| To: | hadi@xxxxxxxxxx |
|---|---|
| Subject: | Re: Info: NAPI performance at "low" loads |
| From: | "David S. Miller" <davem@xxxxxxxxxx> |
| Date: | Tue, 17 Sep 2002 18:00:14 -0700 (PDT) |
| Cc: | akpm@xxxxxxxxx, manfred@xxxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx |
| In-reply-to: | <Pine.GSO.4.30.0209172053360.3686-100000@shell.cyberus.ca> |
| References: | <3D87A59C.410FFE3E@digeo.com> <Pine.GSO.4.30.0209172053360.3686-100000@shell.cyberus.ca> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
From: jamal <hadi@xxxxxxxxxx>
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.
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