linux-kernel - Re: [ovs-dev] [PATCH net-next v2] selftests: openvswitch: retry instead of sleep

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Message-ID: <41bfecdd-b301-4129-bebe-ee8211a2e1d4@ovn.org>
Date: Thu, 11 Jul 2024 13:28:56 +0200
From: Ilya Maximets <i.maximets@....org>
To: Adrian Moreno <amorenoz@...hat.com>, netdev@...r.kernel.org
Cc: dev@...nvswitch.org, linux-kernel@...r.kernel.org,
 Eric Dumazet <edumazet@...gle.com>, linux-kselftest@...r.kernel.org,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Shuah Khan <shuah@...nel.org>, "David S. Miller" <davem@...emloft.net>,
 i.maximets@....org
Subject: Re: [ovs-dev] [PATCH net-next v2] selftests: openvswitch: retry
 instead of sleep

On 7/10/24 11:04, Adrian Moreno wrote:
> There are a couple of places where the test script "sleep"s to wait for
> some external condition to be met.
> 
> This is error prone, specially in slow systems (identified in CI by
> "KSFT_MACHINE_SLOW=yes").
> 
> To fix this, add a "ovs_wait" function that tries to execute a command
> a few times until it succeeds. The timeout used is set to 5s for
> "normal" systems and doubled if a slow CI machine is detected.
> 
> This should make the following work:
> 
> $ vng --build  \
>     --config tools/testing/selftests/net/config \
>     --config kernel/configs/debug.config
> 
> $ vng --run . --user root -- "make -C tools/testing/selftests/ \
>     KSFT_MACHINE_SLOW=yes TARGETS=net/openvswitch run_tests"
> 
> Signed-off-by: Adrian Moreno <amorenoz@...hat.com>
> ---
>  .../selftests/net/openvswitch/openvswitch.sh  | 45 +++++++++++++++----
>  .../selftests/net/openvswitch/ovs-dpctl.py    |  1 +
>  2 files changed, 38 insertions(+), 8 deletions(-)

Seem like we don't have a signal from CI for some reason yet,
but I tested this locally and it seem to work fine.  Either
way it's a better way of doing things than sleep'n'hope.

Reviewed-by: Ilya Maximets <i.maximets@....org>