On Thu, 2009-10-29 at 19:54 -0500, psychok9 wrote: > I've uploaded very long output of pidstat of wow.exe here: > http://depositfiles.com/files/s7mbjs154 (http://depositfiles.com/files/s7mbjs154) > > I can't understand it [Question] > That shows that all four CPUs are being used and that threads are switching about between CPUs between snapshots, which is what you would expect. How the read pidstat output: - each chunk of text, starting with a heading line is a snapshot of the system made at the time shown in the first column. There's a snapshot recorded every two seconds. - TGID is the process id of the process. - TID is the thread id for each thread. - The Command column shows the relationship between threads - in this case that all the threads were spawned in parallel. - the interesting columns for you are %CPU and CPU which together show how much CPU a thread is using and which CPU its running on. Martin