6 #include "include/utime.h"
7 #include "common/Clock.h"
8 #include "common/errno.h"
12 int main(int argc, const char **argv)
14 const char *fn = argv[1];
15 multimap<utime_t, utime_t> latency;
18 int fd = ::open(fn, O_CREAT|O_RDWR, 0644);
21 cerr << "failed to open " << fn << " with " << cpp_strerror(err) << std::endl;
26 utime_t now = ceph_clock_now();
27 int r = ::pwrite(fd, fn, strlen(fn), 0);
29 utime_t lat = ceph_clock_now();
33 oldmin = latency.begin()->first;
34 latency.insert(make_pair(lat, now));
35 utime_t newmin = latency.begin()->first;
36 while (latency.size() > max)
37 latency.erase(latency.begin());
38 if (oldmin == newmin) {
39 cout << "latency\tat" << std::endl;
40 for (multimap<utime_t,utime_t>::reverse_iterator p = latency.rbegin();
43 cout << p->first << "\t" << p->second << std::endl;