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| author | Tom Zanussi <tzanussi@gmail.com> | 2010-05-01 10:41:20 +0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-05-02 20:36:56 +0400 |
| commit | 454c407ec17a0c63e4023ac0877d687945a7df4a (patch) | |
| tree | 1271299a59a89419c0dd4dcbf29b4492b63555ca /tools/perf/builtin.h | |
| parent | 789688faef5b3ba78065beaf2f3d6f1c839f74a3 (diff) | |
| download | linux-454c407ec17a0c63e4023ac0877d687945a7df4a.tar.xz | |
perf: add perf-inject builtin
Currently, perf 'live mode' writes build-ids at the end of the
session, which isn't actually useful for processing live mode events.
What would be better would be to have the build-ids sent before any of
the samples that reference them, which can be done by processing the
event stream and retrieving the build-ids on the first hit. Doing
that in perf-record itself, however, is off-limits.
This patch introduces perf-inject, which does the same job while
leaving perf-record untouched. Normal mode perf still records the
build-ids at the end of the session as it should, but for live mode,
perf-inject can be injected in between the record and report steps
e.g.:
perf record -o - ./hackbench 10 | perf inject -v -b | perf report -v -i -
perf-inject reads a perf-record event stream and repipes it to stdout.
At any point the processing code can inject other events into the
event stream - in this case build-ids (-b option) are read and
injected as needed into the event stream.
Build-ids are just the first user of perf-inject - potentially
anything that needs userspace processing to augment the trace stream
with additional information could make use of this facility.
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
LKML-Reference: <1272696080-16435-3-git-send-email-tzanussi@gmail.com>
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin.h')
| -rw-r--r-- | tools/perf/builtin.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h index 34a8a9ab9617..921245b28583 100644 --- a/tools/perf/builtin.h +++ b/tools/perf/builtin.h @@ -34,5 +34,6 @@ extern int cmd_kmem(int argc, const char **argv, const char *prefix); extern int cmd_lock(int argc, const char **argv, const char *prefix); extern int cmd_kvm(int argc, const char **argv, const char *prefix); extern int cmd_test(int argc, const char **argv, const char *prefix); +extern int cmd_inject(int argc, const char **argv, const char *prefix); #endif |