Commit-ID: 09f1985404aa99b9d1ad435fcb0dabd20d4ed498 Gitweb: http://git.kernel.org/tip/09f1985404aa99b9d1ad435fcb0dabd20d4ed498 Author: Namhyung Kim <namhyung@xxxxxxxxxx> AuthorDate: Mon, 11 Jan 2016 19:35:10 +0900 Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> CommitDate: Tue, 12 Jan 2016 12:42:07 -0300 perf tools: Add more usage tips Thanks to Andi Kleen for providing useful tips. Suggested-by: Andi Kleen <andi@xxxxxxxxxxxxxx> Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx> Cc: Andi Kleen <andi@xxxxxxxxxxxxxx> Cc: Brendan Gregg <brendan.d.gregg@xxxxxxxxx> Cc: David Ahern <dsahern@xxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Wang Nan <wangnan0@xxxxxxxxxx> Link: http://lkml.kernel.org/r/1452508510-28316-1-git-send-email-namhyung@xxxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> --- tools/perf/Documentation/tips.txt | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/tools/perf/Documentation/tips.txt b/tools/perf/Documentation/tips.txt index a1c10e3..e0ce957 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> To see list of saved events and attributes: perf evlist -v Use --symfs <dir> if your symbol files are in non-standard locations To see callchains in a more compact form: perf report -g folded +Show individual samples with: perf script +Limit to show entries above 5% only: perf report --percent-limit 5 +Profiling branch (mis)predictions with: perf record -b / perf report +Treat branches as callchains: perf report --branch-history +To count events in every 1000 msec: perf stat -I 1000 +Print event counts in CSV format with: perf stat -x, +If you have debuginfo enabled, try: perf report -s sym,srcline +For memory address profiling, try: perf mem record / perf mem report +For tracepoint events, try: perf report -s trace_fields +To record callchains for each sample: perf record -g +To record every process run by an user: perf record -u <user> +Skip collecing build-id when recording: perf record -B +To change sampling frequency to 100 Hz: perf record -F 100 +See assembly instructions with percentage: perf annotate <symbol> +If you prefer Intel style assembly, try: perf annotate -M intel -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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