linux-kernel - Re: [PATCH net 1/3] selftests: tc: set timeout to 15 minutes

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Message-ID: <bf7f8867-6b14-dd53-a6e4-2addee4a5ad8@huawei.com>
Date:   Fri, 14 Jul 2023 10:25:23 +0800
From:   shaozhengchao <shaozhengchao@...wei.com>
To:     Matthieu Baerts <matthieu.baerts@...sares.net>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>, Shuah Khan <shuah@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        "David S. Miller" <davem@...emloft.net>,
        Paul Blakey <paulb@...lanox.com>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        <mptcp@...ts.linux.dev>
CC:     Pedro Tammela <pctammela@...atatu.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-kselftest@...r.kernel.org>, <stable@...r.kernel.org>
Subject: Re: [PATCH net 1/3] selftests: tc: set timeout to 15 minutes



On 2023/7/14 5:16, Matthieu Baerts wrote:
> When looking for something else in LKFT reports [1], I noticed that the
> TC selftest ended with a timeout error:
> 
>    not ok 1 selftests: tc-testing: tdc.sh # TIMEOUT 45 seconds
> 
> The timeout had been introduced 3 years ago, see the Fixes commit below.
> 
> This timeout is only in place when executing the selftests via the
> kselftests runner scripts. I guess this is not what most TC devs are
> using and nobody noticed the issue before.
> 
> The new timeout is set to 15 minutes as suggested by Pedro [2]. It looks
> like it is plenty more time than what it takes in "normal" conditions.
> 
> Fixes: 852c8cbf34d3 ("selftests/kselftest/runner.sh: Add 45 second timeout per test")
> Cc: stable@...r.kernel.org
> Link: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230711/testrun/18267241/suite/kselftest-tc-testing/test/tc-testing_tdc_sh/log [1]
> Link: https://lore.kernel.org/netdev/0e061d4a-9a23-9f58-3b35-d8919de332d7@tessares.net/T/ [2]
> Suggested-by: Pedro Tammela <pctammela@...atatu.com>
> Signed-off-by: Matthieu Baerts <matthieu.baerts@...sares.net>
> ---
>   tools/testing/selftests/tc-testing/settings | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/tools/testing/selftests/tc-testing/settings b/tools/testing/selftests/tc-testing/settings
> new file mode 100644
> index 000000000000..e2206265f67c
> --- /dev/null
> +++ b/tools/testing/selftests/tc-testing/settings
> @@ -0,0 +1 @@
> +timeout=900
> 
I remember last year when I tested all the tdc cases（qdisc + filter +
action + infra） in my vm machine, it took me nearly 20 minutes.
So I think it should be more than 1200 seconds if all cases need to be
tested.

Maybe we should really optimize the parallel execution process of tdc.

Zhengchao Shao