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| author |   Ian Rogers <irogers@google.com> | 2025-07-18 20:05:07 -0700 |
|---|---|---|
| committer |   Namhyung Kim <namhyung@kernel.org> | 2025-07-24 13:41:35 -0700 |
| commit | 175c852325a1f566426e2470e5d5d67efc7621dd (patch) | |
| tree | dce45d5597579302daf7ef0dd8bf2c64d9d7c513 /scripts/basic/git:/ssh:/git@git.zx2c4.com | |
| parent | perf parse-events: Allow the cpu term to be a PMU or CPU range (diff) | |
| download | wireguard-linux-175c852325a1f566426e2470e5d5d67efc7621dd.tar.xz wireguard-linux-175c852325a1f566426e2470e5d5d67efc7621dd.zip | |
perf tool_pmu: Allow num_cpus(_online) to be specific to a cpumask
For hybrid metrics it is useful to know the number of p-core or e-core
CPUs. If a cpumask is specified for the num_cpus or num_cpus_online
tool events, compute the value relative to the given mask rather than
for the full system.
```
$ sudo /tmp/perf/perf stat -e 'tool/num_cpus/,tool/num_cpus,cpu=cpu_core/,
tool/num_cpus,cpu=cpu_atom/,tool/num_cpus_online/,tool/num_cpus_online,
cpu=cpu_core/,tool/num_cpus_online,cpu=cpu_atom/' true
Performance counter stats for 'true':
28 tool/num_cpus/
16 tool/num_cpus,cpu=cpu_core/
12 tool/num_cpus,cpu=cpu_atom/
28 tool/num_cpus_online/
16 tool/num_cpus_online,cpu=cpu_core/
12 tool/num_cpus_online,cpu=cpu_atom/
0.000767205 seconds time elapsed
0.000938000 seconds user
0.000000000 seconds sys
```
Reviewed-by: Thomas Falcon <thomas.falcon@intel.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: James Clark <james.clark@linaro.org>
Link: https://lore.kernel.org/r/20250719030517.1990983-6-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'scripts/basic/git:/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions