Added throughput for ck_barrier_centralized.

regressions/ck_barrier/benchmark/Makefile

@@ -0,0 +1,15 @@
+.PHONY: clean distribution
+
+OBJECTS=throughput
+
+all: $(OBJECTS)
+
+throughput: throughput.c ../../../include/ck_barrier.h
+	$(CC) $(CFLAGS) -o throughput throughput.c -lpthread
+
+clean:
+	rm -rf *.dSYM *~ *.o $(OBJECTS)
+
+include ../../../build/regressions.build
+CFLAGS+=-D_GNU_SOURCE -O0 -ggdb
+

regressions/ck_barrier/benchmark/throughput.c

@@ -0,0 +1,119 @@
+/*
+ * 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"
+
+static int done = 0;
+static unsigned int count = 0;
+static struct affinity a;
+static int nthr;
+static ck_barrier_centralized_t barrier = CK_BARRIER_CENTRALIZED_INITIALIZER;
+
+static void *
+thread(void *null CK_CC_UNUSED)
+{
+	ck_barrier_centralized_state_t state = CK_BARRIER_CENTRALIZED_STATE_INITIALIZER;
+	unsigned int counter = 0;
+
+	aff_iterate(&a);
+
+	while (ck_pr_load_int(&done) == 0) {
+		ck_barrier_centralized(&barrier, &state, nthr);
+		++counter;
+		ck_barrier_centralized(&barrier, &state, nthr);
+		++counter;
+		ck_barrier_centralized(&barrier, &state, nthr);
+		++counter;
+		ck_barrier_centralized(&barrier, &state, nthr);
+		++counter;
+		ck_barrier_centralized(&barrier, &state, nthr);
+		++counter;
+		ck_barrier_centralized(&barrier, &state, nthr);
+		++counter;
+		ck_barrier_centralized(&barrier, &state, nthr);
+		++counter;
+		ck_barrier_centralized(&barrier, &state, nthr);
+		++counter;
+	}
+
+	ck_pr_add_uint(&count, counter);
+	return (NULL);
+}
+
+int
+main(int argc, char *argv[])
+{
+	pthread_t *threads;
+	int i;
+
+	if (argc != 3) {
+		fprintf(stderr, "Correct usage: <number of threads> <affinity delta>\n");
+		exit(EXIT_FAILURE);
+	}
+
+	nthr = atoi(argv[1]);
+        if (nthr <= 0) { 
+                fprintf(stderr, "ERROR: Number of threads must be greater than 0\n"); 
+                exit(EXIT_FAILURE); 
+        } 
+ 
+        threads = malloc(sizeof(pthread_t) * nthr); 
+        if (threads == NULL) { 
+                fprintf(stderr, "ERROR: Could not allocate thread structures\n"); 
+                exit(EXIT_FAILURE); 
+        } 
+ 
+        a.delta = atoi(argv[2]); 
+ 
+        fprintf(stderr, "Creating threads (barrier)..."); 
+        for (i = 0; i < nthr; ++i) { 
+                if (pthread_create(&threads[i], NULL, thread, NULL)) { 
+                        fprintf(stderr, "ERROR: Could not create thread %d\n", i); 
+                        exit(EXIT_FAILURE); 
+                } 
+        } 
+        fprintf(stderr, "done\n"); 
+
+	sleep(10);
+
+	ck_pr_store_int(&done, 1);
+	for (i = 0; i < nthr; ++i) 
+		pthread_join(threads[i], NULL);
+	printf("%d %16" PRIu64 "\n", nthr, count);
+
+	return (0);
+}
+