From: Jakub Kicinski <jakub.kicinski@netronome.com>
To: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Cc: netdev@vger.kernel.org, davem@davemloft.net,
Willem de Bruijn <willemb@google.com>,
Naresh Kamboju <naresh.kamboju@linaro.org>
Subject: Re: [PATCH net-next] selftests/net: make so_txtime more robust to timer variance
Date: Sat, 14 Dec 2019 18:05:09 -0800 [thread overview]
Message-ID: <20191214180509.2dfd117d@cakuba.netronome.com> (raw)
In-Reply-To: <20191212163646.190982-1-willemdebruijn.kernel@gmail.com>
On Thu, 12 Dec 2019 11:36:46 -0500, Willem de Bruijn wrote:
> From: Willem de Bruijn <willemb@google.com>
>
> The SO_TXTIME test depends on accurate timers. In some virtualized
> environments the test has been reported to be flaky. This is easily
> reproduced by disabling kvm acceleration in Qemu.
>
> Allow greater variance in a run and retry to further reduce flakiness.
>
> Observed errors are one of two kinds: either the packet arrives too
> early or late at recv(), or it was dropped in the qdisc itself and the
> recv() call times out.
>
> In the latter case, the qdisc queues a notification to the error
> queue of the send socket. Also explicitly report this cause.
>
> Link: https://lore.kernel.org/netdev/CA+FuTSdYOnJCsGuj43xwV1jxvYsaoa_LzHQF9qMyhrkLrivxKw@mail.gmail.com
> Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
> Signed-off-by: Willem de Bruijn <willemb@google.com>
Applied, thank you!
prev parent reply other threads:[~2019-12-15 2:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-12 16:36 [PATCH net-next] selftests/net: make so_txtime more robust to timer variance Willem de Bruijn
2019-12-15 2:05 ` Jakub Kicinski [this message]
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