PPT Slide

Hardware Counters (cont'd)

• For MPI:

poe hpmcount -o counter_data mycode -procs 4

• Each set contains data from 8 counters
  • some counters are duplicated between sets

• 4 data sets available
  • to specify a set, use -sn, where n is the set number
    hpmcount -o counter_data -s2 mycode
  • default is set number 1

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