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Chapter 7
MVAPICH MPI
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•
The following example shows how to run the MVAPICH MPI Latency test:
host1$ mpirun_rsh -np 2 -hostfile /tmp/hostfile \
/usr/local/topspin/mpi/mpich/bin/osu_latency
When the test completes successfully, you see output that is similar to the following:
# OSU MPI Latency Test (Version 2.2)
# Size
0
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768
65536
131072
262144
524288
1048576
2097152
4194304
Intel MPI Benchmarks (IMB) Test Performance
This section describes the IMB test performance. The IMB test executes a variety of communication
patterns across multiple nodes as a simple stress test of your MPI and installation software. The tested
patterns are as follows:
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OL-12309-01
The name of the hostfile
The latency executable name
Latency (us)
2.83
2.85
2.86
2.94
2.97
2.97
3.08
3.11
3.90
4.26
4.95
6.07
7.31
9.88
23.35
29.03
41.23
65.07
113.01
209.19
400.72
780.69
1540.19
3072.65
PingPong and PingPing: tested across pairs of nodes
Sendrecv, Exchange, Allreduce, Reduce, Reduce_scatter, Allgather, Allgatherv, Alltoall, Bcast,
Barrier: tested across multiple nodes, always using a power of 2 such as 2, 4, 8, 16.
Intel MPI Benchmarks (IMB) Test Performance
Cisco SFS InfiniBand Host Drivers User Guide for Linux
7-9
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