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RE: e1000 performance hack for ppc64 (Power4)

To: "Herman Dierks" <hdierks@xxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxx>
Subject: RE: e1000 performance hack for ppc64 (Power4)
From: "Feldman, Scott" <scott.feldman@xxxxxxxxx>
Date: Mon, 16 Jun 2003 11:21:16 -0700
Cc: <ltd@xxxxxxxxx>, <anton@xxxxxxxxx>, <haveblue@xxxxxxxxxx>, <dwg@xxxxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>, "Nancy J Milliner" <milliner@xxxxxxxxxx>, "Ricardo C Gonzalez" <ricardoz@xxxxxxxxxx>, "Brian Twichell" <twichell@xxxxxxxxxx>, <netdev@xxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
Thread-index: AcMzSuDMkewgo8NbQ/eWd2USmzVnawA6Bt3g
Thread-topic: e1000 performance hack for ppc64 (Power4)
Herman wrote:
> Its only the MTU 1500 case with non-TSO that we are 
> discussing here so copying a few bytes is really not a big 
> deal as the data is already in cache from copying into 
> kernel.  If it lets the adapter run at speed, thats what 
> customers want and what we need. Granted, if the HW could 
> deal with this we would not have to, but thats not the case 
> today so I want to spend a few CPU cycles to get best 
> performance. Again, if this is not done on other platforms, I 
> don't understand why you care.

I care because adding the arch-specific hack creates a maintenance issue
for me.


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