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

Donald Becker becker at
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 Computing Corporation
914 Bay Ridge Road, Suite 220		Scyld Beowulf cluster system
Annapolis MD 21403			410-990-9993

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