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authorJiri Olsa <jolsa@kernel.org>2015-10-05 21:06:05 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-10-05 22:21:11 +0300
commit7f94af7a489fada17d28cc60e8f4409ce216bd6d (patch)
treeb01ac1104e90dab6b9e8d657658d68dac4b873b7 /tools/perf/util/evsel.h
parent45cf6c33f95448752dd3d5531388429c3a5012d0 (diff)
downloadlinux-7f94af7a489fada17d28cc60e8f4409ce216bd6d.tar.xz
perf tools: Introduce 'P' modifier to request max precision
The 'P' will cause the event to get maximum possible detected precise level. Following record: $ perf record -e cycles:P ... will detect maximum precise level for 'cycles' event and use it. Commiter note: Testing it: $ perf record -e cycles:P usleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.013 MB perf.data (9 samples) ] $ perf evlist cycles:P $ perf evlist -v cycles:P: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, enable_on_exec: 1, task: 1, precise_ip: 2, sample_id_all: 1, mmap2: 1, comm_exec: 1 $ Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1444068369-20978-6-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evsel.h')
-rw-r--r--tools/perf/util/evsel.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 7906666580da..02a5fed8d924 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -111,6 +111,7 @@ struct perf_evsel {
bool system_wide;
bool tracking;
bool per_pkg;
+ bool precise_max;
/* parse modifier helper */
int exclude_GH;
int nr_members;