X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=test_perthreadlock_timing.c;fp=test_perthreadlock_timing.c;h=5369796759bfa950108117c5d4a864ca6aa06721;hb=102d1d236ae6c788bb543dce3de410531aca346f;hp=0000000000000000000000000000000000000000;hpb=70f1a35505f446f1458352b65bd6c57b8ac9307f;p=urcu.git

diff --git a/test_perthreadlock_timing.c b/test_perthreadlock_timing.c
new file mode 100644
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--- /dev/null
+++ b/test_perthreadlock_timing.c
@@ -0,0 +1,190 @@
+/*
+ * test_perthreadloc_timing.c
+ *
+ * Per thread locks - test program
+ *
+ * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stdio.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <assert.h>
+#include <sys/syscall.h>
+#include <pthread.h>
+#include <arch.h>
+
+#if defined(_syscall0)
+_syscall0(pid_t, gettid)
+#elif defined(__NR_gettid)
+static inline pid_t gettid(void)
+{
+	return syscall(__NR_gettid);
+}
+#else
+#warning "use pid as tid"
+static inline pid_t gettid(void)
+{
+	return getpid();
+}
+#endif
+
+#include "urcu.h"
+
+struct test_array {
+	int a;
+};
+
+static struct test_array test_array = { 8 };
+
+struct per_thread_lock {
+	pthread_mutex_t lock;
+} __attribute__((aligned(128)));	/* cache-line aligned */
+
+static struct per_thread_lock *per_thread_lock;
+
+#define OUTER_READ_LOOP	200U
+#define INNER_READ_LOOP	100000U
+#define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP)
+
+#define OUTER_WRITE_LOOP 10U
+#define INNER_WRITE_LOOP 200U
+#define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP)
+
+#define NR_READ 10
+#define NR_WRITE 9
+
+static cycles_t reader_time[NR_READ] __attribute__((aligned(128)));
+static cycles_t writer_time[NR_WRITE] __attribute__((aligned(128)));
+
+void *thr_reader(void *arg)
+{
+	int i, j;
+	cycles_t time1, time2;
+	long tidx = (long)arg;
+
+	printf("thread_begin %s, thread id : %lx, tid %lu\n",
+			"reader", pthread_self(), (unsigned long)gettid());
+	sleep(2);
+
+	time1 = get_cycles();
+	for (i = 0; i < OUTER_READ_LOOP; i++) {
+		for (j = 0; j < INNER_READ_LOOP; j++) {
+			pthread_mutex_lock(&per_thread_lock[tidx].lock);
+			assert(test_array.a == 8);
+			pthread_mutex_unlock(&per_thread_lock[tidx].lock);
+		}
+	}
+	time2 = get_cycles();
+
+	reader_time[tidx] = time2 - time1;
+
+	sleep(2);
+	printf("thread_end %s, thread id : %lx, tid %lu\n",
+			"reader", pthread_self(), (unsigned long)gettid());
+	return ((void*)1);
+
+}
+
+void *thr_writer(void *arg)
+{
+	int i, j;
+	long tidx;
+	cycles_t time1, time2;
+
+	printf("thread_begin %s, thread id : %lx, tid %lu\n",
+			"writer", pthread_self(), (unsigned long)gettid());
+	sleep(2);
+
+	for (i = 0; i < OUTER_WRITE_LOOP; i++) {
+		for (j = 0; j < INNER_WRITE_LOOP; j++) {
+			time1 = get_cycles();
+			for (tidx = 0; tidx < NR_READ; tidx++) {
+				pthread_mutex_lock(&per_thread_lock[tidx].lock);
+			}
+			test_array.a = 8;
+			for (tidx = NR_READ - 1; tidx >= 0; tidx--) {
+				pthread_mutex_unlock(&per_thread_lock[tidx].lock);
+			}
+			time2 = get_cycles();
+			writer_time[(unsigned long)arg] += time2 - time1;
+		}
+		usleep(1);
+	}
+
+	printf("thread_end %s, thread id : %lx, tid %lu\n",
+			"writer", pthread_self(), (unsigned long)gettid());
+	return ((void*)2);
+}
+
+int main()
+{
+	int err;
+	pthread_t tid_reader[NR_READ], tid_writer[NR_WRITE];
+	void *tret;
+	int i;
+	cycles_t tot_rtime = 0;
+	cycles_t tot_wtime = 0;
+
+	printf("thread %-6s, thread id : %lx, tid %lu\n",
+			"main", pthread_self(), (unsigned long)gettid());
+
+	per_thread_lock = malloc(sizeof(struct per_thread_lock) * NR_READ);
+
+	for (i = 0; i < NR_READ; i++) {
+		pthread_mutex_init(&per_thread_lock[i].lock, NULL);
+	}
+	for (i = 0; i < NR_READ; i++) {
+		err = pthread_create(&tid_reader[i], NULL, thr_reader,
+				     (void *)(long)i);
+		if (err != 0)
+			exit(1);
+	}
+	for (i = 0; i < NR_WRITE; i++) {
+		err = pthread_create(&tid_writer[i], NULL, thr_writer,
+				     (void *)(long)i);
+		if (err != 0)
+			exit(1);
+	}
+
+	sleep(10);
+
+	for (i = 0; i < NR_READ; i++) {
+		err = pthread_join(tid_reader[i], &tret);
+		if (err != 0)
+			exit(1);
+		tot_rtime += reader_time[i];
+	}
+	for (i = 0; i < NR_WRITE; i++) {
+		err = pthread_join(tid_writer[i], &tret);
+		if (err != 0)
+			exit(1);
+		tot_wtime += writer_time[i];
+	}
+	printf("Time per read : %g cycles\n",
+	       (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP));
+	printf("Time per write : %g cycles\n",
+	       (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP));
+	free(per_thread_lock);
+
+	return 0;
+}