13 #include "common/Clock.h"
14 #include "common/safe_io.h"
19 int main(int argc, char **argv)
22 int fd, count, loop = 0;
25 fprintf(stderr, "Usage: %s device bsize count\n", argv[0]);
29 int bsize = atoi(argv[2]);
30 count = atoi(argv[3]);
32 posix_memalign(&buf, sysconf(_SC_PAGESIZE), bsize);
34 //if ((fd = open(argv[1], O_SYNC|O_RDWR)) < 0) {
35 if ((fd = open(argv[1], O_DIRECT|O_RDWR)) < 0) {
37 fprintf(stderr, "Can't open device %s\n", argv[1]);
42 utime_t start = ceph_clock_now();
43 while (loop++ < count) {
44 int ret = safe_write(fd, buf, bsize);
47 //if ((loop % 100) == 0)
48 //fprintf(stderr, ".");
52 utime_t end = ceph_clock_now();
57 gethostname(hostname, 80);
59 double mb = bsize*count/1024/1024;
61 cout << hostname << "\t" << mb << " MB\t" << end << " seconds\t" << (mb / (double)end) << " MB/sec" << std::endl;