diff options
Diffstat (limited to 'tools')
| -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 ------- |