Per Process disk read/write statistics in Mac OS X

Question

How do I get programatically per process disk i/o statistics in Mac OS X. In \'Activity Monitor\' application or in \'top\' command we can only get whole system disk i/o statist

Answer 1

I found iStat Menus, which sits in the menu bar. Only shows the top 5 disk read/write users (and I'm not sure if it's the sum, but it doesn't sort).