ARM Mali-400 cores management

Hello.

We are programming on Mali-400 under Allwinner A20 about a month.

We have a some questions about GPU cores.

1) Is there an any way to make sure that all cores work when we calling gldraw() ?

2) Can we somehow control pixel processors work? Enable or disable each of  them when we want.

3) We can set frequency rate for the CPU. Can we set frequency rate for the GPU?

We used "MALI_IOC_PP_NUMBER_OF_CORES_GET" ioctl, and have gotten the correct number of the GPU cores - 2.

There is a "MALI_IOC_PP_START_JOB" ioctl, which we don't know how to use, is this ioctl need to enable or disable pixel processors?

Thanks and Regards.

Hakob.