From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lennert Buytenhek <buytenh@wantstofly.org>
Subject: Re: 1.03Mpps on e1000 (was: Re: [E1000-devel] Transmission limit)
Date: Sun, 5 Dec 2004 18:58:17 +0100
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Cc: Scott Feldman <sfeldma@pobox.com>, jamal <hadi@cyberus.ca>,
        Robert Olsson <Robert.Olsson@data.slu.se>, P@draigBrady.com,
        mellia@prezzemolo.polito.it, e1000-devel@lists.sourceforge.net,
        Jorge Manuel Finochietto <jorge.finochietto@polito.it>,
        Giulio Galante <galante@polito.it>, netdev@oss.sgi.com
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To: Martin Josefsson <gandalf@wlug.westbo.se>
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On Sun, Dec 05, 2004 at 05:48:34PM +0100, Martin Josefsson wrote:

> I tried using both ports on the 82546GB nic.
> 
>         delay        nodelay
> 1CPU    1.95 Mpps    1.76 Mpps
> 2CPU    1.60 Mpps    1.44 Mpps

I get:

	delay		nodelay
1CPU	1837356		1837330
2CPU	2035060		1947424

So in your case using 2 CPUs degrades performance, in my case it
increases it.  And TDT delaying/coalescing only improves performance
when using 2 CPUs, and even then only slightly (and only for <= 62B
packets.)


--L