Windows IoT Core and gpu_mem in config.txt

Dick M 1

Hi,

Was curious if increasing the gpu_mem in config.txt has any effect on Windows IoT Core and my UWP app?!

Dick

3 answers

Cris Zhan-MSFT 6,601 Reputation points

2021-06-28T09:57:24.343+00:00

Hi,

The gpu_mem option in config.txt specifies how much memory, in megabytes, to reserve for the exclusive use of the GPU: the remaining memory is allocated to the ARM CPU for use by the OS.
https://www.raspberrypi.org/documentation/configuration/config-txt/memory.md

You can take a test and observe for a period of time.
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Dick M 1 Reputation point

2021-06-30T15:31:20.43+00:00

Hi @Cris Zhan-MSFT ,

Did test and observe it already for a period of time but wanted to know from a technical perspective if it would make any sense to increase the gpu_mem. Is it being used by Windows IoT Core or am I just reserving memory which is never used?

Best, Dick
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Cris Zhan-MSFT 6,601 Reputation points

2021-07-02T08:01:52.417+00:00

Hi,
There have been many discussions in the community that windows iot core cannot get performance acceleration on Raspberry Pi.

Unfortunately the GPU hardware in RPi is not Direct X capable so Windows is unable to leverage it.

https://social.msdn.microsoft.com/Forums/en-US/6b523e60-0a89-4860-9014-a07d8936c2d9/raspberry-pi-2-b-graphic-performance-issue?forum=WindowsIoT

Including the latest Release Notes(Build 17763.253) also mentioned some problems on the Raspberry Pi.

Video playback performance on the Raspberry Pi platform is not optimized. Animated user elements including XAML-based dropdown menus may exhibit less than optimal performance.

Dick M 1 Reputation point

2021-07-02T08:41:29.517+00:00

Hi @Cris Zhan-MSFT ,

Thanks for the response. I know Windows IoT Core does not use the GPU for hardware acceleration. Our interface does not use heavy animations or video but shows some controls and mainly images.

Is gpu_mem used for displaying images on the screen and does it technically make sense to increase the gpu_mem in case of showing more images on the screen?

Best, Dick
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Dick M 1 Reputation point

2021-07-06T16:39:55.91+00:00

Hi @Cris Zhan-MSFT ,

Do you have any update on my latest question above?

KR, Dick
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Cris Zhan-MSFT 6,601 Reputation points

2021-07-07T06:23:54.257+00:00

Hi DickM-5017,

Sorry I don’t know the answer to that question.

Dick M 1 Reputation point

2021-07-08T05:55:14.387+00:00

Hi @Cris Zhan-MSFT ,

Can happen, do you know someone who does?

Dick

Cris Zhan-MSFT 6,601 Reputation points

2021-07-09T02:27:15.873+00:00

Hi,
Unfortunately I can’t find and provide any information. I have no idea except to increase or decrease the option gpu_mem to observe the running status of the application.
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