Just as this thread: How to measure CPU load when watching TV? - I too was looking for a way to monitor CPU usage when watching TV as I'm experiencing stutter from time to time. And since the TV is my only connected screen, and it only happens in Fullscreen mode, switching back and forth between windowed and FS was not helping. Having no luck finding a small app that would display CPU usage, and always be on top, I stumbled over RTM aka. Remote Task Manager. Only downfall is you need an extra PC, but I assume that's not a problem for people in here 
You simply install the Program on a PC that's not running MP, and then push the rtmservice.exe onto the HTPC, this allows you to monitor all running processes on the HTPC just as you can do with the local Task Manager.
So I can now inform you all that watching a DVD, when the CPU is clocked at 981Mhz, requires 14-15% of all available CPU power.
Recording one TV show while watching DVD pushes MP to 16-17%. Still clocked at 981Mhz... Impressive indeed..
Anyway - There's a 30 day free trial to be downloaded from http://www.protect-me.com/rtm/
Cheers,
Steffen
You simply install the Program on a PC that's not running MP, and then push the rtmservice.exe onto the HTPC, this allows you to monitor all running processes on the HTPC just as you can do with the local Task Manager.
So I can now inform you all that watching a DVD, when the CPU is clocked at 981Mhz, requires 14-15% of all available CPU power.
Recording one TV show while watching DVD pushes MP to 16-17%. Still clocked at 981Mhz... Impressive indeed..
Anyway - There's a 30 day free trial to be downloaded from http://www.protect-me.com/rtm/
Cheers,
Steffen