"David S. Miller" wrote:

   From: jamal [off-list ref]
   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.