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perf c2c: Support memory event PERF_MEM_EVENTS__LOAD_STORE 

When user doesn't specify event name, perf c2c tool enables both the
load and store events, and this leads to failure for opening the
duplicate PMU device for AUX trace.

After the memory event PERF_MEM_EVENTS__LOAD_STORE is introduced, when
the user doesn't specify event name, this patch converts the required
operation to PERF_MEM_EVENTS__LOAD_STORE if the arch supports it.
Otherwise, the tool still rolls back to enable events
PERF_MEM_EVENTS__LOAD and PERF_MEM_EVENTS__STORE.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20201106094853.21082-5-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Leo Yan 2020-11-06 17:48:48 +08:00 committed by Arnaldo Carvalho de Melo
parent 4ba2452cd8
commit 8b8173b45a
1 changed files with 13 additions and 4 deletions
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17
tools/perf/builtin-c2c.c
View File

@ -2895,11 +2895,20 @@ static int perf_c2c__record(int argc, const char **argv)
rec_argv[i++] = "record";
if (!event_set) {
e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD);
e->record = true;
e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD_STORE);
/*
* The load and store operations are required, use the event
* PERF_MEM_EVENTS__LOAD_STORE if it is supported.
*/
if (e->tag) {
e->record = true;
} else {
e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD);
e->record = true;
e = perf_mem_events__ptr(PERF_MEM_EVENTS__STORE);
e->record = true;
e = perf_mem_events__ptr(PERF_MEM_EVENTS__STORE);
e->record = true;
}
}
e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD);