shmem_udcflush.3.rst

shmem_udcflush

:ref:`shmem_clear_cache_inv`(3), :ref:`shmem_set_cache_inv`(3), :ref:`shmem_set_cache_line_inv`(3), :ref:`shmem_udcflush`(3), :ref:`shmem_udcflush_line`(3) - Controls data cache utilities

SYNOPSIS

C or C++:

#include <mpp/shmem.h>

void shmem_clear_cache_inv(void)
void shmem_clear_cache_line_inv(void *target)
void shmem_set_cache_inv(void)
void shmem_set_cache_line_inv(void *target)
void shmem_udcflush(void)
void shmem_udcflush_line(void *target)

Fortran:

INCLUDE "mpp/shmem.fh"

CALL SHMEM_CLEAR_CACHE_INV
CALL SHMEM_CLEAR_CACHE_LINE_INV(target)
CALL SHMEM_SET_CACHE_INV
CALL SHMEM_SET_CACHE_LINE_INV(target)

CALL SHMEM_UDCFLUSH
CALL SHMEM_UDCFLUSH_LINE(target)

DESCRIPTION

The following argument is passed to the cache line control routines:

target

A data object that is local to the processing element (PE). target can be of any noncharacter type. If you are using Fortran, it can be of any kind.

:ref:`shmem_clear_cache_inv` disables automatic cache coherency mode previously enabled by :ref:`shmem_set_cache_inv` or :ref:`shmem_set_cache_line_inv`.

:ref:`shmem_clear_cache_line_inv` disables automatic cache coherency mode for the cache line associated with the address of target only.

:ref:`shmem_set_cache_inv` enables the OpenSHMEM API to automatically decide the best strategy for cache coherency.

:ref:`shmem_set_cache_line_inv` enables automatic cache coherency mode for the cache line associated with the address of target only.

:ref:`shmem_clear_cache_inv` disables automatic cache coherency mode previously enabled by :ref:`shmem_set_cache_inv` or :ref:`shmem_set_cache_line_inv`.

:ref:`shmem_udcflush` makes the entire user data cache coherent.

:ref:`shmem_udcflush_line` makes coherent the cache line that corresponds with the address specified by target.

NOTES

These routines have been retained for improved backward compatibility with legacy architectures.

.. seealso::
   *intro_shmem*\ (3) *shmem_put*\ (3) *shmem_swap*\ (3)