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Cisco SFS InfiniBand Host Drivers User Guide for Linux
OL-12309-01
Chapter 7 MVAPICH MPI
Intel MPI Benchmarks (IMB) Test Performance
When the test completes successfully, you see output similar to the following:
#---------------------------------------------------
# Intel (R) MPI Benchmark Suite V2.3, MPI-1 part
#---------------------------------------------------
# Date : Thu Oct 12 17:48:21 2006
# Machine : x86_64# System : Linux
# Release : 2.6.9-42.ELsmp
# Version : #1 SMP Wed Jul 12 23:32:02 EDT 2006
#
# Minimum message length in bytes: 0
# Maximum message length in bytes: 4194304
#
# MPI_Datatype : MPI_BYTE
# MPI_Datatype for reductions : MPI_FLOAT
# MPI_Op : MPI_SUM
#
# List of Benchmarks to run:
# PingPong
# PingPing
# Sendrecv
# Exchange
# Allreduce
# Reduce
# Reduce_scatter
# Allgather
# Allgatherv
# Alltoall
# Bcast
# Barrier
#---------------------------------------------------
# Benchmarking PingPong
# #processes = 2
#---------------------------------------------------
#bytes #repetitions t[usec] Mbytes/sec
0 1000 2.86 0.00
1 1000 2.86 0.33
2 1000 2.86 0.67
4 1000 2.98 1.28
8 1000 2.96 2.58
16 1000 2.97 5.14
32 1000 3.08 9.91
64 1000 3.17 19.27
128 1000 3.95 30.87
256 1000 4.28 57.03
512 1000 5.03 97.08
1024 1000 6.15 158.89
2048 1000 7.51 259.97
4096 1000 10.26 380.71
8192 1000 22.93 340.73
16384 1000 29.34 532.59
32768 1000 41.80 747.56
65536 640 66.16 944.69
131072 320 114.53 1091.41
262144 160 214.48 1165.64
524288 80 405.76 1232.25
1048576 40 792.88 1261.23
2097152 20 1570.12 1273.78
4194304 10 3113.90 1284.56
<output truncated>