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rada
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PostPosted: Thu Mar 29, 2007 7:15 pm    Post subject: GPU Memory Usage Monitor? Reply with quote

Hi, I'm wondering if there are any tools which can monitor GPU memory usage. I have seen this in a few apps and games but never in a system monitor tool.
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tw04l124
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PostPosted: Sun Apr 01, 2007 10:28 am    Post subject: Reply with quote

Nice Idea, did you find anything?
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bLUEbYTE84
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PostPosted: Sun Apr 01, 2007 3:34 pm    Post subject: Reply with quote

I don't think this is possible except inside the actual 3d application internally. The reason is that the allocation of video ram is done in a way that is not similar to the, say, system RAM.
The video RAM is allocated for two purposes:
1-Frame-buffer: Constant, computable ( widthxheightxbpp/8 bytes)
2-Texture storage: As I said, no generic way to monitor this. Only possibility is the implementing it inside the application I think.

You can map to video memory just like the real RAM and read it(via kernel fusion device interface), for instance you might see something like:
132475234238052304587634852365235000000000000
in which case you would say "X percent of the memory is not yet allocated(all zeros)". But this has two problems:
AFAIK the video memory is all-zero only on fresh powerons. Plus, I don't think the unused(de-alloced) sections are cleared.

Another possibility might be implementing it in driver or OpenGL-library level. In the first case I suspect this would require hardware assistance. But I'm not sure about that.
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