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Re: [E1000-devel] Transmission limit

To: sfeldma@xxxxxxxxx
Subject: Re: [E1000-devel] Transmission limit
From: jamal <hadi@xxxxxxxxxx>
Date: 03 Dec 2004 08:24:49 -0500
Cc: Lennert Buytenhek <buytenh@xxxxxxxxxxxxxx>, Robert Olsson <Robert.Olsson@xxxxxxxxxxx>, P@xxxxxxxxxxxxxx, mellia@xxxxxxxxxxxxxxxxxxxx, e1000-devel@xxxxxxxxxxxxxxxxxxxxx, Jorge Manuel Finochietto <jorge.finochietto@xxxxxxxxx>, Giulio Galante <galante@xxxxxxxxx>, netdev@xxxxxxxxxxx
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On Thu, 2004-12-02 at 01:13, Scott Feldman wrote:
> On Wed, 2004-12-01 at 13:35, Lennert Buytenhek wrote: 
> > Pretty graph attached.  From ~220B packets or so it does wire speed, but
> > there's still an odd drop in performance around 256B packets (which is
> > also there without your patch.)  From 350B packets or so, performance is
> > identical with or without your patch (wire speed.)
> Seems this is helping PCI nics but not PCI-X.  I was using PCI 32/33. 
> Can't explain the dip around 256B.

Interesting thought. I also saw improvements with my batching patch for
PCI 32/32 but nothing noticeable in PCI-X 64/66.


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