[Beowulf] Thought that this might be of interest

Vincent Diepeveen diep at xs4all.nl
Mon Nov 6 07:18:18 PST 2006

Thanks for your info, this is very helpful.

So until end 2007 the core2 annihilates any opteron system.

Except of course when you're interested in just measuring bandwidth.

So the K8L should then take over from core2 the performance reign again.

Wasn't that K8L also going to do 4 instructions per cycle like core2 is 

For my chess application of course more instructions per cycle means faster.


----- Original Message ----- 
From: "Richard Walsh" <rbw at ahpcrc.org>
To: "Vincent Diepeveen" <diep at xs4all.nl>; "Beowulf Mailing List" 
<beowulf at beowulf.org>
Sent: Monday, November 06, 2006 3:57 PM
Subject: Re: [Beowulf] Thought that this might be of interest

> Vincent Diepeveen wrote:
>> Impressive bandwidth.
>> Is this the so called 'k8h' revision which has improved SSE2 throughput?
>     The socket F series is generally referred to as K8L (revision H).  The 
> dual-core
>     is already available and is primarily a pin-count and memory 
> controller upgrade
>     (to DDR2).  Bus bandwidth is 10.67 GB/sec.
>     The impoved widths in SSE and bus to L1 and L2 cache don't make it 
> into the
>     design until the quad core (Barcelona) late Q2 next year.  This chip 
> will have
>     two memory controllers on die, although they will run at 6.4 GB/sec. 
> each, rather
>     than 10.67 each at first.
>     Here is a very complete presentation on AMD's plans over the next 
> year.
>     http://www.tacc.utexas.edu/cluster2006/Herve_Chevanne.pdf
>     In making purchasing decisions, I would consider the dual-core socket 
> F especially
>     knowing that it will be socket compatible with the quad-core chips 
> released next
>     year.  I am having trouble imagining the performance on dual-socket, 
> quad-core
>     Intel systems all working through one Northbridge even through the 
> Intel "Core"
>     design is very good.   AMD make a number of similar changes in the 
> Barcelona,
>     except it leaves the processor at onl 3-way super-scalar.
>     rbw
> -- 
> Richard B. Walsh
> "The world is given to me only once, not one existing and one
> perceived. The subject and object are but one."
> Erwin Schroedinger
> Project Manager
> Network Computing Services, Inc.
> Army High Performance Computing Research Center (AHPCRC)
> rbw at ahpcrc.org  |  612.337.3467
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