diff options
Diffstat (limited to 'open_issues/performance/io_system/test-lseek.c')
-rw-r--r-- | open_issues/performance/io_system/test-lseek.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/open_issues/performance/io_system/test-lseek.c b/open_issues/performance/io_system/test-lseek.c new file mode 100644 index 00000000..691e9d07 --- /dev/null +++ b/open_issues/performance/io_system/test-lseek.c @@ -0,0 +1,16 @@ +#include <stdio.h> +#include <math.h> +#include <fcntl.h> +#include <unistd.h> +#include <sys/time.h> +int main(void) { + int fd = open("test.c", O_RDONLY); + struct timeval tv1, tv2; + int i; + gettimeofday(&tv1, NULL); + for (i = 0; i < 100000; i++) + lseek(fd, 0, SEEK_CUR); + gettimeofday(&tv2, NULL); + printf("%07lu\n", (tv2.tv_sec-tv1.tv_sec) * 1000000 + tv2.tv_usec - tv1.tv_usec); + return 0; +} |