From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mohan Sundaram <smohan@gmail.com>
Date: Wed, 23 Aug 2006 08:17:53 +0000
Subject: Re: [LARTC] New hardware
Message-Id: <44EC0C61.7010505@vsnl.com>
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To: lartc@vger.kernel.org

Marek Kierdelewicz wrote:
> Hi there,
> 
>> I used a SunFire x2100 which has 2 Ghz Opteron and PCI-Xpress slot
>> into which I plugged in a dual port gigE Intel PCI-Xpress card.
> 
> What was the software configuration of this host? What kernel
> have you used for the test (compiled for x86 or amd64; dual-core
> aware sheduler or not).
> 
stock x86 32 bit kernel 2.4.20. No dual core optimisations.
> Out of the curiosity ... dual port nic generates one interrupt or two
> per port? I asume the first is more probable. This leads to another
> question - has interrupt been balanced between cores? 
I'm unaware of how it was configured.
> 
>> Got a raw forwarding performance of 800Kpps for 64B packets. This
>> beat a CISCO 3845 which gave 600Kpps.
> 
> Thanks for the input :).
> 
> Right now my production border router (BGP+some firewall rules+some QoS,
> vlans @ P4 3GHz Linux 2.6, 2xBroadcom PCI-X, 1xIntel E1000 PCI-X) is 91%
> saturated (CPU) at peek hours and during the time it forwards 344,8Kpps
> with avg. packet sized 69 bytes.
> 
The Opteron was 100% utilised at 800Kpps for 64B pkts. I could do 
bi-directional line rate on gigE for 512/1500B pkts (approx 500/164Kpps) 
  with 65%/25% cpu utilisation
> I'll try to determine raw forwarding performance when box goes out
> of production env, so we'll have a clear comparison picture.
> 
> regards,

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