GPU[gk20a] Power Management in Jetson tk1

Autonomous Machines Jetson & Embedded Systems Jetson TK1
1

Hi,

Seen that GPU[gk20a] is under run time power management. Code is located: drivers/gpu/nvgpu/gk20a/gk20a.c

Could you please let me know about
what cases / events GPU[gk20a] will be powered on in Jetson tk1,
what is the condition & status GPU[gk20a] will be powered down in Jetson tk1.

Using the following command to know status of GPU[gk20a] power on / off status:
cat /sys/kernel/debug/powergate

Thank you very much

2

Do you have HDMI attached? You might find these wiki pages useful:

[url]Jetson/Jetson TK1 Power - eLinux.org
[url]Jetson/Performance - eLinux.org

3

Hi,

Thanks for information, which I have already gone through it.

My request in the question is

Could you please let me know about

what cases / events GPU[gk20a] will be powered on in Jetson tk1,
what is the condition & status GPU[gk20a] will be powered down in Jetson tk1.

4

You could refer to TRM description about GPU PLL and GPU power gating. In general, the software you develop should not worry about power on/off GPU. What you would concern is generally system power of the device under certain use case.