I'm running a CPU intensive command on Mavericks (Opencv_traincasscade). Under Mountain Lion the process used to use all 8 cores all the way though. However after upgrading it drops to 1 core after a short time.
Could this be app nap? Is there anything I can do to fix this?
Best Answer
Being able to use multiple-cores or threads is dependent on the process. This is not AppNap or OS X causing the change.
Your process,
opencv_traincascade
, may be resource constrained after a few moments and thus reduced to queuing up tasks as it waits for disk access or another limited resource.In this case you may need to switch to a different build of OpenCV:
Installing OpenCV with TBB via
brew
: