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authorJin Yao <yao.jin@linux.intel.com>2018-02-12 23:32:36 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-02-16 20:55:40 +0300
commit147c508f3004df6e2958f6c8867909531c2a15e2 (patch)
tree8c9c11681b06d493714e93f092e534ec071152a8 /tools/perf/util/thread_map.h
parent099c1130998fd2234a200b55d69713ec66d88325 (diff)
downloadlinux-147c508f3004df6e2958f6c8867909531c2a15e2.tar.xz
perf tools: Use target->per_thread and target->system_wide flags
Mathieu Poirier reports issue in commit ("73c0ca1eee3d perf thread_map: Enumerate all threads from /proc") that it has negative impact on 'perf record --per-thread'. It has the effect of creating a kernel event for each thread in the system for 'perf record --per-thread'. Mathieu Poirier's patch ("perf util: Do not reuse target->per_thread flag") can fix this issue by creating a new target->all_threads flag. This patch is based on Mathieu Poirier's patch but it doesn't use a new target->all_threads flag. This patch just uses 'target->per_thread && target->system_wide' as a condition to check for all threads case. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-arm-kernel@lists.infradead.org Fixes: 73c0ca1eee3d ("perf thread_map: Enumerate all threads from /proc") Link: http://lkml.kernel.org/r/1518467557-18505-3-git-send-email-mathieu.poirier@linaro.org Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> [Fixed checkpatch warning about line over 80 characters] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/thread_map.h')
-rw-r--r--tools/perf/util/thread_map.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/thread_map.h b/tools/perf/util/thread_map.h
index 0a806b99e73c..5ec91cfd1869 100644
--- a/tools/perf/util/thread_map.h
+++ b/tools/perf/util/thread_map.h
@@ -31,7 +31,7 @@ struct thread_map *thread_map__get(struct thread_map *map);
void thread_map__put(struct thread_map *map);
struct thread_map *thread_map__new_str(const char *pid,
- const char *tid, uid_t uid, bool per_thread);
+ const char *tid, uid_t uid, bool all_threads);
struct thread_map *thread_map__new_by_tid_str(const char *tid_str);