Messages in this thread | | | Subject | Re: 2.6.19-rc1: Volanomark slowdown | From | Tim Chen <> | Date | Wed, 08 Nov 2006 14:07:32 -0800 |
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On Wed, 2006-11-08 at 23:10 +0100, Olaf Kirch wrote:
> > In fixing performance issues, the most obvious explanation isn't always > the right one. It's quite possible you're right, sure. > > What I'm saying though is that it doesn't rhyme with what I've seen of > Volanomark - we ran 2.6.16 on a 4p Intel box for instance and it didn't > come close to saturating a Gigabit pipe before it maxed out on CPU load. >
I am running Volanomark in a loopback mode on a 2P woodcrest box (4 cores). So the configuration is a bit different.
In my testing, the CPU utilization is at 100%. So increase in ACKs will cost CPU to devote more time to process those ACKs and reduce throughput.
> > You could count the number of outbound packets dropped on the server. >
As I'm running in loopback mode, there are no dropped packets.
Thanks.
Tim
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