static unsigned long duration;
+/* read-side C.S. duration, in loops */
+static unsigned long rduration;
+
+static inline void loop_sleep(unsigned long l)
+{
+ while(l-- != 0)
+ cpu_relax();
+}
+
/*
* returns 0 if test should end.
*/
for (;;) {
pthread_mutex_lock(&per_thread_lock[tidx].lock);
assert(test_array.a == 8);
+ if (unlikely(rduration))
+ loop_sleep(rduration);
pthread_mutex_unlock(&per_thread_lock[tidx].lock);
nr_reads++;
if (unlikely(!test_duration_read()))
printf(" [-r] [-w] (yield reader and/or writer)");
#endif
printf(" [-d delay] (writer period (us))");
+ printf(" [-c duration] (reader C.S. duration (in loops))");
printf(" [-a cpu#] [-a cpu#]... (affinity)");
printf("\n");
}
use_affinity = 1;
printf("Adding CPU %d affinity\n", a);
break;
+ case 'c':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ return -1;
+ }
+ rduration = atoi(argv[++i]);
+ break;
case 'd':
if (argc < i + 2) {
show_usage(argc, argv);
printf("running test for %lu seconds, %u readers, %u writers.\n",
duration, nr_readers, nr_writers);
printf("Writer delay : %u us.\n", wdelay);
+ printf("Reader duration : %lu loops.\n", rduration);
printf("thread %-6s, thread id : %lx, tid %lu\n",
"main", pthread_self(), (unsigned long)gettid());