CPU consumption under Alpha Linux
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Cabaniols, Sebastien Sebastien.Cabaniols at compaq.comTue Oct 31 01:58:19 PST 2000
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Hi I am planning to measure the CPU consumption of some MPI code. I know I can use the getrusage C function but I don't have enough granularity: tools such as top, vmstat are doing an average over one second ! It is easy to measure time with a high precision using MPI_Wtime as it is using (at least on the implementation I am using) the rpcc alpha assembler function and cost pretty much nothing with a very good precision (less than 10 nanoseconds) but then I don't have any ideas about the cpu consumption. Any ideas ? Thanks in advance Sébastien Cabaniols Compaq Custom System
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