[Beowulf] x86-64 NUMA vs SMP kernel: appl. performance?
lindahl at pathscale.com
Fri Sep 24 15:31:10 EDT 2004
On Fri, Sep 24, 2004 at 03:04:05PM -0400, Robert G. Brown wrote:
> What compilers have you tried, and what improvements do they
As you might recall, I do work for a compiler company, so obviously that
should be kept in mind. The 3 apps mentioned by the original poster
are Gaussian, Gamess, and NWChem.
For NWChem we have a customer who reported this number for one dataset:
| Opteron-2.2+portland group:
| Total times cpu: 635.6s wall: 636.6
| Total times cpu: 514.4s wall: 515.5s
| Total times cpu: 480.8s wall: 482.3s
So that's 32% better wall time for this dataset.
Here's a customer-reported result for GAMESS:
> path CPU= 1 CPUTime= 124.84s WallTime= 126.10s
> ifort CPU= 1 CPUTime= 148.10s WallTime= 148.20s
> pgi CPU= 1 CPUTime= 224.17s WallTime= 225.60s
I can't seem to find a customer-reported result for Gaussian, although
several of our customers are running it.
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