Basic HTML version of Foils prepared 17 November 98

Foil 78 Latency Measurements on Origin and Sun for MPI

From Master Foilset for HPC Achitecture Overview CPS615 Introduction to Computational Science -- Fall Semester 1998. by Geoffrey C. Fox
NASA Ames Comparison of MPI on Origin 2000 and Sun E10000
1 Origin 2000: mpirun -np 2 ./lbw -L -n 2500000 -D
2 Total transfer time: 52.597 sec.
3 Transfer rate: 47531.4 transfers/sec.
4 Message size: 40 bytes
5 Latency: 10.5 microsec.
6
7 Sun E10000: tmrun -np 2 ./lbw -L -n 2500000 -D
8 Total transfer time: 34.585 sec.
9 Transfer rate: 72286.7 transfers/sec.
10 Message size: 40 bytes
11 Latency: 6.9 microsec.
12 Note: Origin CPU about twice performance of Sun CPU
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