From: Jakub Kicinski <kuba@kernel.org>
To: Felix Fietkau <nbd@nbd.name>
Cc: netdev@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next v2] net/core: add optional threading for backlog processing
Date: Tue, 28 Mar 2023 16:16:42 -0700 [thread overview]
Message-ID: <20230328161642.3d2f101c@kernel.org> (raw)
In-Reply-To: <20230328195925.94495-1-nbd@nbd.name>
On Tue, 28 Mar 2023 21:59:25 +0200 Felix Fietkau wrote:
> When dealing with few flows or an imbalance on CPU utilization, static RPS
> CPU assignment can be too inflexible. Add support for enabling threaded NAPI
> for backlog processing in order to allow the scheduler to better balance
> processing. This helps better spread the load across idle CPUs.
Can you share some numbers vs a system where RPS only spreads to
the cores which are not running NAPI?
IMHO you're putting a lot of faith in the scheduler and you need
to show that it actually does what you say it will do.
next prev parent reply other threads:[~2023-03-28 23:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-28 19:59 [PATCH net-next v2] net/core: add optional threading for backlog processing Felix Fietkau
2023-03-28 22:30 ` Eric Dumazet
2023-03-28 23:16 ` Jakub Kicinski [this message]
2023-03-30 11:01 ` Paolo Abeni
2023-03-30 11:11 ` Felix Fietkau
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