SHMEM_PUT(3)SHMEM_PUT(3)NAME
shmem_character_put, shmem_complex_put, shmem_double_put,
shmem_float_put, shmem_int_put, shmem_integer_put, shmem_logical_put,
shmem_long_put, shmem_longdouble_put, shmem_longlong_put, shmem_put,
shmem_put4, shmem_put8, shmem_put32, shmem_put64, shmem_put128,
shmem_putmem, shmem_real_put, shmem_short_put - Transfers data to a
specified processing element (PE)
SYNOPSIS
C or C++:
#include <mpp/shmem.h>
void shmem_double_put(double *target, const double *source, size_t
len, int pe);
void shmem_float_put(float *target, const float *source, size_t
len, int pe);
void shmem_int_put(int *target, const int *source, size_t len, int
pe);
void shmem_long_put(long *target, const long *source, size_t len,
int pe);
void shmem_longdouble_put(long double *target, const long double
*source, size_t len, int pe);
void shmem_longlong_put(long long *target, const long long *source,
size_t len, int pe);
void shmem_put(void *target, const void *source, size_t len, int
pe);
void shmem_put32(void *target, const void *source, size_t len, int
pe);
void shmem_put64(void *target, const void *source, size_t len, int
pe);
void shmem_put128(void *target, const void *source, size_t len, int
pe);
void shmem_putmem(void *target, const void *source, size_t len, int
pe);
void shmem_short_put(short *target, const short *source, size_t
len, int pe);
Fortran:
INTEGER len, pe
CALL SHMEM_CHARACTER_PUT(target, source, len, pe)
CALL SHMEM_COMPLEX_PUT(target, source, len, pe)
CALL SHMEM_DOUBLE_PUT(target, source, len, pe)
CALL SHMEM_INTEGER_PUT(target, source, len, pe)
CALL SHMEM_LOGICAL_PUT(target, source, len, pe)
CALL SHMEM_PUT(target, source, len, pe)
CALL SHMEM_PUT4(target, source, len, pe)
CALL SHMEM_PUT8(target, source, len, pe)
CALL SHMEM_PUT32(target, source, len, pe)
CALL SHMEM_PUT64(target, source, len, pe)
CALL SHMEM_PUT128(target, source, len, pe)
CALL SHMEM_PUTMEM(target, source, len, pe)
CALL SHMEM_REAL_PUT(target, source, len, pe)
DESCRIPTION
The put routines provide a high-performance method for copying a
contiguous data object from the local PE to a contiguous data object
on a different PE. The routines return when the data has been copied
out of the source array on the local PE, but not necessarily before
the data has been delivered to the remote data object.
IRIX systems systems ensure that data caches stay coherent while doing
remote data writes, so calls to cache management functions are not
needed when using the put routines.
The arguments are as follows:
target Data object to be updated on the remote PE. This data
object must be remotely accessible.
source Data object containing the data to be copied.
len Number of elements in the target and source arrays. len
must be of type integer. If you are using Fortran, it must
be a constant, variable, or array element of default integer
type.
pe PE number of the remote PE. pe must be of type integer. If
you are using Fortran, it must be a constant, variable, or
array element of default integer type.
The target and source data objects must conform to certain typing
constraints, which are as follows:
Routine Data Type of target and source
shmem_put Any noncharacter type that has a storage
size equal to 64 bits.
shmem_putmem Fortran: Any noncharacter type.
C: Any data type. len is scaled in
bytes.
shmem_put4, shmem_put32 Any noncharacter type that has a storage
size equal to 32 bits.
shmem_put8, shmem_put64 Any noncharacter type that has a storage
size equal to 64 bits.
shmem_put128 Any noncharacter type that has a storage
size equal to 128 bits.
shmem_short_put Elements of type short.
shmem_int_put Elements of type int.
shmem_long_put Elements of type long.
shmem_longlong_put Elements of type long long.
shmem_float_put Elements of type float.
shmem_double_put Elements of type double.
shmem_longdouble_put Elements of type long double.
SHMEM_CHARACTER_PUT Elements of type character. len is the
number of characters to transfer. The
actual character lengths of the source
and target variables are ignored.
SHMEM_COMPLEX_PUT Elements of type complex of default
size.
SHMEM_DOUBLE_PUT (Fortran) Elements of type double precision.
SHMEM_INTEGER_PUT Elements of type integer.
SHMEM_LOGICAL_PUT Elements of type logical.
SHMEM_REAL_PUT Elements of type real.
If you are using Fortran, data types must be of default size. For
example, a real variable must be declared as REAL, REAL*4, or
REAL(KIND=4).
EXAMPLES
The following shmem_put example is for C/C++ programs:
#include <mpp/shmem.h>
main()
{
long source[10] = { 1, 2, 3, 4, 5,
6, 7, 8, 9, 10 };
static long target[10];
start_pes(2);
if (_my_pe() == 0) {
/* put 10 words into target on PE 1 */
shmem_long_put(target, source, 10, 1);
}
shmem_barrier_all(); /* sync sender and receiver */
if (_my_pe() == 1)
shmem_udcflush(); /* not required on IRIX systems */
printf("target[0] on PE %d is %d0, _my_pe(), target[0]);
}
SEE ALSOintro_shmem(3), shmem_iput(3), shmem_quiet(3)
Message Passing Toolkit: MPI Programmer's Manual
