Commit 785623ee authored by Ian Rogers's avatar Ian Rogers Committed by Arnaldo Carvalho de Melo
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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: default avatarKan Liang <kan.liang@linux.intel.com>
Signed-off-by: default avatarIan 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 97c48ea8

Documentation/ABI/testing/sysfs-bus-event_source-devices-events

+6 −0
Original line number Diff line number Diff line
@@ -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>]]...