HP-MPI Version 2.2 for HP-UX Release Note

HP-MPI V2.2 for HP-UX Release Note

What’s in This Version

% mpiCC sort.C -mpiCClib /scratch/libmpicc/libmpiCC.a

New mpirun command line launch options

HP-MPI 2.2 supports these new mpirun command line launch options.

Four new options are provided for command line job launching of the same executable across a

collection of hosts. These four options are:

• -hostlist <quoted-host-list>

• -hostfile <filename>

• -lsb_hosts

• -lsb_mcpu_hosts

Each of the above arguments may be combined with an optional rank count '-np N' which, if

present, will select exactly N ranks. The ranks are selected by traversing the

list|file|env-vars of hosts in order with wraparound if the requested number of ranks

exceeds the number of hosts. If the number of desired ranks is not specified, then the

list|file|env-vars are traversed once to produce a complete list of hosts.

-hostlist <quoted-host-list> where <quoted-host-list> is one or more hosts separated

by spaces or commas and hosts can have a trailing count designated with :<N> or a trailing

count.

-hostlist ''n1:4 n2 2''

# 4 ranks will be launched on n1 and 2 ranks on n2.

-hostlist ''n2:2 4 n3''

# 8 ranks will be launched on n2 and 1 rank on n3.

-np 12 -hostlist ''n2:2 4 n3''

# 8 ranks on n2, 1 rank on n3, 3 ranks on n2 due to wraparound.

-np 3 -hostlist ''n2:2 n3:4''

# 2 ranks on n2, 1 on n3 since -np overrides.

-hostfile <filename> is a text file with hostnames separated by spaces or new lines. Each

hostname may have an optional count field.

Assuming hfile contains

n1 2

#n2

n3 3

-np 4 -hostfile hfile

# 2 ranks on n1 and 2 ranks on n3.