title: Find out how much time a process is blocked waiting for I/O on Linux
body: <p>Is there a <a href="http://en.wikipedia.org/wiki/Vmstat" rel="noreferrer">vmstat</a> type command that works per-process that allows you to see how much time a process is blocked waiting for <a href="http://en.wikipedia.org/wiki/Input/output" rel="noreferrer">I/O</a>, time in kernel and user code?</p>