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142 lines
4.1 KiB
142 lines
4.1 KiB
/*
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* Copyright 2011 David Joseph.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <pthread.h>
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#include <unistd.h>
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#include <ck_stdint.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ck_pr.h>
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#include <ck_barrier.h>
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#include "../../common.h"
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#if defined(CK_F_PR_INC_64) && defined(CK_F_PR_LOAD_64)
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static int done = 0;
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static struct affinity a;
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static int nthr;
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static int tid;
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static ck_barrier_centralized_t barrier = CK_BARRIER_CENTRALIZED_INITIALIZER;
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struct counter {
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uint64_t value;
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} CK_CC_CACHELINE;
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struct counter *counters;
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static void *
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thread(void *null CK_CC_UNUSED)
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{
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ck_barrier_centralized_state_t state = CK_BARRIER_CENTRALIZED_STATE_INITIALIZER;
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int id;
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id = ck_pr_faa_int(&tid, 1);
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aff_iterate(&a);
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while (ck_pr_load_int(&done) == 0) {
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ck_barrier_centralized(&barrier, &state, nthr);
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ck_pr_inc_64(&counters[id].value);
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ck_barrier_centralized(&barrier, &state, nthr);
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ck_pr_inc_64(&counters[id].value);
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ck_barrier_centralized(&barrier, &state, nthr);
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ck_pr_inc_64(&counters[id].value);
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ck_barrier_centralized(&barrier, &state, nthr);
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ck_pr_inc_64(&counters[id].value);
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ck_barrier_centralized(&barrier, &state, nthr);
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ck_pr_inc_64(&counters[id].value);
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ck_barrier_centralized(&barrier, &state, nthr);
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ck_pr_inc_64(&counters[id].value);
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ck_barrier_centralized(&barrier, &state, nthr);
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ck_pr_inc_64(&counters[id].value);
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ck_barrier_centralized(&barrier, &state, nthr);
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ck_pr_inc_64(&counters[id].value);
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}
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return (NULL);
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}
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int
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main(int argc, char *argv[])
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{
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pthread_t *threads;
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uint64_t count;
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int i;
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if (argc != 3) {
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fprintf(stderr, "Correct usage: <number of threads> <affinity delta>\n");
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exit(EXIT_FAILURE);
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}
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nthr = atoi(argv[1]);
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if (nthr <= 0) {
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fprintf(stderr, "ERROR: Number of threads must be greater than 0\n");
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exit(EXIT_FAILURE);
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}
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threads = malloc(sizeof(pthread_t) * nthr);
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if (threads == NULL) {
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fprintf(stderr, "ERROR: Could not allocate thread structures\n");
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exit(EXIT_FAILURE);
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}
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counters = calloc(sizeof(struct counter), nthr);
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if (counters == NULL) {
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fprintf(stderr, "ERROR: Could not allocate counters\n");
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exit(EXIT_FAILURE);
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}
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a.delta = atoi(argv[2]);
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fprintf(stderr, "Creating threads (barrier)...");
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for (i = 0; i < nthr; ++i) {
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if (pthread_create(&threads[i], NULL, thread, NULL)) {
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fprintf(stderr, "ERROR: Could not create thread %d\n", i);
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exit(EXIT_FAILURE);
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}
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}
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fprintf(stderr, "done\n");
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sleep(10);
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count = 0;
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ck_pr_store_int(&done, 1);
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for (i = 0; i < nthr; ++i)
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count += ck_pr_load_64(&counters[i].value);
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printf("%d %16" PRIu64 "\n", nthr, count);
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return (0);
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}
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#else
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int
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main(void)
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{
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fputs("Unsupported.", stderr);
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return 0;
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}
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#endif
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