Name
HPL_all_reduce 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 output)   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,
HPL_reduce,
HPL_barrier,
HPL_min,
HPL_max,
HPL_sum.