From: Junio C Hamano <gitster@pobox.com>
To: Max Kirillov <max@max630.net>
Cc: "SZEDER Gábor" <szeder.dev@gmail.com>,
git@vger.kernel.org,
"Johannes Schindelin" <Johannes.Schindelin@gmx.de>,
"Randall S. Becker" <rsbecker@nexbridge.com>
Subject: Re: [PATCH] t5562: chunked sleep to avoid lost SIGCHILD
Date: Tue, 19 Feb 2019 10:38:39 -0800 [thread overview]
Message-ID: <xmqq1s4339ow.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <20190218205028.32486-1-max@max630.net> (Max Kirillov's message of "Mon, 18 Feb 2019 22:50:28 +0200")
Max Kirillov <max@max630.net> writes:
> If was found during stress-test run that a test may hang by 60 seconds.
> It supposedly happens because SIGCHILD was received before sleep has
> started.
>
> Fix by looping by smaller chunks, checking $exited after each of them.
> Then lost SIGCHILD would not cause longer delay than 1 second.
>
> Reported-by: SZEDER Gábor <szeder.dev@gmail.com>
> Signed-off-by: Max Kirillov <max@max630.net>
> ---
> Submitting as proper patch. Note: I believe it does not relate to other issues
> discussed in this thread.
> t/t5562/invoke-with-content-length.pl | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/t/t5562/invoke-with-content-length.pl b/t/t5562/invoke-with-content-length.pl
> index 0943474af2..257e280e3b 100644
> --- a/t/t5562/invoke-with-content-length.pl
> +++ b/t/t5562/invoke-with-content-length.pl
> @@ -29,7 +29,12 @@
> }
> print $out $body_data or die "Cannot write data: $!";
>
> -sleep 60; # is interrupted by SIGCHLD
Ah, of course. If SIGCHLD interrupts, sets $existed in the handler,
then we won't go back to sleep. But if the signal came before the
sleep starts, we spend full 60 seconds here before we check $exited.
Makes sense.
> +my $counter = 0;
> +while (not $exited and $counter < 60) {
> + sleep 1;
> + $counter = $counter + 1;
> +}
> +
> if (!$exited) {
> close($out);
> die "Command did not exit after reading whole body";
prev parent reply other threads:[~2019-02-19 18:38 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-14 15:04 [ANNOUNCE] Git v2.21.0-rc1 (NonStop Results) Randall S. Becker
2019-02-14 19:56 ` Junio C Hamano
2019-02-14 21:36 ` Johannes Schindelin
2019-02-14 22:25 ` Randall S. Becker
2019-02-15 13:02 ` SZEDER Gábor
2019-02-15 13:49 ` Randall S. Becker
2019-02-15 20:37 ` Max Kirillov
2019-02-15 21:13 ` Randall S. Becker
2019-02-16 8:26 ` Max Kirillov
2019-02-18 20:50 ` [PATCH] t5562: chunked sleep to avoid lost SIGCHILD Max Kirillov
2019-02-18 20:54 ` Randall S. Becker
2019-02-18 20:59 ` Max Kirillov
2019-02-19 18:38 ` Junio C Hamano [this message]
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