HP-MPI User's Guide (11th Edition)

Understanding HP-MPI
MPI options
Chapter 3146
Miscellaneous environment variables
MPI_2BCOPY Point-to-point bcopy() is disabled by setting MPI_2BCOPY
to 1. Valid on PA-RISC only.
MPI_MAX_WINDOW MPI_MAX_WINDOW is used for one-sided applications. It
specifies the maximum number of windows a rank can have at the same
time. It tells HP-MPI to allocate enough table entries. The default is 5.
% export MPI_MAX_WINDOW=10
The above example allows 10 windows to be established for one-sided
communication.
Diagnostic/debug environment variables
MPI_DLIB_FLAGS MPI_DLIB_FLAGS controls runtime options when you
use the diagnostics library. The MPI_DLIB_FLAGS syntax is a comma
separated list as follows:
[ns,][h,][strict,][nmsg,][nwarn,][dump:prefix,]
[dumpf:prefix][xNUM]
where
ns Disables message signature analysis.
h Disables default behavior in the diagnostic library that
ignores user specified error handlers. The default
considers all errors to be fatal.
strict Enables MPI object-space corruption detection. Setting
this option for applications that make calls to routines
in the MPI-2 standard may produce false error
messages.
nmsg Disables detection of multiple buffer writes during
receive operations and detection of send buffer
corruptions.
nwarn Disables the warning messages that the diagnostic
library generates by default when it identifies a receive
that expected more bytes than were sent.
dump:prefix Dumps (unformatted) all sent and received messages to
prefix.msgs.rank where rank is the rank of a specific
process.