a7ea880d0a
* Minor man page tweaks * Use existing ompi_mpi_thread_requested global This commit was SVN r27308. The following Trac tickets were found above: Ticket 3309 --> https://svn.open-mpi.org/trac/ompi/ticket/3309
65 строки
2.9 KiB
Plaintext
65 строки
2.9 KiB
Plaintext
.\" Copyright 2012 Los Alamos National Security, LLC. All rights reserved.
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.\" Copyright 2006-2008 Sun Microsystems, Inc.
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.\" Copyright (c) 1996 Thinking Machines Corporation
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.TH MPI_INFO_ENV 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
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.SH NAME
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\fBMPI_INFO_ENV\fP \- Static MPI_Info object containing info about the application
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.SH DESCRIPTION
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.ft R
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The MPI-3 standard established a static MPI_Info object named \fIMPI_INFO_ENV\fP that can be used to access information about how the application was executed from the run-time.
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.SH SUPPORTED FIELDS
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.ft R
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.TP 1i
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command
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If available, the value will be set to argv[0]. Note that the value may not always be available - e.g., it is valid for a program to call MPI_Init with NULL parameters, in which case argv[0] will not be set if run as a singleton. This value will never be set in a Fortran program as the argv are not available.
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.TP 1i
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argv
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The argv given for the application. If no arguments are passed to the application, then this value will not be set. It will also not be set in the case of a singleton that calls MPI_Init with NULL parameters, or a Fortran program.
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.TP 1i
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maxprocs
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The number of processes in the job.
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.TP 1i
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soft
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Open MPI does not support the \fIsoft\fP option for specifying the number of processes to be executed, so this value is set to the same as \fImaxprocs\fP.
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.TP 1i
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host
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The name of the host this process is executing upon - the value returned from \fIgethostname()\fP.
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.TP 1i
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arch
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The architecture of the host this process is executing upon. This value indicates the underlying chip architecture (e.g., x86_64), if it can be determined.
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.TP 1i
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wdir
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The working directory at the time of process launch by mpiexec. Note that this value will not be set for processes launched as singletons as there is no reliable way for the MPI library to determine the location.
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.TP 1i
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file
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Although specified by the MPI-3 standard, no value is currently set for this field.
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.TP 1i
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thread_level
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The requested MPI thread level - note that this may differ from the \fIactual\fP MPI thread level of the application.
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.TP 1i
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ompi_num_apps
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The number of application contexts in an MPMD job.
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This is an Open MPI-specific field and value.
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.TP 1i
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ompi_np
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The number of processes in each application context, provided as a space-delimited list of integers.
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This is an Open MPI-specific field and value.
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.TP 1i
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ompi_first_rank
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The MPI rank of the first process in each application context, provided as a space-delimited list of integers
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This is an Open MPI-specific field and value.
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.TP 1i
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ompi_positioned_file_dir
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If Open MPI was asked to pre-position files, this field provides the top-level directory where those files were place.
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This is an Open MPI-specific field and value.
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.SH ERRORS
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When calling MPI_INFO_GET(3), the \fIflag\fP parameter will be set to zero (false) if a value for the field has not been set.
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.br
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.SH SEE ALSO
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.ft r
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MPI_Info_get
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