AMD Opteron memory bandwidth (was Re: CPUs for a Beowulf)

Donald Becker becker at scyld.com
Tue Sep 9 01:06:28 EDT 2003


On Mon, 8 Sep 2003, Jim Phillips wrote:

> > Gee, suddenly the system starts looking like a cluster.  Sure, the
> > application can now use global shared memory, and it's now efficient to
> > implement a single file system view.  But all the approaches to making a
> > cluster efficiently scalable can be directly applied to this type of
> > SMP...
> 
> If you could connect those HyperTransport channels into a scalable mesh
> then this sounds a lot like the good old Cray T3E design.  Drool...  It's
> too bad that Red Storm won't be taking that route.  The T3E was so nice.

For those unfamiliar with the history and relationship
  The Cray T3D/T3E used Alphas, EV4 and EV5 generations
  HT was designed as the communication architecture for the
    EV7+ generation Alpha processor.
  AMD bought the HT technology from API, Alpha Processor Inc., later API
  Networks just before shutting down.

-- 
Donald Becker				becker at scyld.com
Scyld Computing Corporation		http://www.scyld.com
914 Bay Ridge Road, Suite 220		Scyld Beowulf cluster system
Annapolis MD 21403			410-990-9993

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