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Why use GPU_MEM = "128"


#1

If using the mesa driver. using GPU_MEM = “128” is useless. afaik it’s only for the closed source driver and if used with mesa, it just reserves 128M from ram for no reason.


#2

We uses mesa and enable vc4 (DRM) in kernel . Also webOS OSE uses omx libraries for multimedia HW acceleration. So we need GPU_MEM to 128MB.

FYI
https://wiki.gentoo.org/wiki/Raspberry_Pi_VC4


#3

By testing further, using video tag it shows the usage of CPU (w/ top) of 170% to 200%.

Isn’t that a bit to much processing power for just one video?

whilst using omxplayer cpu goes to around 28% - 39%.

I am not very savvy with this but performance does interest me.

reason I am saying this is because I would like to ask if gpu_mem isn’t to low for 128MB?


#4

FYI
Regarding video tag in webos OSE, please refer https://github.com/webosose/build-webos/issues/5


#5

oh awesome ty. this will be good to keep an eye out :smiley: