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/*
This file is part of the SC Library.
The SC Library provides support for parallel scientific applications.
Copyright (C) 2010 The University of Texas System
Additional copyright (C) 2011 individual authors
The SC Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The SC Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the SC Library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
#include <sc_reduce.h>
int
main (int argc, char **argv)
{
int mpiret;
int mpirank, mpisize;
int i, j;
char cvalue, cresult;
int ivalue, iresult;
unsigned short usvalue, usresult;
long lvalue, lresult;
float fvalue[3], fresult[3], fexpect[3];
double dvalue, dresult;
sc_MPI_Comm mpicomm;
mpiret = sc_MPI_Init (&argc, &argv);
SC_CHECK_MPI (mpiret);
mpicomm = sc_MPI_COMM_WORLD;
mpiret = sc_MPI_Comm_size (mpicomm, &mpisize);
SC_CHECK_MPI (mpiret);
mpiret = sc_MPI_Comm_rank (mpicomm, &mpirank);
SC_CHECK_MPI (mpiret);
sc_init (mpicomm, 1, 1, NULL, SC_LP_DEFAULT);
/* test allreduce int max */
ivalue = mpirank;
sc_allreduce (&ivalue, &iresult, 1, sc_MPI_INT, sc_MPI_MAX, mpicomm);
SC_CHECK_ABORT (iresult == mpisize - 1, "Allreduce mismatch");
/* test reduce float max */
fvalue[0] = (float) mpirank;
fexpect[0] = (float) (mpisize - 1);
fvalue[1] = (float) (mpirank % 9 - 4);
fexpect[1] = (float) (mpisize >= 9 ? 4 : (mpisize - 1) % 9 - 4);
fvalue[2] = (float) (mpirank % 6);
fexpect[2] = (float) (mpisize >= 6 ? 5 : (mpisize - 1) % 6);
for (i = 0; i < mpisize; ++i) {
sc_reduce (fvalue, fresult, 3, sc_MPI_FLOAT, sc_MPI_MAX, i, mpicomm);
if (i == mpirank) {
for (j = 0; j < 3; ++j) {
SC_CHECK_ABORTF (fresult[j] == fexpect[j], /* ok */
"Reduce mismatch in %d", j);
}
}
}
/* test allreduce char min */
cvalue = (char) (mpirank % 127);
sc_allreduce (&cvalue, &cresult, 1, sc_MPI_CHAR, sc_MPI_MIN, mpicomm);
SC_CHECK_ABORT (cresult == 0, "Allreduce mismatch");
/* test reduce unsigned short min */
usvalue = (unsigned short) (mpirank % 32767);
for (i = 0; i < mpisize; ++i) {
sc_reduce (&usvalue, &usresult, 1, sc_MPI_UNSIGNED_SHORT, sc_MPI_MIN, i,
mpicomm);
if (i == mpirank) {
SC_CHECK_ABORT (usresult == 0, "Reduce mismatch");
}
}
/* test allreduce long sum */
lvalue = (long) mpirank;
sc_allreduce (&lvalue, &lresult, 1, sc_MPI_LONG, sc_MPI_SUM, mpicomm);
SC_CHECK_ABORT (lresult == ((long) (mpisize - 1)) * mpisize / 2,
"Allreduce mismatch");
/* test reduce double sum */
dvalue = (double) mpirank;
for (i = 0; i < mpisize; ++i) {
sc_reduce (&dvalue, &dresult, 1, sc_MPI_DOUBLE, sc_MPI_SUM, i, mpicomm);
if (i == mpirank) {
SC_CHECK_ABORT (dresult == ((double) (mpisize - 1)) * mpisize / 2., /* ok */
"Reduce mismatch");
}
}
sc_finalize ();
mpiret = sc_MPI_Finalize ();
SC_CHECK_MPI (mpiret);
return 0;
}
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