Ubuntu Manpages

Copyright

shmem_complex_iput(3), shmem_double_iput <#shmem-double-iput>(3), shmem_float_iput <#shmem-float-iput>(3), shmem_int_iput <#shmem-int-iput>(3), shmem_integer_iput(3), shmem_iput4(3), shmem_iput8(3), shmem_iput32 <#shmem-iput32>(3), shmem_iput64 <#shmem-iput64>(3), shmem_iput128 <#shmem-iput128>(3), shmem_logical_iput(3), shmem_long_iput <#shmem-long-iput>(3), shmem_longdouble_iput <#shmem-longdouble-iput>(3), shmem_longlong_iput <#shmem-longlong-iput>(3), shmem_real_iput(3), shmem_short_iput(3) - Transfer strided data to a specified processing element (PE).

The shmem_iput routines read the elements of a local array (source) and write them to a remote array (target) on the PE indicated by pe. These 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.

The arguments are as follows:

Array to be updated on the remote PE. This data object must be remotely accessible.
Array containing the data to be copied.
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 using Fortran, it must be a default integer value.
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 using Fortran, it must be a default integer value.
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 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:

to 32 bits.
to 64 bits.

shmem_iput128 <#shmem-iput128>: Any noncharacter type that has a storage size equal to 128 bits.

shmem_short_iput: Elements of type short.

shmem_int_iput <#shmem-int-iput>: Elements of type int.

shmem_long_iput <#shmem-long-iput>: Elements of type long.

shmem_longlong_iput <#shmem-longlong-iput>: Elements of type long long.

shmem_float_iput <#shmem-float-iput>: Elements of type float.

shmem_double_iput <#shmem-double-iput>: Elements of type double.

shmem_longdouble_iput <#shmem-longdouble-iput>: Elements of type long double.

SHMEM_COMPLEX_IPUT: Elements of type complex of default size.

SHMEM_DOUBLE_IPUT: (Fortran) Elements of type double precision.

SHMEM_INTEGER_IPUT: Elements of type integer.

SHMEM_LOGICAL_IPUT: Elements of type logical.

SHMEM_REAL_IPUT: Elements of type real.

SHMEM_LOGICAL_IPUT: Elements of type logical.

SHMEM_REAL_IPUT: 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).

See intro_shmem(3) for a definition of the term remotely accessible.

Consider the following simple shmem_long_iput <#shmem-long-iput> example for C/C++ programs.

#include <mpp/shmem.h>
main()
{
  short source[10] = { 1, 2, 3, 4, 5,
  6, 7, 8, 9, 10 };
  static short target[10];
  shmem_init();
  if (shmem_my_pe() == 0) {
    /* put 10 words into target on PE 1 */
    shmem_short_iput(target, source, 1, 2, 5, 1);
  }
  shmem_barrier_all(); /* sync sender and receiver */
  if (shmem_my_pe() == 1) {
    shmem_udcflush(); /* not required on IRIX systems */
    printf("target on PE %d is %d %d %d %d %d0, shmem_my_pe(),
    (int)target[0], (int)target[1], (int)target[2],
    (int)target[3], (int)target[4] );
  }
  shmem_barrier_all(); /* sync before exiting */
}


See also:

intro_shmem(3) shmem_iget(3) shmem_put(3) shmem_quiet(3)


2003-2026, The Open MPI Community