Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 03/16] perf evlist: Fix creation of cpu map | Date | Thu, 10 May 2012 14:17:32 -0300 |
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From: Namhyung Kim <namhyung.kim@lge.com>
Currently, 'perf record -- sleep 1' creates a cpu map for all online cpus since it turns out calling cpu_map__new(NULL). Fix it.
Also it is guaranteed that cpu_list is NULL if PID/TID is given by calling perf_target__validate(), so we can make the conditional bit simpler.
This also fixes perf test 7 (Validate) failure on my 6 core machine:
$ cat /sys/devices/system/cpu/online 0-11 $ ./perf test -v 7 7: Validate PERF_RECORD_* events & perf_sample fields: --- start --- perf_evlist__mmap: Operation not permitted ---- end ---- Validate PERF_RECORD_* events & perf_sample fields: FAILED!
Signed-off-by: Namhyung Kim <namhyung.kim@lge.com> Reviewed-by: David Ahern <dsahern@gmail.com> Cc: David Ahern <dsahern@gmail.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/1336367344-28071-3-git-send-email-namhyung.kim@lge.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/evlist.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 3032862..183b199 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -609,8 +609,9 @@ int perf_evlist__create_maps(struct perf_evlist *evlist, if (evlist->threads == NULL) return -1; - if (target->uid != UINT_MAX || - (target->cpu_list == NULL && target->tid)) + if (target->uid != UINT_MAX || target->tid) + evlist->cpus = cpu_map__dummy_new(); + else if (!target->system_wide && target->cpu_list == NULL) evlist->cpus = cpu_map__dummy_new(); else evlist->cpus = cpu_map__new(target->cpu_list); -- 1.7.9.2.358.g22243
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