diff options
author | Namhyung Kim <namhyung@kernel.org> | 2016-01-11 05:35:10 -0500 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-01-12 10:42:07 -0500 |
commit | 09f1985404aa99b9d1ad435fcb0dabd20d4ed498 (patch) | |
tree | fd38588cac56184d3048a8c1b544002923d574ac /tools | |
parent | 6156681b73f2fffe56493e9a50518c0cbfcd8ba3 (diff) |
perf tools: Add more usage tips
Thanks to Andi Kleen for providing useful tips.
Suggested-by: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1452508510-28316-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r-- | tools/perf/Documentation/tips.txt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tools/perf/Documentation/tips.txt b/tools/perf/Documentation/tips.txt index a1c10e360db5..e0ce9573b79b 100644 --- a/tools/perf/Documentation/tips.txt +++ b/tools/perf/Documentation/tips.txt | |||
@@ -12,3 +12,18 @@ List events using substring match: perf list <keyword> | |||
12 | To see list of saved events and attributes: perf evlist -v | 12 | To see list of saved events and attributes: perf evlist -v |
13 | Use --symfs <dir> if your symbol files are in non-standard locations | 13 | Use --symfs <dir> if your symbol files are in non-standard locations |
14 | To see callchains in a more compact form: perf report -g folded | 14 | To see callchains in a more compact form: perf report -g folded |
15 | Show individual samples with: perf script | ||
16 | Limit to show entries above 5% only: perf report --percent-limit 5 | ||
17 | Profiling branch (mis)predictions with: perf record -b / perf report | ||
18 | Treat branches as callchains: perf report --branch-history | ||
19 | To count events in every 1000 msec: perf stat -I 1000 | ||
20 | Print event counts in CSV format with: perf stat -x, | ||
21 | If you have debuginfo enabled, try: perf report -s sym,srcline | ||
22 | For memory address profiling, try: perf mem record / perf mem report | ||
23 | For tracepoint events, try: perf report -s trace_fields | ||
24 | To record callchains for each sample: perf record -g | ||
25 | To record every process run by an user: perf record -u <user> | ||
26 | Skip collecing build-id when recording: perf record -B | ||
27 | To change sampling frequency to 100 Hz: perf record -F 100 | ||
28 | See assembly instructions with percentage: perf annotate <symbol> | ||
29 | If you prefer Intel style assembly, try: perf annotate -M intel | ||