Messages in this thread | | | Subject | Re: bdflush/rpciod high CPU utilization, profile does not make sense | From | Greg Banks <> | Date | Tue, 12 Apr 2005 11:03:29 +1000 |
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On Tue, 2005-04-12 at 01:42, Jakob Oestergaard wrote: > Yes, as far as I know - the Broadcom Tigeon3 driver does not have the > option of enabling/disabling RX polling (if we agree that is what we're > talking about), but looking in tg3.c it seems that it *always* > unconditionally uses NAPI...
I've whined and moaned about this in the past, but for all its faults NAPI on tg3 doesn't lose packets. It does cause a huge increase in irq cpu time on multiple fast CPUs. What irq rate are you seeing?
I did once post a patch to make NAPI for tg3 selectable at configure time. http://marc.theaimsgroup.com/?l=linux-netdev&m=107183822710263&w=2
> No dropped packets... I wonder if the tg3 driver is being completely > honest about this...
At one point it wasn't, since this patch it is: http://marc.theaimsgroup.com/?l=linux-netdev&m=108433829603319&w=2
Greg. -- Greg Banks, R&D Software Engineer, SGI Australian Software Group. I don't speak for SGI.
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