SHMEM_IGET(3)SHMEM_IGET(3)NAME
shmem_complex_iget, shmem_double_iget, shmem_float_iget, shmem_iget4,
shmem_iget8, shmem_iget32, shmem_iget64, shmem_iget128,
shmem_int_iget, shmem_integer_iget, shmem_logical_iget,
shmem_long_iget, shmem_longdouble_iget, shmem_longlong_iget,
shmem_real_iget, shmem_short_iget - Transfers strided data from a
specified processing element (PE)
SYNOPSIS
C or C++:
#include <mpp/shmem.h>
void shmem_double_iget(double *target, const double *source,
ptrdiff_t tst, ptrdiff_t sst, size_t len, int pe);
void shmem_float_iget(float *target, const float *source, ptrdiff_t
tst, ptrdiff_t sst, size_t len, int pe);
void shmem_iget32(void *target, const void *source, ptrdiff_t tst,
ptrdiff_t sst, size_t len, int pe);
void shmem_iget64(void *target, const void *source, ptrdiff_t tst,
ptrdiff_t sst, size_t len, int pe);
void shmem_iget128(void *target, const void *source, ptrdiff_t tst,
ptrdiff_t sst, size_t len, int pe);
void shmem_int_iget(int *target, const int *source, ptrdiff_t tst,
ptrdiff_t sst, size_t len, int pe);
void shmem_long_iget(long *target, const long *source, ptrdiff_t
tst, ptrdiff_t sst, size_t len, int pe);
void shmem_longdouble_iget(long double *target, const long double
*source, ptrdiff_t tst, ptrdiff_t sst, size_t len, int pe);
void shmem_longlong_iget(long long *target, const long long
*source, ptrdiff_t tst, ptrdiff_t sst, size_t len, int pe);
void shmem_short_iget(short *target, const short *source, ptrdiff_t
tst, ptrdiff_t sst, size_t len, int pe);
Fortran:
INTEGER tst, sst, len, pe
CALL SHMEM_COMPLEX_IGET(target, source, tst, sst, len, pe)
CALL SHMEM_DOUBLE_IGET(target, source, tst, sst, len, pe)
CALL SHMEM_IGET4(target, source, tst, sst, len, pe)
CALL SHMEM_IGET8(target, source, tst, sst, len, pe)
CALL SHMEM_IGET32(target, source, tst, sst, len, pe)
CALL SHMEM_IGET64(target, source, tst, sst, len, pe)
CALL SHMEM_IGET128(target, source, tst, sst, len, pe)
CALL SHMEM_INTEGER_IGET(target, source, tst, sst, len, pe)
CALL SHMEM_LOGICAL_IGET(target, source, tst, sst, len, pe)
CALL SHMEM_REAL_IGET(target, source, tst, sst, len, pe)
DESCRIPTION
The iget routines provide a high-performance method for copying a
strided array from the a specified remote PE to a local strided array.
The routines return when the data has been copied into the local
target array.
The arguments are as follows:
target Array to be updated on the local PE.
source Array containing the data to be copied on the remote PE.
tst The stride between consecutive elements of the target array.
The stride is scaled by the element size of the target
array. A value of 1 indicates contiguous data. tst must be
of type integer. If you are calling from Fortran, it must
be a default integer value.
sst The stride between consecutive elements of the source array.
The stride is scaled by the element size of the source
array. A value of 1 indicates contiguous data. sst must be
of type integer. If you are calling from Fortran, it must
be a default integer value.
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 typing constraints,
which are as follows:
Routine Data Type of target and source
shmem_iget32, shmem_iget4 Any noncharacter type that has a storage
size equal to 32 bits.
shmem_iget64, shmem_iget8 Any noncharacter type that has a storage
size equal to 64 bits.
shmem_iget128 Any noncharacter type that has a storage
size equal to 128 bits.
shmem_short_iget Elements of type short.
shmem_int_iget Elements of type int.
shmem_long_iget Elements of type long.
shmem_longlong_iget Elements of type long long.
shmem_float_iget Elements of type float.
shmem_double_iget Elements of type double.
shmem_longdouble_iget Elements of type long double.
SHMEM_COMPLEX_IGET Elements of type complex of default
size.
SHMEM_DOUBLE_IGET (Fortran) Elements of type double precision.
SHMEM_INTEGER_IGET Elements of type integer.
SHMEM_LOGICAL_IGET Elements of type logical.
SHMEM_REAL_IGET 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).
NOTES
See intro_shmem(3) for a definition of the term remotely accessible.
EXAMPLES
The following simple example uses shmem_logical_iget in a Fortran
program. Compile this example with the -lsma compiler option.
PROGRAM STRIDELOGICAL
LOGICAL SOURCE(10), TARGET(5)
SAVE SOURCE ! SAVE MAKES IT REMOTELY ACCESSIBLE
DATA SOURCE /.T.,.F.,.T.,.F.,.T.,.F.,.T.,.F.,.T.,.F./
DATA TARGET / 5*.F. /
CALL START_PES(2)
IF (MY_PE() .EQ. 0) THEN
CALL SHMEM_LOGICAL_IGET(TARGET, SOURCE, 1, 2, 5, 1)
PRINT*,'TARGET AFTER SHMEM_LOGICAL_IGET:',TARGET
ENDIF
CALL SHMEM_BARRIER_ALL
END
SEE ALSOintro_shmem(3), shmem_get(3), shmem_quiet(3)
Message Passing Toolkit: MPI Programmer's Manual
