<karolherbst>
also.. on some GPUs it's just pointless overhead (e.g. on unified memory architextures)
<karolherbst>
but if that allows you to turn a blocking operation into a non-blocking one, there might be merit in doing that on demand (as some mesa drivers are doing internally)
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<sima>
jfalempe, you mentioned you're working on a v7 in reply to jani, but I'm not seeing that?
<sima>
or did I look at the wrong series
<jfalempe>
sima: I said if I do a v7 for other reasons, I will change the variable name.
<jfalempe>
but I can do a v7 with only this rename, if you think it's better.
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<sima>
jfalempe, well more meaning should I review v6 or wait for v7?
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<jfalempe>
you can review v6, I've no v7 in preparation.
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<tzimmermann>
jfalempe, thanks for the review
<jfalempe>
tzimmermann: you're welcome :)
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<zamundaaa[m]>
when I do multi gpu copies of buffers, is there any way to optimize it with damage tracking?
<zamundaaa[m]>
I have a severely bandwidth restricted system here (eGPU), where copying the whole buffer from iGPU to eGPU gets me a max. of about 85 fps
<zamundaaa[m]>
Very often, only small parts of the screen change though, so I implemented damage tracking with OpenGL and I get... 85 fps
<zamundaaa[m]>
I basically just set glScissors for the changed rect(s), so only a 200x200 or so pixel area actually gets repainted in my test
<zamundaaa[m]>
Am I doing something wrong, or is this just not expected to be any better?
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<emersion>
zamundaaa[m]: i wonder if the full buffer is still getting copied over...
<emersion>
the driver doesn't even know which part is going to be sampled in advance
<emersion>
if it knew, not sure there is logic to optimize this case...
<emersion>
in the kernel
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<zamundaaa[m]>
You mean it copies the whole buffer from the iGPU to the dGPU, for me to then copy it again? Sounds... inefficient
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<emersion>
maybe MrCooper knows best what's up
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