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why MPI CPU time on different processors very different?

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发表于 2004-7-16 06:52:46 | 显示全部楼层 |阅读模式

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My MPI code runs on many processors. What confused me is thaat for a same amout of work, different processors take much different CPU time, sometimes the difference can even be 3 times. Anybody knows what I can do to make the CPU time pretty much equal on different processors? Thanks!
发表于 2004-7-16 23:14:05 | 显示全部楼层

why MPI CPU time on different processors very different?

首先确保你每个进程的计算量(网格数)相同;然后改变进程号与cpu的对应次序,看看是否是机器不同引起的问题,很可能是这个原因;最后就只能查程序的问题了
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