X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=test_rwlock_timing.c;h=3f0b0c9a51f56ee422ce7f66509f2505b51e5c54;hp=2c456581bea256c0b7b6cd8e6356260e9bf0a990;hb=102d1d236ae6c788bb543dce3de410531aca346f;hpb=70f1a35505f446f1458352b65bd6c57b8ac9307f

diff --git a/test_rwlock_timing.c b/test_rwlock_timing.c
index 2c45658..3f0b0c9 100644
--- a/test_rwlock_timing.c
+++ b/test_rwlock_timing.c
@@ -62,12 +62,15 @@ static struct test_array test_array = { 8 };
 #define INNER_READ_LOOP	100000U
 #define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP)
 
-#define WRITE_LOOP 2000U
+#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)
 {
@@ -99,17 +102,23 @@ void *thr_reader(void *arg)
 
 void *thr_writer(void *arg)
 {
-	int i;
+	int i, j;
+	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 < WRITE_LOOP; i++) {
-		pthread_rwlock_wrlock(&lock);
-		test_array.a = 8;
-		pthread_rwlock_unlock(&lock);
-		usleep(1);
+	for (i = 0; i < OUTER_WRITE_LOOP; i++) {
+		for (j = 0; j < INNER_WRITE_LOOP; j++) {
+			time1 = get_cycles();
+			pthread_rwlock_wrlock(&lock);
+			test_array.a = 8;
+			pthread_rwlock_unlock(&lock);
+			time2 = get_cycles();
+			writer_time[(unsigned long)arg] += time2 - time1;
+			usleep(1);
+		}
 	}
 
 	printf("thread_end %s, thread id : %lx, tid %lu\n",
@@ -123,7 +132,8 @@ int main()
 	pthread_t tid_reader[NR_READ], tid_writer[NR_WRITE];
 	void *tret;
 	int i;
-	cycles_t tot_time = 0;
+	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());
@@ -135,7 +145,8 @@ int main()
 			exit(1);
 	}
 	for (i = 0; i < NR_WRITE; i++) {
-		err = pthread_create(&tid_writer[i], NULL, thr_writer, NULL);
+		err = pthread_create(&tid_writer[i], NULL, thr_writer,
+				     (void *)(long)i);
 		if (err != 0)
 			exit(1);
 	}
@@ -146,15 +157,18 @@ int main()
 		err = pthread_join(tid_reader[i], &tret);
 		if (err != 0)
 			exit(1);
-		tot_time += reader_time[i];
+		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_time / ((double)NR_READ * (double)READ_LOOP));
+	       (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));
 
 	return 0;
 }