Latency Measurements on Origin and Sun for MPI

• Origin 2000: mpirun -np 2 ./lbw -L -n 2500000 -D

• Total transfer time: 52.597 sec.

• Transfer rate: 47531.4 transfers/sec.

• Message size: 40 bytes

• Latency: 10.5 microsec.

• Sun E10000: tmrun -np 2 ./lbw -L -n 2500000 -D

• Total transfer time: 34.585 sec.

• Transfer rate: 72286.7 transfers/sec.

• Message size: 40 bytes

• Latency: 6.9 microsec.

• Note: Origin CPU about twice performance of Sun CPU

Previous slide

Next slide

Back to first slide

View graphic version