View GPU processor activity in real time?

View GPU processor activity in real time?

I wanted to know if there is such a terminal command or application that
allows one to view the progress of the processes running on the GPU in
real time. Basically, something like 'top' for the GPU.
I am running Ubuntu 13.04 on a Toshiba Satellite with an Intel 4000
graphic card and I look forward to parallelize some computations with
pyOpenCL. So I want to be able to monitor the processes of a GPU at real
time. Is this GPU-brand-dependent? Do only GPU vendors provide such a
utility or is there a general command one can easily execute?
Thanks!