[Beowulf] [gorelsky@stanford.edu: CCL:dual-core Opteron 275performance]

Gerry Creager gerry.creager at tamu.edu
Mon Jul 11 13:28:06 PDT 2005


Hoowa!  Excellent information.

Thanks,
Gerry

Alan Louis Scheinine wrote:
> 
> Jakob Oestergaard wrote:
>  > Guys, the results are very interesting - it would be very interesting to
>  > know, too, which kernels you have been running on.
>  > ... I'm pretty sure at least 2.6.12 had NUMA/dual-core fixes in it.
> 
> In all cases, 4 MPI processes on a machine with 4 cores (two dual-core 
> CPUs).
> 
> Meteorology program 1, "bolam"    CPU time, real time (in seconds)
>       Linux kernel 2.6.9-11.ELsmp     122        128
>       Linux kernel 2.6.12.2            64         77
> 
> Meteorology program 2, "non-hydrostatic"
>       Linux kernel 2.6.9-11.ELsmp     598        544
>       Linux kernel 2.6.12.2           430        476
> 
> The new information is the kernel 2.6.12.2 that I installed today.
> Yes, the new kernel helps quite a bit.
> 
> -- Alan
> 
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Gerry Creager -- gerry.creager at tamu.edu
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