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