93 строки
3.2 KiB
Plaintext
93 строки
3.2 KiB
Plaintext
.\" -*- nroff -*-
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.\" Copyright (c) 2015 Research Organization for Information Science
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.\" and Technology (RIST). All rights reserved.
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.\" $COPYRIGHT$
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.TH MPI_Win_create_dynamic 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
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.SH NAME
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\fBMPI_Win_create_dynamic\fP \- One-sided MPI call that returns a window object for RMA operations.
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.SH SYNTAX
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.ft R
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.SH C Syntax
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.nf
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#include <mpi.h>
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MPI_Win_create_dynamic(MPI_Info \fIinfo\fP, MPI_Comm \fIcomm\fP, MPI_Win *\fIwin\fP)
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.fi
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.SH Fortran Syntax
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.nf
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USE MPI
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! or the older form: INCLUDE 'mpif.h'
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MPI_WIN_CREATE_DYNAMIC(\fIINFO, COMM, WIN, IERROR\fP)
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INTEGER \fIINFO, COMM, WIN, IERROR\fP
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.fi
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.SH Fortran 2008 Syntax
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.nf
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USE mpi_f08
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MPI_Win_create_dynamic(\fIinfo\fP, \fIcomm\fP, \fIwin\fP, \fIierror\fP)
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TYPE(MPI_Info), INTENT(IN) :: \fIinfo\fP
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TYPE(MPI_Comm), INTENT(IN) :: \fIcomm\fP
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TYPE(MPI_Win), INTENT(OUT) :: \fIwin\fP
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INTEGER, OPTIONAL, INTENT(OUT) :: \fIierror\fP
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.fi
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.SH INPUT PARAMETERS
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.ft R
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.TP 1i
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info
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Info argument (handle).
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.TP 1i
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comm
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Communicator (handle).
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.SH OUTPUT PARAMETERS
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.ft R
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.TP 1i
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win
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Window object returned by the call (handle).
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.TP 1i
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IERROR
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Fortran only: Error status (integer).
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.SH DESCRIPTION
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.ft R
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MPI_Win_create_dynamic is a one-sided MPI communication collective call executed by all processes in the group of \fIcomm\fP. It returns a window object without memory attached that can be used by these processes to perform RMA operations.
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.sp
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The following info keys are supported:
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.ft R
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.TP 1i
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no_locks
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If set to \fItrue\fP, then the implementation may assume that the local
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window is never locked (by a call to MPI_Win_lock or
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MPI_Win_lock_all). Setting this value if only active synchronization
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may allow the implementation to enable certain optimizations.
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.sp
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.TP 1i
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accumulate_ordering
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By default, accumulate operations from one initiator to one target on
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the same window are strictly ordered. If the info key
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accumulate_ordering is set to \fInone\fP, no ordering of accumulate
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operations guaranteed. They key can also be a comma-separated list of
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required orderings consisting of \fIrar\fP, \fIwar\fP, \fIraw\fP, and \fIwaw\fP for
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read-after-read, write-after-read, read-after-write, and
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write-after-write, respectively. Looser ordering constraints are
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likely to result in improved performance.
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.sp
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.TP 1i
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accumulate_ops
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If set to \fIsame_op\fP, the implementation will assume that all concurrent
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accumulate calls to the same target address will use the same
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operation. If set to \fIsame_op_no_op\fP, then the implementation will
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assume that all concurrent accumulate calls to the same target address
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will use the same operation or MPI_NO_OP. The default is \fIsame_op_no_op\fP.
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.SH ERRORS
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Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument.
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.sp
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Before the error value is returned, the current MPI error handler is
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called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.
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