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From: Eric Dumazet <eric.dumazet@gmail.com>
To: Paolo Abeni <pabeni@redhat.com>,
	Eric Dumazet <eric.dumazet@gmail.com>,
	netdev@vger.kernel.org
Cc: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Subject: Re: unexpected GRO/veth behavior
Date: Mon, 10 Sep 2018 10:06:19 -0700	[thread overview]
Message-ID: <a702676d-b87c-66fd-2477-6c5537179885@gmail.com> (raw)
In-Reply-To: <c5be74086876ce96353cb79e6486df321d58d48d.camel@redhat.com>



On 09/10/2018 08:22 AM, Paolo Abeni wrote:
 in this already heavy cost engine.
> 
> Yup, even if I do not see any measurable cost added by the posted code.

Sure, micro bench marks wont show anything.

Now, if GRO receives one packet every 100 usec, as many hosts in the wild do,
there is an additional cost because of icache being wasted.

  reply	other threads:[~2018-09-10 22:01 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-10 14:44 unexpected GRO/veth behavior Paolo Abeni
2018-09-10 14:56 ` Eric Dumazet
2018-09-10 15:22   ` Paolo Abeni
2018-09-10 17:06     ` Eric Dumazet [this message]
2018-09-11  0:33   ` Toshiaki Makita
2018-09-11  6:54 ` Paolo Abeni
2018-09-11 10:27   ` Eric Dumazet
2018-09-11 11:07     ` Toshiaki Makita
2018-09-14  2:51       ` Toshiaki Makita
2018-09-11 11:44     ` Paolo Abeni
2018-09-11 15:42       ` Eric Dumazet

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