From mboxrd@z Thu Jan  1 00:00:00 1970
From: Robert Olsson <robert@herjulf.net>
Subject: Re: [PATCH] pktgen node allocation
Date: Mon, 22 Mar 2010 19:05:29 +0100
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Cc: Robert Olsson <robert@herjulf.net>,
	David Miller <davem@davemloft.net>, netdev@vger.kernel.org,
	olofh@kth.se
To: Eric Dumazet <eric.dumazet@gmail.com>
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Eric Dumazet writes:

 > > Result "manually" tuned. 
 > > 
 > > eth0 9617.7 M bit/s      822 k pps 
 > > eth1 9619.1 M bit/s      823 k pps 
 > > eth2 9619.1 M bit/s      823 k pps 
 > > eth3 9619.2 M bit/s      823 k pps 
 > > eth4 5995.2 M bit/s      512 k pps  <-  PCIe-x8
 > > eth5 5995.3 M bit/s      512 k pps  <-  PCIe-x8
 > > eth6 9619.2 M bit/s      823 k pps 
 > > eth7 9619.2 M bit/s      823 k pps 
 > > eth8 9619.1 M bit/s      823 k pps 
 > > eth9 9619.0 M bit/s      823 k pps 
 > > 
 > > > 90 Gbit/s

 DMA potential this box is about four 10g ports.

 > > Result "manually" mistuned by switching node 0 and 1. 
 > > 
 > > eth0 9613.6 M bit/s      822 k pps 
 > > eth1 9614.9 M bit/s      822 k pps 
 > > eth2 9615.0 M bit/s      822 k pps 
 > > eth3 9615.1 M bit/s      822 k pps 
 > > eth4 2918.5 M bit/s      249 k pps  <-  PCIe-x8
 > > eth5 2918.4 M bit/s      249 k pps  <-  PCIe-x8
 > > eth6 8597.0 M bit/s      735 k pps 
 > > eth7 8597.0 M bit/s      735 k pps 
 > > eth8 8568.3 M bit/s      733 k pps 
 > > eth9 8568.3 M bit/s      733 k pps 
 > > 
 > I wonder why eth0-eth3 results are unchanged after a node flip.

 Yes it's strange. 

 With clone_skb=1 we could see differences with just one GIGE interface 
 using 64 byte pkts so it might be very different on 10g.  We're getting 
 unfortunely closer to hardware...

 Cheers
					--ro