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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=47868E28.1070600@nortel.com \
--to=cfriesen@nortel.com \
--cc=jchapman@katalix.com \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.