linux-kernel - Re: [PATCHv3] selftests/timers: Turn off timeout setting

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Date:   Mon, 10 Aug 2020 14:48:33 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     John Stultz <john.stultz@...aro.org>,
        Po-Hsu Lin <po-hsu.lin@...onical.com>
Cc:     linux-kselftest@...r.kernel.org, Shuah Khan <shuah@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>, joe.lawrence@...hat.com,
        lkml <linux-kernel@...r.kernel.org>,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCHv3] selftests/timers: Turn off timeout setting

On 8/4/20 3:38 PM, John Stultz wrote:
> On Tue, Mar 17, 2020 at 7:42 PM Po-Hsu Lin <po-hsu.lin@...onical.com> wrote:
>>
>> The following 4 tests in timers can take longer than the default 45
>> seconds that added in commit 852c8cbf34d3 ("selftests/kselftest/runner.sh:
>> Add 45 second timeout per test") to run:
>>    * nsleep-lat - 2m7.350s
>>    * set-timer-lat - 2m0.66s
>>    * inconsistency-check - 1m45.074s
>>    * raw_skew - 2m0.013s
>>
>> Thus they will be marked as failed with the current 45s setting:
>>    not ok 3 selftests: timers: nsleep-lat # TIMEOUT
>>    not ok 4 selftests: timers: set-timer-lat # TIMEOUT
>>    not ok 6 selftests: timers: inconsistency-check # TIMEOUT
>>    not ok 7 selftests: timers: raw_skew # TIMEOUT
>>
>> Disable the timeout setting for timers can make these tests finish
>> properly:
>>    ok 3 selftests: timers: nsleep-lat
>>    ok 4 selftests: timers: set-timer-lat
>>    ok 6 selftests: timers: inconsistency-check
>>    ok 7 selftests: timers: raw_skew
>>
>> https://bugs.launchpad.net/bugs/1864626
>> Fixes: 852c8cbf34d3 ("selftests/kselftest/runner.sh: Add 45 second timeout per test")
>> Signed-off-by: Po-Hsu Lin <po-hsu.lin@...onical.com>
>> ---
>>   tools/testing/selftests/timers/Makefile | 1 +
>>   tools/testing/selftests/timers/settings | 1 +
>>   2 files changed, 2 insertions(+)
>>   create mode 100644 tools/testing/selftests/timers/settings
>>
>> diff --git a/tools/testing/selftests/timers/Makefile b/tools/testing/selftests/timers/Makefile
>> index 7656c7c..0e73a16 100644
>> --- a/tools/testing/selftests/timers/Makefile
>> +++ b/tools/testing/selftests/timers/Makefile
>> @@ -13,6 +13,7 @@ DESTRUCTIVE_TESTS = alarmtimer-suspend valid-adjtimex adjtick change_skew \
>>
>>   TEST_GEN_PROGS_EXTENDED = $(DESTRUCTIVE_TESTS)
>>
>> +TEST_FILES := settings
>>
>>   include ../lib.mk
>>
>> diff --git a/tools/testing/selftests/timers/settings b/tools/testing/selftests/timers/settings
>> new file mode 100644
>> index 0000000..e7b9417
>> --- /dev/null
>> +++ b/tools/testing/selftests/timers/settings
>> @@ -0,0 +1 @@
>> +timeout=0
>> --
> 
> Apologies for missing this before.  I've not tested with this, but it
> sounds sane to me. A number of the timekeeping tests do take a while
> to run.
> 
> Acked-by: John Stultz <john.stultz@...aro.org>
> 

Thanks. I will get this in for 5.9-rc2 fixes update.

thanks,
-- Shuah