Power optimisation in imx8mp

karthicknarayanan — Wed, 29 May 2024 06:01:48 GMT

I am trying to do power optimisation in imx8mp processor, its application is to capture data from camera sensor and displaying it. I tried it with changing CPU frequency governors by following

observed different results in power like

3.8W in default frequency governor (Frequency 1.6 Ghz) with no compromise on performance
3.45W to 3.65W with other frequencies ranging from (100Mhz - 1.2Ghz) but experiencing frame drops while capturing data.
I need optimal power consumption around 3W.

I am looking for possibilities in by adjusting ddr frequency and disabling any one of the 4 CPUs,but still cannot find proper method of doing it.

And my question is

Will reducing CPU frequency or DDR frequency or disabling CPU core results in similar observation which I have mentioned above with compromise on performance ?

And using VPU instead of using CPU to capture frames will result in better performance and power consumption ?

Re: Power optimisation in imx8mp

Zhiming_Liu — Thu, 30 May 2024 02:24:26 GMT

Hi @karthicknarayanan

Please refer the AN13054 i.MX 8M Plus Power Consumption Measurement.

Will reducing CPU frequency or DDR frequency or disabling CPU core results in similar observation which I have mentioned above with compromise on performance ?

-->Of course,

And using VPU instead of using CPU to capture frames will result in better performance and power consumption ?

-->VPU is used for decode or encode, not read frame.

i.MX Processors中的主题 Power optimisation in imx8mp

Power optimisation in imx8mp

Re: Power optimisation in imx8mp