Brandon Potter
118 строки
3.3 KiB
C++
118 строки
3.3 KiB
C++
/*
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* Copyright 2011 Sandia Corporation. Under the terms of Contract
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* DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government
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* retains certain rights in this software.
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*
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* Copyright (c) 2017 Intel Corporation. All rights reserved.
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* This software is available to you under the BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/*
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* reduce across PEs with roc_shmem_max_to_all()
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*
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* usage: big_reduction {-v|h}
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <roc_shmem/roc_shmem.hpp>
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using namespace rocshmem;
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#define N 128
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#define MAX(a, b) ((a) > (b)) ? (a) : (b)
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#define WRK_SIZE MAX(N / 2 + 1, ROC_SHMEM_REDUCE_MIN_WRKDATA_SIZE)
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int main(int argc, char *argv[]) {
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int i, Verbose = 0;
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char *pgm;
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long *pSync, *pWrk;
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long *src, *dst;
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if ((pgm = strrchr(argv[0], '/'))) {
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pgm++;
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} else {
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pgm = argv[0];
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}
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if (argc > 1) {
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if (strncmp(argv[1], "-v", 3) == 0) {
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Verbose = 1;
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} else if (strncmp(argv[1], "-h", 3) == 0) {
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fprintf(stderr, "usage: %s {-v(verbose)|h(help)}\n", pgm);
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roc_shmem_finalize();
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exit(1);
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}
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}
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roc_shmem_init();
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src = (long *)roc_shmem_malloc(N * sizeof(long));
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for (i = 0; i < N; i += 1) {
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src[i] = roc_shmem_my_pe() + i;
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}
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dst = (long *)roc_shmem_malloc(N * sizeof(long));
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pSync = (long *)roc_shmem_malloc(ROC_SHMEM_REDUCE_SYNC_SIZE * sizeof(long));
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for (i = 0; i < ROC_SHMEM_REDUCE_SYNC_SIZE; i += 1) {
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pSync[i] = ROC_SHMEM_SYNC_VALUE;
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}
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pWrk = (long *)roc_shmem_malloc(WRK_SIZE * sizeof(long));
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roc_shmem_barrier_all();
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roc_shmem_ctx_long_max_to_all(ROC_SHMEM_CTX_DEFAULT, dst, src, N, 0, 0,
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roc_shmem_n_pes(), pWrk, pSync);
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if (Verbose) {
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printf("%d/%d\tdst =", roc_shmem_my_pe(), roc_shmem_n_pes());
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for (i = 0; i < N; i += 1) {
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printf(" %ld", dst[i]);
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}
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printf("\n");
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}
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for (i = 0; i < N; i += 1) {
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if (dst[i] != roc_shmem_n_pes() - 1 + i) {
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printf("[%3d] Error: dst[%d] == %ld, expected %ld\n", roc_shmem_my_pe(),
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i, dst[i], roc_shmem_n_pes() - 1 + (long)i);
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roc_shmem_global_exit(1);
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}
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}
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roc_shmem_free(dst);
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roc_shmem_free(src);
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roc_shmem_free(pSync);
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roc_shmem_free(pWrk);
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roc_shmem_finalize();
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return 0;
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}
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