Comments (8)
Thank you for reporting this issue and for the detailed description. I think you are right, it is a major issue. We will analyze it and go back to it when we find some proposed solution.
from vulkanmemoryallocator.
I've made a clarification in the documentation stating that only buffers can be defragmented, not images.
I also made a fix that limits GPU defragmentation only to those memory types that support creating a buffer used to do GPU transfers.
Do you think that defragmentation with these limitations is now compliant to Vulkan specification?
from vulkanmemoryallocator.
Yes, that should be compliant. The pre-edited comment where you mentioned linear images would be as well, since linear images are allowed to alias with buffers.
from vulkanmemoryallocator.
Hey @jeffbolznv, I suggested @adam-sawicki-amd remove the linear image part, as linear images still have an expected image "header" with undefined contents - buffers only have defined aliasing over the texel data, which occurs after an implementation defined offset. So that falls under the same conditions as the rest of a regular images AFAICT.
BTW I definitely think we need some spec clarifications here...
from vulkanmemoryallocator.
OK, fine with me.
I think the spec is fairly clear about what can alias with what in the resources-memory-aliasing section.
from vulkanmemoryallocator.
Ah I forgot about that language - you're right that's fairly clear.
from vulkanmemoryallocator.
Thank you for your help with sorting out this issue.
from vulkanmemoryallocator.
Please note a new defragmentation is being developed as #90 !
from vulkanmemoryallocator.
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