Edit File: ioblktime.stp
#!/usr/bin/stap global req_time%[25000], etimes probe ioblock.request { req_time[$bio] = gettimeofday_us() } probe ioblock.end { t = gettimeofday_us() s = req_time[$bio] delete req_time[$bio] if (s) { etimes[devname, bio_rw_str(rw)] <<< t - s } } /* for time being delete things that get merged with others */ probe kernel.{trace("block_bio_frontmerge"), trace("block_bio_backmerge")} { delete req_time[$bio] } probe timer.s(10), end { ansi_clear_screen() printf("%10s %3s %10s %10s %10s\n", "device", "rw", "total (us)", "count", "avg (us)") foreach ([dev,rw] in etimes - limit 20) { printf("%10s %3s %10d %10d %10d\n", dev, rw, @sum(etimes[dev,rw]), @count(etimes[dev,rw]), @avg(etimes[dev,rw])) } delete etimes }