From: "Chris Friesen" <cfriesen@nortel.com>
To: James Chapman <jchapman@katalix.com>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: questions on NAPI processing latency and dropped network packets
Date: Thu, 10 Jan 2008 15:29:12 -0600 [thread overview]
Message-ID: <47868E28.1070600@nortel.com> (raw)
In-Reply-To: <47866327.8090905@katalix.com>
James Chapman wrote:
> What's changed in your application? Any real-time threads in there?
>
>>From the top output below, looks like SigtranServices is consuming all
> your CPU...
There are two cpus, and SigtranServices is multithreaded with many
threads. Most of these threads are affined to cpu0, a couple to cpu1.
None of the threads are realtime.
Top is showing 37% idle on cpu0, and 6% idle on cpu1, so not all the cpu
is being consumed. However, I'm wondering if we're hitting bursty bits
and we're just running out of time.
I'm going to try a system with MAX_SOFTIRQ_RESTART bumped up a bit, and
also enable profiling.
Chris
next prev parent reply other threads:[~2008-01-10 21:30 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 [this message]
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
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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