On Mon, Jul 18, 2011 at 08:54:15AM +0100, John Helliwell wrote:
> Are you running irqbalance? It may help distribute network interface 
> interrupts

It's often worse for low-latency processing such as haproxy. irqbalance is
nice when each interrupt induces very long CPU processing, but here we have
almost a 1-to-1 affinity between packets and processed requests (especially
in keep-alive mode), and hard-fixing interrupts and CPU affinity always yields
to best results, and by far.


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