linux-kernel - Re: [PATCH v2] selftests: rtc: Increase test timeout so that all tests run

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Date:   Wed, 12 Jan 2022 21:22:08 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>
Cc:     Shuah Khan <shuah@...nel.org>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        linux-rtc@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com
Subject: Re: [PATCH v2] selftests: rtc: Increase test timeout so that all
 tests run

On 12/01/2022 14:41:42-0500, Nícolas F. R. A. Prado wrote:
> The timeout setting for the rtc kselftest is currently 90 seconds. This
> setting is used by the kselftest runner to stop running a test if it
> takes longer than the assigned value.
> 
> However, two of the test cases inside rtc set alarms. These alarms are
> set to the next beginning of the minute, so each of these test cases may
> take up to, in the worst case, 60 seconds.
> 
> In order to allow for all test cases in rtc to run, even in the worst
> case, when using the kselftest runner, the timeout value should be
> increased to at least 120. Set it to 180, so there's some additional
> slack.
> 
> Correct operation can be tested by running the following command right
> after the start of a minute (low second count), and checking that all
> test cases run:
> 
> 	./run_kselftest.sh -c rtc
> 
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Acked-by: Alexandre Belloni <alexandre.belloni@...tlin.com>

> ---
> 
> Changes in v2:
> - Expanded commit message to make the issue, and how to test the fix, clearer
> 
> v1: https://lore.kernel.org/all/20220112165359.3206047-1-nfraprado@collabora.com/
> 
>  tools/testing/selftests/rtc/settings | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/rtc/settings b/tools/testing/selftests/rtc/settings
> index ba4d85f74cd6..a953c96aa16e 100644
> --- a/tools/testing/selftests/rtc/settings
> +++ b/tools/testing/selftests/rtc/settings
> @@ -1 +1 @@
> -timeout=90
> +timeout=180
> -- 
> 2.34.1
> 

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com