X-Git-Url: http://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=test_urcu_timing.c;h=8577b8f092e472f2e25fc5e0e4c10d070320a949;hp=6b4aac8b12de0aeaf2f317c6408cc19d37be7d74;hb=538d7df5086144837beb7a9c1e2a94eb637b9904;hpb=fc606a745f2825aff6c615e5d6703526e170906b

diff --git a/test_urcu_timing.c b/test_urcu_timing.c
index 6b4aac8..8577b8f 100644
--- a/test_urcu_timing.c
+++ b/test_urcu_timing.c
@@ -32,6 +32,9 @@
 #include <sys/syscall.h>
 #include <arch.h>
 
+/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
+#define CACHE_LINE_SIZE 4096
+
 #if defined(_syscall0)
 _syscall0(pid_t, gettid)
 #elif defined(__NR_gettid)
@@ -87,11 +90,14 @@ static struct test_array *test_rcu_pointer;
 #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 int num_read;
+static int num_write;
+
+#define NR_READ num_read
+#define NR_WRITE num_write
 
-static cycles_t reader_time[NR_READ] __attribute__((aligned(128)));
-static cycles_t writer_time[NR_WRITE] __attribute__((aligned(128)));
+static cycles_t __attribute__((aligned(CACHE_LINE_SIZE))) *reader_time;
+static cycles_t __attribute__((aligned(CACHE_LINE_SIZE))) *writer_time;
 
 void *thr_reader(void *arg)
 {
@@ -167,15 +173,27 @@ void *thr_writer(void *arg)
 	return ((void*)2);
 }
 
-int main()
+int main(int argc, char **argv)
 {
 	int err;
-	pthread_t tid_reader[NR_READ], tid_writer[NR_WRITE];
+	pthread_t *tid_reader, *tid_writer;
 	void *tret;
 	int i;
 	cycles_t tot_rtime = 0;
 	cycles_t tot_wtime = 0;
 
+	if (argc < 2) {
+		printf("Usage : %s nr_readers nr_writers\n", argv[0]);
+		exit(-1);
+	}
+	num_read = atoi(argv[1]);
+	num_write = atoi(argv[2]);
+
+	reader_time = malloc(sizeof(*reader_time) * num_read);
+	writer_time = malloc(sizeof(*writer_time) * num_write);
+	tid_reader = malloc(sizeof(*tid_reader) * num_read);
+	tid_writer = malloc(sizeof(*tid_writer) * num_write);
+
 	printf("thread %-6s, thread id : %lx, tid %lu\n",
 			"main", pthread_self(), (unsigned long)gettid());
 
@@ -212,5 +230,10 @@ int main()
 	printf("Time per write : %g cycles\n",
 	       (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP));
 
+	free(reader_time);
+	free(writer_time);
+	free(tid_reader);
+	free(tid_writer);
+
 	return 0;
 }