diff options
Diffstat (limited to 'runtime/probes/bench/time.c')
-rw-r--r-- | runtime/probes/bench/time.c | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/runtime/probes/bench/time.c b/runtime/probes/bench/time.c deleted file mode 100644 index fb423276..00000000 --- a/runtime/probes/bench/time.c +++ /dev/null @@ -1,68 +0,0 @@ -#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; -} |