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Old 2011-09-02, 21:04   #4
TheJudger's Avatar
Mar 2005

11·101 Posts

Originally Posted by fivemack View Post
...but I have the belief that that will leave the processes using physical memory attached to the empty sockets, so lots and lots of inter-processor traffic.
Yes, very likely.
I don't know gnfs-lasieve, but perhaps you can use tools like 'numactl' or 'taskset' to start the processes. This works for single threaded processes aswell as for multithreaded processes as long as they don't try to deal with CPU affinity themself.
48 cores, 4 memory channels per CPU. Might be a quadsocket Opteron 61xx. Keep in mind that such a system has 8 NUMA nodes.
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