perf tools: Ensure single disable call per event in record comand
It's possible we issue the event disable ioctl multiple times until we
read the final portion of the mmap buffer.
Ensuring just single disable ioctl call for event, because there's no
need to do that more than once.
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1352741644-16809-4-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 268b356..f3151d3 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -502,6 +502,7 @@
struct perf_evlist *evsel_list = rec->evlist;
const char *output_name = rec->output_name;
struct perf_session *session;
+ bool disabled = false;
rec->progname = argv[0];
@@ -735,8 +736,10 @@
* die with the process and we wait for that. Thus no need to
* disable events in this case.
*/
- if (done && !perf_target__none(&opts->target))
+ if (done && !disabled && !perf_target__none(&opts->target)) {
perf_evlist__disable(evsel_list);
+ disabled = true;
+ }
}
if (quiet || signr == SIGUSR1)