IRQ31 and IRQ32 on HPDL585 running FreeBSD 7.0 are consuming
HIGH CPU usage
Won De Erick
won.derick at yahoo.com
Fri Nov 14 05:14:14 PST 2008
> From: Ivan Voras <ivoras at freebsd.org>
> To: freebsd-hardware at freebsd..org
> Cc: freebsd-net at freebsd.org
> Sent: Friday, November 14, 2008 8:55:13 PM
> Subject: Re: IRQ31 and IRQ32 on HPDL585 running FreeBSD 7.0 are consuming HIGH CPU usage
> Won De Erick wrote:
> > 17002 1634 25720672 16423 0 1143508 0 0
> > 16943 1643 25629892 16642 0 1160858 0 0
> > 16995 1644 25708823 16539 0 1153782 0 0
> > 17026 1643 25758462 16606 0 1153342 0 0
> What do you use for generating the traffic?
I used w-get in bombarding tcp traffic w/ thousand of sessions.
> > However, network throughput didn't change in the two scenarios above.
> > Is there anything that I can test to improve my network throughput.
> I'm not sure but you could maybe try disabling all but one of your CPUs
> and see if anything changes. It looks like you have at least 16 CPUs. On
> my machine, with 8 CPUs (2xquad core) I get roughly 150,000 PPS before I
> hit a similar single-CPU-bound network processing bottleneck (also with
> Intel® PRO/1000 PT/Server) - which is too low for my needs so I'm
> searching for a solution. In my case I don't see transmission errors.
will try this.
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