[lug] Per process I/O statistics

[Steve Sullivan]

Is there any way to see per-process I/O statistics?
For example, top shows %CPU.  Why not reads/second and
writes/second?

There are buffering issues, but one could get a good
approximation by counting the pread and pwrite system calls.
Are these counts available anywhere?

For that matter, is it possible to count ALL types of
system calls for a process?

I know vmstat and iostat show I/O statistics on a system wide
basis, but I need to know the impact of individual processes.

Thanks!

Steve


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Steve Sullivan    sullivan at mathcom.com

http://www.mathcom.com
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