On Thu, Jun 22, 2017 at 10:04:34 -0600 Brian Dobbins wrote
On Wed, Jun 21, 2017 at 6:29 PM, Christopher Samuel
<sam...@unimelb.edu.au>
wrote:
I thought it interesting that the only performance info in that
article
for Epyc were SpecINT and (the only mention for SpecFP was for
Radeon).
As did I, but a little digging shows a STREAM benchmark (on AMD's page)
showing +25% performance of a single-socket Epyc vs. a dual-socket
E5-2690
v4 Broadwell system[1], and roughly 60% better specfp_rate2006 numbers
when
comparing socket-to-socket[2]. When I read stuff like this, I feel a
little bit like Charlie Brown going to kick the football, and *hoping*
it's
not going to get whisked away by Lucy...
If by Lucy you mean Intel, then that suspicion may have some merit.
Recall that when the Opterons first came out the major manufacturers did
not ship any systems with it for what, a year, maybe longer? I vaguely
recall SuperMicro going in quickly and Dell, HP, and IBM whistling in a
corner. Something about contractual obligations to Intel, or a desire
not to piss off Intel.
Let's see, HP shipped its first system "in the first half" of 2004.
http://www.networkworld.com/article/2330795/data-center/hp-to-ship-its-first-opteron-servers.html
while the first Opterons shipped in, um, April 2003. So yes, about a
year.
When the multiple core Opterons came out once again the big
manufacturers were slow to ship them, although in some cases it was
apparently due to supply issues:
https://www.theregister.co.uk/2007/11/06/ibm_opteron_x3455/
Regards,
David Mathog
mat...@caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech
_______________________________________________
Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
