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perf evlist: Fix creation of cpu map

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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 <[email protected]>
Reviewed-by: David Ahern <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Namhyung Kim authored and Arnaldo Carvalho de Melo committed 2012-05-07 16:46:21 -03:00
1 parent 10b47d5415
commit 55261f4670
1 file changed
+3 -2
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tools/perf/util/evlist.c
+3 -2
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@@ -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);