Messages in this thread | | | Date | Wed, 14 Aug 2002 01:30:07 +0200 | From | Andrea Arcangeli <> | Subject | Re: [PATCH] NUMA-Q disable irqbalance |
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On Tue, Aug 13, 2002 at 05:29:50PM -0500, Andrew Theurer wrote: > > 2.4.19-rc3aa3: > > > > No Balance Ingo IRQ Balance Andrea IRQ Balance > > 794 Mbps 787 Mbps 792 Mbps > > > > With hyperthreading: > > > > No Balance Ingo IRQ Balance Andrea IRQ Balance > > 773 Mbps 798 Mbps 809 Mbps
thanks again for running the above benchmarks.
> version is a little less aggressive and has less overhead, something I'd > prefer in 2.5.
Second that of course, btw, the detailed explanataion of the changes I did while merging it can be found on lse-tech.
it is also possible HZ/50 is too high frequency still, I didn't run any extensive test on the reprogramming frequency. I would suggest to try with HZ/10 too (so every 100msec instead of every 20msec).
BTW, the very same algorithm should also be shared by alpha, alpha never had hardware irq balancing support, it's like a p4, and we do static routing distribution choosed by the kernel at boot which is been pretty good so far (better than mainline 2.4 on a p4 smp) but the irqblanace algorithm should be better there too.
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