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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-01-09 23:26:26 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-01-11 22:48:01 +0300 |
| commit | 017037ff3d0b11842012878a546fe2df47822259 (patch) | |
| tree | 65a9229dc35ac8f4097a8ac448da5b3fad7e8c0c /tools/perf/Documentation | |
| parent | 355637717d575f14169954c3ed31536d45778f08 (diff) | |
| download | linux-017037ff3d0b11842012878a546fe2df47822259.tar.xz | |
perf trace: Allow specifying list of syscalls and events in -e/--expr/--event
Makes it easier to specify both events and syscalls (to be formatter
strace-like), i.e. previously one would have to do:
# perf trace -e nanosleep --event sched:sched_switch usleep 1
Now it is possible to do:
# perf trace -e nanosleep,sched:sched_switch usleep 1
0.000 ( 0.021 ms): usleep/17962 nanosleep(rqtp: 0x7ffdedd61ec0) ...
0.021 ( ): sched:sched_switch:usleep:17962 [120] S ==> swapper/1:0 [120])
0.000 ( 0.066 ms): usleep/17962 ... [continued]: nanosleep()) = 0
#
The old style --expr and using both -e and --event continues to work.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-ieg6bakub4657l9e6afn85r4@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-trace.txt | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt index 781b019751a4..afd728672b6f 100644 --- a/tools/perf/Documentation/perf-trace.txt +++ b/tools/perf/Documentation/perf-trace.txt @@ -35,7 +35,10 @@ OPTIONS -e:: --expr:: - List of syscalls to show, currently only syscall names. +--event:: + List of syscalls and other perf events (tracepoints, HW cache events, + etc) to show. + See 'perf list' for a complete list of events. Prefixing with ! shows all syscalls but the ones specified. You may need to escape it. @@ -135,9 +138,6 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs. --kernel-syscall-graph:: Show the kernel callchains on the syscall exit path. ---event:: - Trace other events, see 'perf list' for a complete list. - --max-stack:: Set the stack depth limit when parsing the callchain, anything beyond the specified depth will be ignored. Note that at this point |