Samy Al Bahra
9 years ago
parent
fb5abc52ba
commit
968b56598b
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/*
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* Copyright 2010-2015 Samy Al Bahra.
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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 <assert.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <ck_cc.h>
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#include <ck_pr.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <string.h>
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#include <ck_epoch.h>
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#include <ck_stack.h>
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#include "../../common.h"
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static unsigned int n_rd;
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static unsigned int n_wr;
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static unsigned int n_threads;
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static unsigned int barrier;
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static unsigned int leave;
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#ifndef PAIRS_S
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#define PAIRS_S 10000
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#endif
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#ifndef CK_EPOCH_T_DEPTH
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#define CK_EPOCH_T_DEPTH 8
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#endif
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static ck_epoch_t epoch;
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static struct affinity a;
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static void *
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read_thread(void *unused CK_CC_UNUSED)
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{
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ck_epoch_record_t record CK_CC_CACHELINE;
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unsigned long long i = 0;
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ck_epoch_register(&epoch, &record);
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if (aff_iterate(&a)) {
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perror("ERROR: failed to affine thread");
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exit(EXIT_FAILURE);
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}
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ck_pr_inc_uint(&barrier);
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while (ck_pr_load_uint(&barrier) < n_threads);
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for (;;) {
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ck_epoch_section_t section[2];
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ck_epoch_section_t junk[CK_EPOCH_T_DEPTH];
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unsigned int j;
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ck_epoch_begin(&record, §ion[0]);
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for (j = 0; j < CK_EPOCH_T_DEPTH; j++)
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ck_epoch_begin(&record, &junk[j]);
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for (j = 0; j < CK_EPOCH_T_DEPTH; j++)
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ck_epoch_end(&record, &junk[j]);
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if (i > 0)
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ck_epoch_end(&record, §ion[1]);
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/* Wait for the next synchronize operation. */
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while ((ck_pr_load_uint(&epoch.epoch) & 1) ==
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section[0].bucket) {
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i++;
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if (!(i % 10000000)) {
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fprintf(stderr, "%u %u %u\n",
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ck_pr_load_uint(&epoch.epoch),
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section[0].bucket, record.epoch);
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}
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while ((ck_pr_load_uint(&epoch.epoch) & 1) ==
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section[0].bucket)
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ck_pr_stall();
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}
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ck_epoch_begin(&record, §ion[1]);
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assert(section[0].bucket != section[1].bucket);
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ck_epoch_end(&record, §ion[0]);
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assert(ck_pr_load_uint(&record.active) > 0);
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if (ck_pr_load_uint(&leave) == 1) {
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ck_epoch_end(&record, §ion[1]);
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break;
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}
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i++;
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}
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return NULL;
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}
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static void *
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write_thread(void *unused CK_CC_UNUSED)
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{
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ck_epoch_record_t record;
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unsigned long iterations = 0;
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ck_epoch_register(&epoch, &record);
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if (aff_iterate(&a)) {
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perror("ERROR: failed to affine thread");
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exit(EXIT_FAILURE);
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}
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ck_pr_inc_uint(&barrier);
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while (ck_pr_load_uint(&barrier) < n_threads);
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for (;;) {
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if (!(iterations % 1048575))
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fprintf(stderr, ".");
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ck_epoch_synchronize(&record);
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iterations++;
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if (ck_pr_load_uint(&leave) == 1)
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break;
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}
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fprintf(stderr, "%lu iterations\n", iterations);
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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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unsigned int i;
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pthread_t *threads;
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if (argc != 4) {
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ck_error("Usage: stack <#readers> <#writers> <affinity delta>\n");
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}
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n_rd = atoi(argv[1]);
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n_wr = atoi(argv[2]);
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n_threads = n_wr + n_rd;
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a.delta = atoi(argv[3]);
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a.request = 0;
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threads = malloc(sizeof(pthread_t) * n_threads);
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ck_epoch_init(&epoch);
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for (i = 0; i < n_rd; i++)
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pthread_create(threads + i, NULL, read_thread, NULL);
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do {
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pthread_create(threads + i, NULL, write_thread, NULL);
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} while (++i < n_wr + n_rd);
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sleep(10);
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ck_pr_store_uint(&leave, 1);
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for (i = 0; i < n_threads; i++)
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pthread_join(threads[i], NULL);
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return (0);
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}
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