33
•
the
-np
keyword to specify the number of processes
•
the number of processes (integer)
•
the host name of the local host
•
the host name of the remote host
•
the
mpi_latency
command
•
the number of times to transfer the data (integer)
•
the number of bytes to transfer (integer)
to run the latency test.
Example
The output (in the example,
6.684000
) represents the latency, in microseconds.
[root@qa-bc1-blade2 root]# /usr/local/topspin/mpi/mpich/bin/mpirun_ssh -np 2 qa-
bc1-blade2 qa-bc1-blade3 /usr/local/topspin/mpi/mpich/bin/mpi_latency 10000 1
1 6.684000