+#define printf_verbose(fmt, args...) \
+ do { \
+ if (verbose_mode) \
+ printf(fmt, ## args); \
+ } while (0)
+
+static int verbose_mode;
+
+struct thread_counter {
+ unsigned long long nr_loops;
+};
+
+static int nr_threads;
+static unsigned long duration;
+
+static volatile int test_go, test_stop;