----- On Apr 1, 2021, at 12:19 PM, lttng-dev lttng-dev@lists.lttng.org wrote:
> ----- On Mar 31, 2021, at 2:56 PM, lttng-dev lttng-dev@lists.lttng.org wrote:
>
>> the following tests fails on arm64
>> - test_event_vpid_tracker ust 0 "${EVENT_NAME}"
>> - test_event_vpid_track_untrack ust 0 "${EVENT_NAME}"
>> - test_event_pid_tracker ust 0 "${EVENT_NAME}"
>> - test_event_pid_track_untrack ust 0 "${EVENT_NAME}"
>>
>> Signed-off-by: Anders Wallin <walli...@gmail.com>
>> ---
>> tests/regression/tools/tracker/test_event_tracker | 4 +++-
>> 1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/tests/regression/tools/tracker/test_event_tracker
>> b/tests/regression/tools/tracker/test_event_tracker
>> index 711690af..649c7e61 100755
>> --- a/tests/regression/tools/tracker/test_event_tracker
>> +++ b/tests/regression/tools/tracker/test_event_tracker
>> @@ -5,7 +5,7 @@
>> #
>> # SPDX-License-Identifier: GPL-2.0-only
>>
>> -TEST_DESC="LTTng - Event traker test"
>> +TEST_DESC="LTTng - Event tracker test"
>>
>> CURDIR=$(dirname "$0")/
>> TESTDIR="$CURDIR/../../.."
>> @@ -42,6 +42,8 @@ function prepare_ust_app
>>
>> $TESTAPP_BIN -i $NR_ITER -w $NR_USEC_WAIT -a "$AFTER_FIRST_PATH" -b
>> "$BEFORE_LAST_PATH" &
>> CHILD_PID=$!
>> + # voluntary context switch to start $TESTAPP_BIN
>> + sleep 0.1
>
> No, we have been bitten again and again by test issues hidden by sleeps in the
> test code. Using sleeps for synchronization is flaky.
>
> I don't know if we documented it, but we as maintainers are strongly against
> anything that looks like a delay-based approach to fixing a race in the tests.
> This typically just bury the race under the carpet and it shows up only in
> specific conditions on the CI workers.
>
> We need to add proper rendez-vous based synchronization to the test if some
> is missing.
>
> Adding Jérémie in CC.
And then I read on the rest of the email thread... so it's being taken care of,
good! :)
Thanks,
Mathieu
>
> Thanks,
>
> Mathieu
>
>
>> }
>>
>> function trace_ust_app
>> --
>> 2.31.1
>>
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>
> --
> Mathieu Desnoyers
> EfficiOS Inc.
> http://www.efficios.com
> _______________________________________________
> lttng-dev mailing list
> lttng-dev@lists.lttng.org
> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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