1 files changed, 71 insertions, 0 deletions
diff --git a/runtime/probes/bench/itest.c b/runtime/probes/bench/itest.c
new file mode 100644
index 00000000..8ac11b8f
--- /dev/null
+++ b/runtime/probes/bench/itest.c
@@ -0,0 +1,71 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <stdlib.h>
+#include <sys/resource.h>
+#include <unistd.h>
+
+typedef unsigned long long uint64;
+struct rusage rstart;
+struct timeval tstart, tstop;
+uint64 ttime = 0;
+
+void start()
+{
+  gettimeofday (&tstart, NULL);
+  getrusage (RUSAGE_SELF, &rstart);
+}
+
+uint64 usecs (struct timeval *tv)
+{
+  return tv->tv_sec * 1000000 + tv->tv_usec;
+}
+
+uint64 stop()
+{
+  struct rusage rend;
+  getrusage (RUSAGE_SELF, &rend);
+  gettimeofday (&tstop, NULL);
+  uint64 utime = usecs(&rend.ru_utime) - usecs(&rstart.ru_utime);
+  uint64 stime = usecs(&rend.ru_stime) - usecs(&rstart.ru_stime);
+  ttime = usecs(&tstop) - usecs(&tstart);
+  return utime + stime;
+}
+
+void usage(char *name)
+{
+    printf ("Usage %s [time]\nWhere \"time\" is millions of times to loop.\n", name);
+    exit(1);
+}
+
+int main(int argc, char *argv[])
+{
+  int i, n = 1;
+  uint64 nsecs;
+
+  if (argc > 2)
+    usage(argv[0]);
+
+  if (argc == 2) {
+    n = strtol(argv[1], NULL, 10);
+    if (n == 0)
+      usage(argv[0]);
+  }
+
+
+  start();
+  for (i = 0; i < n * 1000000; i++)
+    getuid();
+
+  nsecs = stop() / (n * 1000);
+
+  /* returns 
+     nanosecs per call (user + system time)
+     elapsed usecs (real time)
+  */
+  printf("%lld %.2f\n", nsecs, ttime/1000000.0);
+
+  return 0;
+}