.\" -*- nroff -*-
.\" Copyright (c) 2015      University of Houston.  All rights reserved.
.\" Copyright (c) 2015      Mellanox Technologies, Inc.
.\" $COPYRIGHT$
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.TH "SHMEM\\_CACHE" "3" "Dec 18, 2020" "4.1.0" "Open MPI"
.SH NAME

\fIshmem_clear_cache_inv\fP(3),
\fIshmem_set_cache_inv\fP(3),
\fIshmem_set_cache_line_inv\fP(3),
\fIshmem_udcflush\fP(3),
\fIshmem_udcflush_line\fP(3)
\- Controls data cache utilities
.SH SYNOPSIS

C or C++:
.Vb
#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);
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Fortran:
.Vb
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)
.Ve
.SH DESCRIPTION

The following argument is passed to the cache line control routines:
.TP
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.
.PP
\fBshmem_clear_cache_inv\fP
disables automatic cache coherency mode previously
enabled by shmem_set_cache_inv or shmem_set_cache_line_inv.
.PP
\fBshmem_clear_cache_line_inv\fP
disables automatic cache coherency mode for the
cache line associated with the address of \fBtarget\fP
only.
.PP
\fBshmem_set_cache_inv\fP
enables the OpenSHMEM API to automatically decide the
best strategy for cache coherency.
.PP
\fBshmem_set_cache_line_inv\fP
enables automatic cache coherency mode for the
cache line associated with the address of \fBtarget\fP
only.
.PP
\fBshmem_clear_cache_inv\fP
disables automatic cache coherency mode previously
enabled by shmem_set_cache_inv or shmem_set_cache_line_inv.
.PP
\fBshmem_udcflush\fP
makes the entire user data cache coherent.
.PP
\fBshmem_udcflush_line\fP
makes coherent the cache line that corresponds with
the address specified by target.
.PP
.SH NOTES

These routines have been retained for improved backward compatability with legacy
architectures.
.PP
.SH SEE ALSO

\fIintro_shmem\fP(3),
\fIshmem_put\fP(3),
\fIshmem_swap\fP(3)