HPL_all_reduce - Man Page
All reduce operation.
Synopsis
#include "hpl.h"
int HPL_all_reduce( void * BUFFER, const int COUNT, const HPL_T_TYPE DTYPE, const HPL_T_OP OP, MPI_Comm COMM );
Description
HPL_all_reduce performs a global reduce operation across all processes of a group leaving the results on all processes.
Arguments
- BUFFER (local input/global out void *
On entry, BUFFER points to the buffer to be combined. On exit, this array contains the combined data and is identical on all processes in the group.
- COUNT (global input) const int
On entry, COUNT indicates the number of entries in BUFFER. COUNT must be at least zero.
- DTYPE (global input) const HPL_T_TYPE
On entry, DTYPE specifies the type of the buffers operands.
- OP (global input) const HPL_T_OP
On entry, OP is a pointer to the local combine function.
- COMM (global/local input) MPI_Comm
The MPI communicator identifying the process collection.
See Also
HPL_broadcast (3), HPL_reduce (3), HPL_barrier (3), HPL_min (3), HPL_max (3), HPL_sum (3).
Referenced By
HPL_barrier(3), HPL_broadcast(3), HPL_max(3), HPL_min(3), HPL_reduce(3), HPL_sum(3).