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

Activity Monitor shows per process I/O statistics in the "disk" tab (perhaps its new since this question was asked). See "Bytes Written" and "Bytes Read" columns.