Initial

fsecs.c

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+/****************************
+ * High-level timing wrappers
+ ****************************/
+#include <stdio.h>
+#include "fsecs.h"
+#include "fcyc.h"
+#include "clock.h"
+#include "ftimer.h"
+#include "config.h"
+
+static double Mhz;  /* estimated CPU clock frequency */
+
+extern int verbose; /* -v option in mdriver.c */
+
+/*
+ * init_fsecs - initialize the timing package
+ */
+void init_fsecs(void)
+{
+    Mhz = 0; /* keep gcc -Wall happy */
+
+#if USE_FCYC
+    if (verbose)
+	printf("Measuring performance with a cycle counter.\n");
+
+    /* set key parameters for the fcyc package */
+    set_fcyc_maxsamples(20); 
+    set_fcyc_clear_cache(1);
+    set_fcyc_compensate(1);
+    set_fcyc_epsilon(0.01);
+    set_fcyc_k(3);
+    Mhz = mhz(verbose > 0);
+#elif USE_ITIMER
+    if (verbose)
+	printf("Measuring performance with the interval timer.\n");
+#elif USE_GETTOD
+    if (verbose)
+	printf("Measuring performance with gettimeofday().\n");
+#endif
+}
+
+/*
+ * fsecs - Return the running time of a function f (in seconds)
+ */
+double fsecs(fsecs_test_funct f, void *argp) 
+{
+#if USE_FCYC
+    double cycles = fcyc(f, argp);
+    return cycles/(Mhz*1e6);
+#elif USE_ITIMER
+    return ftimer_itimer(f, argp, 10);
+#elif USE_GETTOD
+    return ftimer_gettod(f, argp, 10);
+#endif 
+}
+
+