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RE: The ultimate TOE design

To: <hadi@xxxxxxxxxx>, "'Jeff Garzik'" <jgarzik@xxxxxxxxx>
Subject: RE: The ultimate TOE design
From: "Leonid Grossman" <leonid.grossman@xxxxxxxx>
Date: Wed, 15 Sep 2004 22:25:48 -0700
Cc: "'David S. Miller'" <davem@xxxxxxxxxxxxx>, <alan@xxxxxxxxxxxxxxxxxxx>, <paul@xxxxxxxx>, <netdev@xxxxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>
In-reply-to: <1095296279.1064.80.camel@xxxxxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
Thread-index: AcSbiENKKFilyoSbReWBeZCyQiJppwAIlPwg

> -----Original Message-----
> From: jamal [mailto:hadi@xxxxxxxxxx] 
> Sent: Wednesday, September 15, 2004 5:58 PM
> To: Jeff Garzik
> Cc: David S. Miller; alan@xxxxxxxxxxxxxxxxxxx; paul@xxxxxxxx; 
> netdev@xxxxxxxxxxx; leonid.grossman@xxxxxxxx; 
> linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: The ultimate TOE design
> Jeff,
> You are only allowed to start a TOE thread only every six months ;->
> On a serious note, I think that PCI-express (if it lives upto its
> expectation) will demolish dreams of a lot of these TOE investments.
> Our problem is NOT the CPU right now (80% idle processing 
> 450Kpps forwarding). Bus and memory distance/latency are. 

In servers, both bottlenecks are there - if you look at the cost of TCP and
filesystem processing at 10GbE, CPU is a huge problem (and will be for
foreseeable future), even for fastest 64-bit systems. 
I agree though that bus and memory are bigger issues, this is exactly the
reason for all these RDMA over Ethernet investments :-)
Anyways, did not mean to start an argument - with all the new CPU, bus and
HBA technologies coming to the market it will be another 18-24 months before
we know what works and what doesn't...

> intel would get rid of the big conspiracy in the form of 
> chipset division and just integrate the MC like AMD is, we'll 
> be on our our way to kill TOE and a lot of the network 
> processors (like the IXP). Dang, running Linux is more 
> exciting than microcoding things to fit into a 2Kword program store. 
> I rest my canadiana $.02 
> cheers,
> jamal

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