diff options
| author | Ian Rogers <irogers@google.com> | 2024-05-02 14:35:03 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2024-05-03 17:08:20 -0300 |
| commit | 785623ee855e893da27d595cd7ca27bf03c13141 (patch) | |
| tree | 017e801be5951962c7fa2dddc832fe1600a68589 /Documentation/ABI | |
| parent | 97c48ea8ff1cd70f471aa9a225a0fa9dca95d223 (diff) | |
perf Document: Sysfs event names must be lower or upper case
To avoid directory scans in perf it is going to be assumed that sysfs
event names are either lower or upper case.
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Link: https://lore.kernel.org/r/20240502213507.2339733-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-event_source-devices-events | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events index 77de58d03822..e7efeab2ee83 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events @@ -37,6 +37,12 @@ Description: Per-pmu performance monitoring events specific to the running syste performance monitoring event supported by the <pmu>. The name of the file is the name of the event. + As performance monitoring event names are case + insensitive in the perf tool, the perf tool only looks + for lower or upper case event names in sysfs to avoid + scanning the directory. It is therefore required the + name of the event here is either lower or upper case. + File contents: <term>[=<value>][,<term>[=<value>]]... |