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perf tools: Ensure single disable call per event in record comand

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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 <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Cc: Corey Ashford <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Jiri Olsa 2012-11-12 18:34:02 +01:00 • committed by Arnaldo Carvalho de Melo
commit 2711926a41
1 changed files with 4 additions and 1 deletions
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5
tools/perf/builtin-record.c
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@ -502,6 +502,7 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
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 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
* 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)