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authorAdrian Hunter <adrian.hunter@intel.com>2013-11-01 17:51:34 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-11-14 23:10:27 +0400
commit539e6bb71e350541105e67e3d6c31392d9da25ef (patch)
tree28f5b908b42bee694cddad30d2fc1f15c66315e6 /tools/perf/util/evlist.c
parent35e17b2450e09968f9702d4048c228199af171bc (diff)
downloadlinux-539e6bb71e350541105e67e3d6c31392d9da25ef.tar.xz
perf record: Add an option to force per-cpu mmaps
By default, when tasks are specified (i.e. -p, -t or -u options) per-thread mmaps are created. Add an option to override that and force per-cpu mmaps. Further comments by peterz: So this option allows -t/-p/-u to create one buffer per cpu and attach all the various thread/process/user tasks' their counters to that one buffer? As opposed to the current state where each such counter would have its own buffer. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Tested-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1383313899-15987-7-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evlist.c')
-rw-r--r--tools/perf/util/evlist.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 5ce2ace2d6c1..bbc746aa5716 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -819,7 +819,9 @@ int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target)
if (evlist->threads == NULL)
return -1;
- if (target__has_task(target))
+ if (target->force_per_cpu)
+ evlist->cpus = cpu_map__new(target->cpu_list);
+ else if (target__has_task(target))
evlist->cpus = cpu_map__dummy_new();
else if (!target__has_cpu(target) && !target->uses_mmap)
evlist->cpus = cpu_map__dummy_new();