netdev - Re: [PATCH net] selftests/net: relax cpu affinity requirement in msg

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Message-Id: <20200805.122607.752014846797470762.davem@davemloft.net>
Date:   Wed, 05 Aug 2020 12:26:07 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     willemdebruijn.kernel@...il.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com, willemb@...gle.com,
        colin.king@...onical.com
Subject: Re: [PATCH net] selftests/net: relax cpu affinity requirement in
 msg_zerocopy test

From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
Date: Wed,  5 Aug 2020 04:40:45 -0400

> From: Willem de Bruijn <willemb@...gle.com>
> 
> The msg_zerocopy test pins the sender and receiver threads to separate
> cores to reduce variance between runs.
> 
> But it hardcodes the cores and skips core 0, so it fails on machines
> with the selected cores offline, or simply fewer cores.
> 
> The test mainly gives code coverage in automated runs. The throughput
> of zerocopy ('-z') and non-zerocopy runs is logged for manual
> inspection.
> 
> Continue even when sched_setaffinity fails. Just log to warn anyone
> interpreting the data.
> 
> Fixes: 07b65c5b31ce ("test: add msg_zerocopy test")
> Reported-by: Colin Ian King <colin.king@...onical.com>
> Signed-off-by: Willem de Bruijn <willemb@...gle.com>

Applied and queued up for -stable, thanks.