Re: Info: NAPI performance at "low" loads

From: Andrew Morton (
Date: Tue Sep 17 2002 - 21:16:25 EST

"David S. Miller" wrote:
> From: jamal <>
> Date: Tue, 17 Sep 2002 20:57:58 -0400 (EDT)
> I am not so sure with that 6% difference there is no other bug lurking
> there; 6% seems too large for an extra two PCI transactions per packet.
> {in,out}{b,w,l}() operations have a fixed timing, therefore his
> results doesn't sound that far off.
> It is also one of the reasons I suspect Andrew saw such bad results
> with 3c59x, but probably that is not the only reason.

They weren't "very bad", iirc. Maybe a 5% increase in CPU load.

It was all a long time ago. Will retest if someone sends URLs.
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