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In a multi-GPU setting, right now it's not possible to memcpy directly between the two devices. A couple of checks would have to be done by cuda.core as part of enabling this:
This issue is actually very tricky because the modern way of exposing peer access support is again tied to the mempool/VMM APIs, such as cuMemPoolSetAccess/cuMemSetAccess, same as IPC (#103). We'll need a coherent, unified, and consistent solution here.
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leofang commentedon Mar 5, 2025
This issue is actually very tricky because the modern way of exposing peer access support is again tied to the mempool/VMM APIs, such as
cuMemPoolSetAccess/cuMemSetAccess, same as IPC (#103). We'll need a coherent, unified, and consistent solution here.MemoryResourcecore and concrete MR implementations public #104