Comment 255 for bug 620074

I have one question for the kernel developers...

How many processor time is normal for a dd process using dma?
 I have two hipothesis:
   1.- Kernel is taking to much time getting the process in and out even if it is blocked by IO.
   2.- Is there one lock that prevents the scheduler from running free...

How can I trackdown processor time of a program (say dd)?
   Want to see if times for each kind of process is normal. Current computers are fast and sometimes we do not realize that a process is taking to much time to complete.

Any good ways to profile the kernel looking at only one PID?
   I want to profile specific parts of the kernel. Any good doc?

Thank you all!

I forgot to say. For now don't use the testsuite anymore until new tests are here.