netdev - Re: [PATCH net] selftests: drv-net: rss_ctx: Add short delay between per-context traffic checks

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Message-ID: <20250701172352.5dd42418@kernel.org>
Date: Tue, 1 Jul 2025 17:23:52 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Nimrod Oren <noren@...dia.com>
Cc: Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>, Willem de Bruijn
 <willemb@...gle.com>, <netdev@...r.kernel.org>,
 <linux-kselftest@...r.kernel.org>, Gal Pressman <gal@...dia.com>, "Carolina
 Jubran" <cjubran@...dia.com>
Subject: Re: [PATCH net] selftests: drv-net: rss_ctx: Add short delay
 between per-context traffic checks

On Sun, 29 Jun 2025 14:18:12 +0300 Nimrod Oren wrote:
> A few packets may still be sent and received during the termination of
> the iperf processes. These late packets cause failures when they arrive
> on queues expected to be empty.
> 
> Add a one second delay between repeated _send_traffic_check() calls in
> rss_ctx tests to ensure such packets are processed before the next
> traffic checks are performed.

Sprinklings sleeps should be last resort. Is there a way to wait for
iperf to shut down cleanly, or wait for the socket to be closed fully?
Like wait_port_listen() ?