From: Kerin Millar <kerframil@gmail.com>
To: netfilter@vger.kernel.org
Subject: Re: High ksoftirqd CPU load, high latency
Date: Fri, 02 Mar 2012 11:52:16 +0000 [thread overview]
Message-ID: <jiqc9s$245$1@dough.gmane.org> (raw)
In-Reply-To: <4F50981E.8020107@allenta.com>
Hello,
On 02/03/2012 09:51, Roberto Suarez Soto wrote:
> we've got a load problem in a firewall we administer, and we
> believe it could be related to iptables. But we don't know for sure, and
> don't know either how to confirm or deny it. I'm quite at a loss, and
> would like to get the list's opinion/ideas/voodoo magic/hints on the
> issue. Thanks in advance!
>
> The symptoms are:
>
> - High ksoftirqd load in one CPU (the one assigned to the LAN
> ethernet's IRQ)
For this issue, I've found that irqbalance works wonders. I recommend
using version 1.0 or greater and running it as a daemon. To get the best
out of it, I'd also recommend building a kernel with the following patch.
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=da8d1c8
The patch should apply cleanly to the 2.6.32 series. Here's an
explanation as to why the patch is useful:-
https://code.google.com/p/irqbalance/source/detail?r=32a7757a0314
You can look at /proc/interrupts to determine whether your card supports
multiqueue and is exposing distinct interrupts per tx/rx queue.
Cheers,
--Kerin
next prev parent reply other threads:[~2012-03-02 11:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-02 9:51 High ksoftirqd CPU load, high latency Roberto Suarez Soto
2012-03-02 11:52 ` Kerin Millar [this message]
2012-03-02 12:03 ` Jan Engelhardt
2012-03-02 12:20 ` Roberto Suarez Soto
2012-03-12 9:30 ` High ksoftirqd CPU load, high latency [somewhat SOLVED] Roberto Suarez Soto
2012-05-18 14:51 ` Vairavan
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