1 files changed, 68 insertions, 0 deletions
diff --git a/runtime/probes/bench/time.c b/runtime/probes/bench/time.c
new file mode 100644
index 00000000..fb423276
--- /dev/null
+++ b/runtime/probes/bench/time.c
@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+typedef unsigned long long uint64;
+
+struct timeval t1;
+
+void start(struct timeval *tv)
+{
+  gettimeofday (tv, NULL);
+}
+
+uint64 time_delta(struct timeval *start, struct timeval *stop)
+{
+  uint64 secs, usecs;
+  
+  secs = stop->tv_sec - start->tv_sec;
+  usecs = stop->tv_usec - start->tv_usec;
+  if (usecs < 0) {
+    secs--;
+    usecs += 1000000;
+  }
+  return secs * 1000000 + usecs;
+}
+
+uint64 stop(struct timeval *begin)
+{
+  struct timeval end;
+  gettimeofday (&end, NULL);
+  return time_delta (begin, &end);
+}
+
+
+int main()
+{
+  int fd, i;
+  char buf[1024];
+  uint64 nsecs;
+
+  system ("touch foo");
+  fd = open ("foo", O_RDWR);
+
+  start(&t1);
+  for (i = 0; i < 1000000; i++) {
+    if (read (fd, buf, 0) < 0)
+      perror("read");
+  }
+  nsecs = stop(&t1) / 1000;
+
+  printf("%lld ", nsecs);
+
+  start(&t1);
+  for (i = 0; i < 1000000; i++) {
+    if (write (fd, buf, 0) < 0)
+      perror("write");
+  }
+  nsecs = stop(&t1) / 1000;
+  close (fd);
+
+  printf("%lld\n", nsecs);
+
+  return 0;
+}