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Re: Info: NAPI performance at "low" loads

To: "David S. Miller" <davem@xxxxxxxxxx>
Subject: Re: Info: NAPI performance at "low" loads
From: Jeff Garzik <jgarzik@xxxxxxxxxxxxxxxx>
Date: Tue, 17 Sep 2002 17:54:42 -0400
Cc: akpm@xxxxxxxxx, manfred@xxxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
Organization: MandrakeSoft
References: <3D879F59.6BDF9443@xxxxxxxxx> <20020917.142635.114214508.davem@xxxxxxxxxx> <3D87A264.8D5F3AD2@xxxxxxxxx> <20020917.143947.07361352.davem@xxxxxxxxxx>
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David S. Miller wrote:
Any driver should be able to get the NAPI overhead to max out at
2 PIOs per packet.


Just to pick nits... my example went from 2 or 3 IOs [depending on the presence/absence of a work loop] to 6 IOs.

Feel free to re-read my message and point out where an IO can be eliminated...

        Jeff




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