perflab added

perflab/matrix/clock.h

@@ -0,0 +1,12 @@
+/* Routines for using cycle counter */
+
+/* Start the counter */
+void start_counter(void);
+
+/* Get # cycles since counter started.  Returns 1e20 if detect timing anomaly */
+double get_counter(void);
+void make_CPU_busy(void);
+
+double mhz(int verbose);
+double CPU_Factor(void);
+//double GetCpuClock(void);