Linux total disk I/O from already running process
Question
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
1 answers
solution1
1 ACCPTED 2015-10-01 11:58:04
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
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