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perf target: Add uses_mmap field

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If perf doesn't mmap on event (like perf stat), it should not create
per-task-per-cpu events. So just use a dummy cpu map to create a
per-task event for this case.

Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1337161549-9870-3-git-send-email-namhyung.kim@lge.com
[ committer note: renamed .need_mmap to .uses_mmap ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2012-05-16 18:45:49 +09:00
committed by Arnaldo Carvalho de Melo
parent 879d77d0cb
commit d1cb9fce92
5 changed files with 10 additions and 0 deletions
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tools/perf/util/evlist.c
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@@ -611,6 +611,8 @@ int perf_evlist__create_maps(struct perf_evlist *evlist,
if (perf_target__has_task(target))
evlist->cpus = cpu_map__dummy_new();
else if (!perf_target__has_cpu(target) && !target->uses_mmap)
evlist->cpus = cpu_map__dummy_new();
else
evlist->cpus = cpu_map__new(target->cpu_list);