Can I set the DDR clock manually?

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

Hi, I want to use Jetson TX2 as a low power consumption mode by lowering the DDR clock frequency. Can I set DDR clock manually?
I know that using nvpmodel helps to reduce power consumption. But I would like to know other way if there is.

thank you for your help.

2

Not sure about changing the DDR itself, but you can set the Memory Controller (EMC) max frequency through sysfs. See the jetson_clocks.sh script from the home dir on the Jetson for an example of setting the governor for it, the CPU, and the GPU. This is the sysfs entry for the EMC:

/sys/kernel/debug/clock/override.emc/rate

Note that there are many other settings exposed to tweak if you look around (use ‘su’ as opposed to ‘sudo’ to access the protected directory).

3

Sorry for not getting back sooner but thank you for your answer.

I was able to find the setting.