RAMANJINEYULU THOTA

Image flickering after running the application

Discussion created by RAMANJINEYULU THOTA on Jun 28, 2017

Hi,

 

I am currently working on image flickering problem. I am using "galcore" kernel module and running the application of triangle shape. When i have run the application the image starts flickering. Below warnings are getting when inserted GPU module.

 

insmod galcore.ko
[ 32.027606] Warning: No contiguous memory is reserverd for gpu.!
[ 32.027606]
[ 32.034871] Warning: Will use default value(134217728) for the reserved memory!
[ 32.034871]
[ 32.043732] Galcore version 5.0.11.41671
[ 32.059745] galcore 40020000.gpu: swiotlb buffer is full (sz: 134217728 bytes)
[ 32.067126] galcore 40020000.gpu: swiotlb buffer is full (sz: 130023424 bytes)
[ 32.074475] galcore 40020000.gpu: swiotlb buffer is full (sz: 125829120 bytes)
[ 32.081832] galcore 40020000.gpu: swiotlb buffer is full (sz: 121634816 bytes)
[ 32.089142] galcore 40020000.gpu: swiotlb buffer is full (sz: 117440512 bytes)
[ 32.096479] galcore 40020000.gpu: swiotlb buffer is full (sz: 113246208 bytes)
[ 32.103836] galcore 40020000.gpu: swiotlb buffer is full (sz: 109051904 bytes)
[ 32.111172] galcore 40020000.gpu: swiotlb buffer is full (sz: 104857600 bytes)
[ 32.118480] galcore 40020000.gpu: swiotlb buffer is full (sz: 100663296 bytes)
[ 32.125834] galcore 40020000.gpu: swiotlb buffer is full (sz: 96468992 bytes)

 

I could not understand the problem in GPU driver and video driver.

 

In application we can use sleep() function to avoid the flickering issue, but if we want to run multiple applications we could not use the sleep() function.

Issue: I suspect the issue, when GPU usage is increase then video driver starts to flickering but in GPU driver where exactly i have to find the GPU usage is increasing.

 

Could you please help on this, where to change to decrease the GPU usage(which file).

 

Thanks & Regards,

Ramanjineyulu.

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