linux-kernel - [PATCH v12 07/15] perf stat: move target check to loop control statement

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Message-ID: <79037528-578c-af64-f06c-a644b7f5ba6a@linux.intel.com>
Date:   Fri, 17 Jul 2020 10:02:42 +0300
From:   Alexey Budankov <alexey.budankov@...ux.intel.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH v12 07/15] perf stat: move target check to loop control
 statement


Check for target existence in loop control statement jointly external
asynchronous 'done' signal.

Signed-off-by: Alexey Budankov <alexey.budankov@...ux.intel.com>
Acked-by: Jiri Olsa <jolsa@...hat.com>
Acked-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/builtin-stat.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 80aea49e4dac..87eebf3f55ae 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -815,10 +815,8 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
 			psignal(WTERMSIG(status), argv[0]);
 	} else {
 		enable_counters();
-		while (!done) {
+		while (!done && is_target_alive(&target, evsel_list->core.threads)) {
 			nanosleep(&ts, NULL);
-			if (!is_target_alive(&target, evsel_list->core.threads))
-				break;
 			if (timeout || handle_interval(interval, &times))
 				break;
 		}
-- 
2.24.1