[Pw_forum] Performance of ESPRESSO CP on Pentium, Nocona, Opteron

Nicola Marzari marzari at MIT.EDU
Tue Oct 26 21:01:36 CEST 2004

Dear All,

we have been doing performance tests on several platforms for the
past few years - these standards tests and results could be useful
for the community at large, and so we've put them on a small web page:

In particular, we are intrigued by the fact that we cannot seem
to get a CPU performance on Opteron platforms anywhere near the
Intel. While Opterons do very well in terms of memory bus speed,
our best Opteron performance (1 CPU of a 250, 2.4 GHz) is still 75%
slower than a Nocona (1 CPU, 3.2 GHz, 1 MB cache), and 43% slower
than a PIV (1 CPU, 3.2 GHz, 512 KB cache).

We'd be very happy to keep collecting CPU timings for any of the
two tests listed above (AgI_small.j and AgI_large.j) - please follow
as closely as possible the instructions on the details needed on
CPUs and compiilers. Ultimately these numbers would make their way
to the official pages...


Prof Nicola Marzari   Department of Materials Science and Engineering
13-5066   MIT   77 Massachusetts Avenue   Cambridge MA 02139-4307 USA
tel 617.4522758  fax 617.2586534  marzari at mit.edu  http://nnn.mit.edu

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