Add token pool for cuCreate API

[Binyang2014]

Create a tokenPool to allocate token. This feature is used to support inter node NVL and try to reduce the footprint caused by cuCreate

[Copilot]

Pull Request Overview

This pull request implements a token pool for cuCreate API to support inter-node NVL operations and reduce the footprint of cuCreate calls. The TokenPool manages allocation and deallocation of GPU memory tokens using a bitmap-based allocation strategy.

Key Changes

• Introduces a new TokenPool class for efficient token allocation and management
• Integrates the token pool into the Context class for centralized token management
• Updates semaphore creation to use tokens from the pool instead of individual allocations

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/utils_internal.cc	Implements the core TokenPool class with bitmap-based allocation
src/semaphore.cc	Updates semaphore stub to use context's token pool for GPU token allocation
src/include/utils_internal.hpp	Adds TokenPool class declaration
src/include/context.hpp	Adds token pool member and getter method to Context::Impl
src/gpu_utils.cc	Implements getCuAllocationGranularity helper function
src/context.cc	Implements lazy initialization of token pool in Context
include/mscclpp/gpu_utils.hpp	Adds declaration for getCuAllocationGranularity function
include/mscclpp/gpu.hpp	Adds HIP compatibility definitions for allocation granularity
include/mscclpp/core.hpp	Adds friend class declaration for SemaphoreStub access

Comments suppressed due to low confidence (3)

src/utils_internal.cc:1

• This file is missing the required MIT License header at the top. All source files should include the license header.

// Copyright (c) Microsoft Corporation.

src/include/utils_internal.hpp:1

• This file is missing the required MIT License header at the top. All source files should include the license header.

// Copyright (c) 2016-2022, NVIDIA CORPORATION. All rights reserved.

src/include/context.hpp:1

• This file is missing the required MIT License header at the top. All source files should include the license header.

// Copyright (c) Microsoft Corporation.

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