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| author | Ian Rogers <irogers@google.com> | 2024-11-09 01:37:59 +0100 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2024-11-09 17:28:03 +0100 |
| commit | 6d5d90a6abb98ecd964cd213db7e75a6fa5ff518 (patch) | |
| tree | d13365363e3662bb6f9f669f9c9c5b7921db8ed6 | |
| parent | perf test: Add hwmon "PMU" test (diff) | |
| download | linux-6d5d90a6abb98ecd964cd213db7e75a6fa5ff518.tar.xz linux-6d5d90a6abb98ecd964cd213db7e75a6fa5ff518.zip | |
perf docs: Document tool and hwmon events
Add a few paragraphs on tool and hwmon events.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Yoshihiro Furudera <fj5100bi@fujitsu.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ze Gao <zegao2021@gmail.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Junhao He <hejunhao3@huawei.com>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Link: https://lore.kernel.org/r/20241109003759.473460-8-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
| -rw-r--r-- | tools/perf/Documentation/perf-list.txt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt index 14621f39b375..d0c65fad419a 100644 --- a/tools/perf/Documentation/perf-list.txt +++ b/tools/perf/Documentation/perf-list.txt @@ -243,6 +243,21 @@ For accessing trace point events perf needs to have read access to /sys/kernel/tracing, even when perf_event_paranoid is in a relaxed setting. +TOOL/HWMON EVENTS +----------------- + +Some events don't have an associated PMU instead reading values +available to software without perf_event_open. As these events don't +support sampling they can only really be read by tools like perf stat. + +Tool events provide times and certain system parameters. Examples +include duration_time, user_time, system_time and num_cpus_online. + +Hwmon events provide easy access to hwmon sysfs data typically in +/sys/class/hwmon. This information includes temperatures, fan speeds +and energy usage. + + TRACING ------- |