perf mem: Search event name with more flexible path
authorLeo Yan <leo.yan@linaro.org>
Fri, 6 Nov 2020 09:48:45 +0000 (17:48 +0800)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 11 Nov 2020 13:28:12 +0000 (10:28 -0300)
commitf9f16dfbe76e63ba9aec68055c08242b09be297e
tree95fe5549e6a6dd79ea1c36dbe82b07e3c9083b7d
parent644bf4b0f7acde641d3db200b4db66977e96c3bd
perf mem: Search event name with more flexible path

The perf tool searches a memory event name under the folder
'/sys/devices/cpu/events/', this leads to the limitation for the
selection of a memory profiling event which must be under this folder.

Thus it's impossible to use any other event as memory event which is not
under this specific folder, e.g. Arm SPE hardware event is not located
in '/sys/devices/cpu/events/' so it cannot be enabled for memory
profiling.

This patch changes to search folder from '/sys/devices/cpu/events/' to
'/sys/devices', so it give flexibility to find events which can be used
for memory profiling.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20201106094853.21082-2-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/mem-events.c