From: "Chris Friesen" <cfriesen@nortel.com>
To: Ben Greear <greearb@candelatech.com>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: questions on NAPI processing latency and dropped network packets
Date: Mon, 21 Jan 2008 17:15:15 -0600 [thread overview]
Message-ID: <47952783.8080505@nortel.com> (raw)
In-Reply-To: <47950A71.5010304@candelatech.com>
Ben Greear wrote:
> Chris Friesen wrote:
>
>> Is there anything else we can do to minimize the latency of network
>> packet processing and avoid having to crank the rx ring size up so high?
>
>
> Why is it such a big deal to crank up the rx queue length? Seems like
> a perfectly normal way to handle bursts like this...
It means that the latency for handling those packets is higher than it
could be. Draining 4096 packets from the queue will take a while.
Ideally we'd like to bring the latency down as much as possible, and
then bump up the rx queue length to handle the rest.
Chris
next prev parent reply other threads:[~2008-01-21 23:15 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-10 17:24 questions on NAPI processing latency and dropped network packets Chris Friesen
2008-01-10 17:37 ` Kok, Auke
2008-01-10 18:12 ` Chris Friesen
2008-01-10 18:26 ` Kok, Auke
2008-01-10 18:25 ` James Chapman
2008-01-10 21:29 ` Chris Friesen
2008-01-10 18:41 ` Rick Jones
2008-01-10 19:01 ` Kok, Auke
2008-01-11 1:20 ` David Miller
2008-01-11 14:59 ` Chris Friesen
2008-01-11 22:29 ` Herbert Xu
2008-01-12 1:53 ` David Miller
2008-01-14 15:58 ` Chris Friesen
2008-01-15 7:19 ` Jarek Poplawski
2008-01-15 14:47 ` Chris Friesen
2008-01-15 15:17 ` Radoslaw Szkodzinski
2008-01-15 17:14 ` Chris Friesen
2008-01-15 17:23 ` Eric Dumazet
2008-01-15 20:29 ` Jarek Poplawski
2008-01-16 0:17 ` Herbert Xu
2008-01-16 6:58 ` Jarek Poplawski
2008-01-16 20:04 ` Willy Tarreau
2008-01-16 22:42 ` Jarek Poplawski
2008-01-12 5:37 ` Ray Lee
2008-01-14 15:49 ` Chris Friesen
2008-01-14 16:56 ` Eric Dumazet
2008-01-14 19:25 ` Chris Friesen
2008-01-14 19:33 ` Eric Dumazet
2008-01-14 20:02 ` Chris Friesen
2008-01-15 15:09 ` Vlad Yasevich
2008-01-21 19:53 ` Chris Friesen
2008-01-21 21:11 ` Ben Greear
2008-01-21 23:15 ` Chris Friesen [this message]
2008-01-21 23:32 ` Ben Greear
2008-01-21 21:31 ` Eric Dumazet
2008-01-21 23:25 ` Chris Friesen
2008-01-22 5:46 ` Eric Dumazet
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