[CP2K:636] Re: cp2k speedup on multicore machines

Fawzi Mohamed fa... at gmx.ch
Fri Jan 25 14:06:13 UTC 2008

>>> The em64t is equipped with 8MB of ram. Don't know if this can be a
>>> bottleneck with 256 waters.

well 8MB RAM is for sure a bottleneck ;)
8GB should not, but, well 6 Hours for 10 steps... maybe it did swap,  
and if you swap then everything is over, do check, if memory  
consumption is more than your physical memory the cpu usage drops  
drastically, again in top you should see this.

Use a smaller system, if this is the problem, the 32 water should  
already scale well...

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