NVIDIA / NVIDIA/raft

[FEA] Interface support to reserve an address space without actually allocating it

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Cuda
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Description

Describe the solution you'd like
@seunghwak has a very good point here about having a support for reserving memory (aka over-subscription) using CUDA's virtual memory management APIs. I believe this is a good improvement to our existing Allocator, device_buffer and host_buffer interfaces. Thus, filing this issue so that this feature item is not lost.

Additional context
Ref: https://devblogs.nvidia.com/introducing-low-level-gpu-virtual-memory-management/

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading the existing Allocator, device_buffer, and host_buffer interfaces, then review the linked discussion and NVIDIA's CUDA virtual memory management reference. Define the interface scope for reserving an address space without allocation and verify that the resulting feature works across the named interfaces.

Written by the indexing model from the issue text.

Assessment

Domain
performance
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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