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authorAdrian Hunter <adrian.hunter@intel.com>2015-07-21 12:44:04 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-07-23 22:51:13 -0300
commitb757bb09134f479a087ece08d2cd2a6ba31c9210 (patch)
tree43c27fd49ea428f2e62c62c93040c7cdf3cc13fc /tools/perf/builtin-record.c
parent0286039f777ec0b6684868c34f7b16f97a069d6e (diff)
downloadlinux-b757bb09134f479a087ece08d2cd2a6ba31c9210.tar.gz
perf record: Add option --switch-events to select PERF_RECORD_SWITCH events
Add an option to select PERF_RECORD_SWITCH events. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1437471846-26995-4-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-record.c')
-rw-r--r--tools/perf/builtin-record.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 1932e27c00d8..445a64d19625 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1075,6 +1075,8 @@ struct option __record_options[] = {
"opts", "AUX area tracing Snapshot Mode", ""),
OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout,
"per thread proc mmap processing timeout in ms"),
+ OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events,
+ "Record context switch events"),
OPT_END()
};
@@ -1102,6 +1104,11 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
" system-wide mode\n");
usage_with_options(record_usage, record_options);
}
+ if (rec->opts.record_switch_events &&
+ !perf_can_record_switch_events()) {
+ ui__error("kernel does not support recording context switch events (--switch-events option)\n");
+ usage_with_options(record_usage, record_options);
+ }
if (!rec->itr) {
rec->itr = auxtrace_record__init(rec->evlist, &err);