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.TH "SHMEM_QUIET" "3" "Jul 22, 2024" "" "Open MPI"
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\fI\%shmem_quiet\fP(3) \- Waits for completion of all outstanding remote
writes issued by a processing element (PE).
.SH SYNOPSIS
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C or C++:
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.ft C
#include <mpp/shmem.h>

void shmem_quiet(void)
.ft P
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Fortran:
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.ft C
CALL SHMEM_QUIET
.ft P
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.SH DESCRIPTION
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\fI\%shmem_quiet\fP ensures ordering of put (remote write) operations. All put
operations issued to any processing element (PE) prior to the call to
\fI\%shmem_quiet\fP are guaranteed to be visible to all other PEs no later than
any subsequent memory load or store, remote put or get, or
synchronization operations that follow the call to \fI\%shmem_quiet\fP\&.
.SH NOTES
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\fI\%shmem_quiet\fP is most useful as a way of ensuring ordering of delivery
of several put operations. For example, you might use \fI\%shmem_quiet\fP to
await delivery of a block of data before issuing another put, which
sets a completion flag on another PE.
\fI\%shmem_quiet\fP is not usually needed if \fI\%shmem_barrier_all\fP(3) or
\fI\%shmem_barrier\fP(3) are called. The barrier routines all wait for the
completion of outstanding remote writes (puts).
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.SH EXAMPLES
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.ft C
PROGRAM COMPFLAG
  INCLUDE "mpp/shmem.fh"

  INTEGER FLAG_VAR, ARRAY(100), RECEIVER, SENDER
  COMMON/FLAG/FLAG_VAR
  COMMON/DATA/ARRAY
  INTRINSIC MY_PE

  FLAG_VAR = 0
  CALL SHMEM_BARRIER_ALL ! wait for FLAG_VAR to be initialized
  SENDER = 0                        ! PE 0 sends the data
  RECEIVER = 1                      ! PE 1 receives the data

  IF (MY_PE() .EQ. 0) THEN
    ARRAY = 33
    CALL SHMEM_PUT(ARRAY, ARRAY, 100, RECEIVER) ! start sending data
    CALL SHMEM_QUIET                ! wait for delivery
    CALL SHMEM_PUT(FLAG_VAR, 1, 1, RECEIVER) ! send completion flag
  ELSE IF (MY_PE() .EQ. RECEIVER) THEN
    CALL SHMEM_UDCFLUSH
    CALL SHMEM_WAIT(FLAG_VAR, 0)
    PRINT *,ARRAY                       ! ARRAY has been delivered
  ENDIF
END
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\fBSEE ALSO:\fP
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\fIintro_shmem\fP(3) \fI\%shmem_barrier\fP(3) \fI\%shmem_barrier_all\fP(3)
\fIshmem_fence\fP(3) \fIshmem_put\fP(3) \fIshmem_wait\fP(3)
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.SH COPYRIGHT
2003-2024, The Open MPI Community
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