On Wed, Jun 22, 2022 at 01:01:54PM +0530, R.manikandan Rathinam wrote: > Hi Marius, Hi Manikandan, > I attempted image-processing using the OpenCV, OpenGL & OpenCL API on the > AGL side, however, it uses up CPU memory and slows down the other > operations. How can it be handled in GPU memory? Are there any libraries or > services that can help? > If you have any OpenCL or OpenGL-related references, please share them; It > will help me go further. I have limited experience exposure to OpenCL/OpenCV but AFAIK with embedded platforms (such as aarch64/arm) memory is shared between the system itself. As in, there's no dedicated VRAM which the GPU can use, similar to what happens on desktops, with x86 platforms. And indeed, at start-up, there's a zone mapped for the GPU to use, but it's not dedicated, such as VRAM. Suppose this has the side-effect of bottlenecking access to it, presumably with some sort of a controller that mitigates access to it, maybe having some internal QoS to favour some tasks over the other. Direct scan-out of framebuffer, avoid importing into GPU could also help with memory bandwidth. Tweaking the DRAM controller, like increasing clock speed might be some other alternative, at the expense of additional heating/power consumption. Some of these can only happen on particular platforms, if hardware supports it. Unfortunately I don't have more to recommend. I've CC the AGL dev mailing list, maybe others have encountered this situation and have some alternatives useful to mention. > > Thanks & Regards, > *Manikandan R* -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#9904): https://lists.automotivelinux.org/g/agl-dev-community/message/9904 Mute This Topic: https://lists.automotivelinux.org/mt/91918357/2167316 Group Owner: agl-dev-community+owner@xxxxxxxxxxxxxxxxxxxxxxxxx Unsubscribe: https://lists.automotivelinux.org/g/agl-dev-community/leave/4543822/2167316/883735764/xyzzy [list-automotive-discussions82@xxxxxxxxxxx] -=-=-=-=-=-=-=-=-=-=-=-
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