Tracking CPU and Memory usage per process

Question

I suspect that one of my applications eats more CPU cycles than I want it to. The problem is - it happens in bursts, and just looking at the task manager doesn\'t help me as

Answer 1

I use taskinfo for history graph of CPU/RAM/IO speed. http://www.iarsn.com/taskinfo.html

But bursts of unresponsiveness, sounds more like interrupt time due to a falty HD/SS drive.