CPU consumption under Alpha Linux
Sebastien.Cabaniols at compaq.com
Tue Oct 31 01:58:19 PST 2000
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
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
Compaq Custom System
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