[CNCF LFX Proposal] HAMi: Reduce HAMi-core Initialization Lock Contention

### CNCF Project

HAMi

### Term

2026 Term 3 (Sep-Nov)

### Program Name

Reduce HAMi-core Initialization Lock Contention

### Program Description

## Description

Improve HAMi-core startup performance when hundreds of processes initialize CUDA concurrently and compete for the shared unified lock. The work should follow the maintainer discussion in the upstream issue and preserve correctness while reducing initialization latency and contention.

## Expected outcomes

- A reproducible benchmark for concurrent HAMi-core initialization.
- A maintainer-approved locking design based on the approaches accepted in the upstream discussion.
- An implementation with concurrency and regression tests.
- Before-and-after measurements of startup latency, throughput, and relevant resource usage.
- Documentation of the design, compatibility considerations, and operational impact.
- The implementation submitted for HAMi maintainer review.

### Technologies

C/C++, Linux, CUDA, NVML, HAMi-core

### Skills same as Technologies?

- [ ] Yes, the required skills are the same as the technologies listed above.

### Required/Desirable Skills

Linux concurrency, performance profiling, benchmarking, synchronization design, testing

### Mentors

Mengxuan Li | @archlitchi | mengxuan.li@dynamia.ai | limengxuan
Shouren Yang | @shouren | yangshouren@gmail.com | shouren

### Upstream Issue URL

https://github.com/Project-HAMi/HAMi/issues/1662

### Application Prerequisites

- [x] Resume
- [x] Cover Letter
- [ ] School Enrollment Verification
- [ ] Participation Permission from school or employer
- [ ] Coding Challenge
- [ ] Custom Prerequisite (fill in details below)

### Coding Challenge URL

_No response_

### Custom Prerequisite Name

_No response_

### Custom Prerequisite Description

_No response_

### Custom Prerequisite — File Upload

- [ ] Yes — completion of this task requires the mentee to submit a file.

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**LFX program:** [CNCF - HAMi: Reduce HAMi-core Initialization Lock Contention (2026 Term 3)](https://mentorship.lfx.linuxfoundation.org/project/ce2ebae3-6936-409d-a9d7-c98b109ec814)

Start by reading the upstream issue at https://github.com/Project-HAMi/HAMi/issues/1662 and the maintainer discussion it references. Then identify the HAMi-core initialization path and establish the reproducible concurrent benchmark described here; done means a maintainer-approved locking design, implementation, concurrency and regression tests, before-and-after measurements, and documented compatibility and operational impact.

Written by the indexing model from the issue text.