Re: Early SPECWeb99 results on 2.5.33 with TSO on e1000

David S. Miller
2002-09-06T18:41:20Z

From: Manfred Spraul <manfred@colorfullife.com>
Date: Fri, 06 Sep 2002 20:35:08 +0200

The second point was that interrupt mitigation must remain enabled, even
with NAPI: the automatic mitigation doesn't work with process space
limited loads (e.g. TCP: backlog queue is drained quickly, but the
system is busy processing the prequeue or receive queue)

Not true. NAPI is in fact a %100 replacement for hw interrupt
mitigation strategies. The cpu usage elimination afforded by
hw interrupt mitigation is also afforded by NAPI and even more
so by NAPI.

See Jamal's paper.

Franks a lot,
David S. Miller
davem@redhat.com