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

Mikhail Kuzminsky kus at free.net
Mon Jul 11 13:37:16 EDT 2005


In message from Alan Louis Scheinine <scheinin at crs4.it> (Mon, 11 Jul 
2005 17:40:14 +0200):
>
>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.
Sorry, do you have "node interleave memory" (in BIOS) switched off ?

Yours
Mikhail Kuzminsky 
Zelinsky Institute of Organic Chemistry
Moscow

>
>-- Alan
>
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