MTL.append_copy! silently ignores Metal documentation restriction

[christiangnrd]

It is stated here that the buffer offsets and buffer size need to be multiples of 4 in MacOS.

MTL.append_copy! which calls copyFromBuffer does not impose such a limitation, but it also seems to work for offsets and sizes that are not multiples of 4. I suspect this limitation onlyexists for non-apple-silicon GPUs, which we don't support, but I don't know how to verify that.

How should we handle this?

[maleadt]

Maybe ask the question on https://developer.apple.com/forums/? There's some devs and employees active there.

[christiangnrd]

I get redirected to a "Page not found" whenever I try to sign in or post. I'll try again in a few days.

[christiangnrd]

Ended up posting but never got a reply. I suggest we leave things as-is unless we find a reason not to.