c02c3a5a8b27e2e14cd205ccb796e01f3308.tar.gz linux-next-2570c02c3a5a8b27e2e14cd205ccb796e01f3308.zip | |
perf report: Add --latency flag
Add record/report --latency flag that allows to capture and show
latency-centric profiles rather than the default CPU-consumption-centric
profiles. For latency profiles record captures context switch events,
and report shows Latency as the first column.
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Link: https://lore.kernel.org/r/e9640464bcbc47dde2cb557003f421052ebc9eec.1739437531.git.dvyukov@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 4 | ||||
| -rw-r--r-- | tools/perf/Documentation/perf-report.txt | 5 |
2 files changed, 9 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 80686d590de2..c7fc1ba265e2 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -227,6 +227,10 @@ OPTIONS '--filter' exists, the new filter expression will be combined with them by '&&'. +--latency:: + Enable data collection for latency profiling. + Use perf report --latency for latency-centric profile. + -a:: --all-cpus:: System-wide collection from all CPUs (default if no target is specified). diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index 87f864519406..66794131aec4 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -68,6 +68,11 @@ OPTIONS --hide-unresolved:: Only display entries resolved to a symbol. +--latency:: + Show latency-centric profile rather than the default + CPU-consumption-centric profile + (requires perf record --latency flag). + -s:: --sort=:: Sort histogram entries by given key(s) - multiple keys can be specified |