linux-kernel - Re: [PATCH 0/4] perf bench messaging: Kill child processes when exit abnormally in process mode

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Date:   Wed, 27 Sep 2023 20:55:28 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Yang Jihong <yangjihong1@...wei.com>
Cc:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        jolsa@...nel.org, irogers@...gle.com, adrian.hunter@...el.com,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] perf bench messaging: Kill child processes when exit
 abnormally in process mode

On Sat, Sep 23, 2023 at 2:32 AM Yang Jihong <yangjihong1@...wei.com> wrote:
>
> If perf bench messaging in process mode exits abnormally, the forked child
> processes does not exit.
>
> The test result is as follows:
>
>   # perf bench sched messaging -l 1000000 -g 1 &
>   [4] 553
>   # Running 'sched/messaging' benchmark:
>   # kill -15 533
>   # ps -ef | grep perf
>   root         425     371  0 09:11 pts/0    00:00:00 perf bench sched messaging -l 1000000 -g 1
>   root         426     425 17 09:11 pts/0    00:01:56 perf bench sched messaging -l 1000000 -g 1
>   root         427     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         428     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         429     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         430     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         431     425 17 09:11 pts/0    00:01:56 perf bench sched messaging -l 1000000 -g 1
>   root         432     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         433     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         434     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         435     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         436     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         437     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         438     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         439     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         440     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         441     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         442     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         443     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         444     425 17 09:11 pts/0    00:01:54 perf bench sched messaging -l 1000000 -g 1
>   root         445     425 17 09:11 pts/0    00:01:55 perf bench sched messaging -l 1000000 -g 1
>   root         446     425 16 09:11 pts/0    00:01:50 perf bench sched messaging -l 1000000 -g 1
>   root         447     425 16 09:11 pts/0    00:01:49 perf bench sched messaging -l 1000000 -g 1
>   root         448     425 16 09:11 pts/0    00:01:50 perf bench sched messaging -l 1000000 -g 1
>   root         449     425 16 09:11 pts/0    00:01:49 perf bench sched messaging -l 1000000 -g 1
>   root         450     425 16 09:11 pts/0    00:01:50 perf bench sched messaging -l 1000000 -g 1
>   root         451     425 16 09:11 pts/0    00:01:50 perf bench sched messaging -l 1000000 -g 1
>   root         452     425 16 09:11 pts/0    00:01:50 perf bench sched messaging -l 1000000 -g 1
>   root         453     425 16 09:11 pts/0    00:01:49 perf bench sched messaging -l 1000000 -g 1
>   root         454     425 16 09:11 pts/0    00:01:49 perf bench sched messaging -l 1000000 -g 1
> <SNIP>
>
> Capture signals SIGINT and SIGTERM to kill child processes in signal handler
>
> Yang Jihong (4):
>   perf bench messaging: Fix coding style issues for sched-messaging
>   perf bench messaging: Factor out create_worker()
>   perf bench messaging: Store chlid process pid when creating worker for
>     process mode
>   perf bench messaging: Kill child processes when exit abnormally in
>     process mode

Applied to perf-tools-next, thanks!