I’m working on a performance tool and I’m interested in the total disk I/O i single process have done since it started. I have the porcess PID and i can easily get the current I/O rate with tools like iotop or sar, but not the total I/O.
Is this even logged in Linux and is there a way to get it?
/Mpresmann
Advertisement
Answer
You can read the /proc/<PID>/io file for specific process
$ sudo cat /proc/1/io rchar: 144440702940 wchar: 4615239440674 syscr: 156954128 syscw: 173077623 read_bytes: 113700176646 write_bytes: 100325525146 cancelled_write_bytes: 2596581376