oneapi-src/unified-runtime
Feb 2026 – Feb 2026
1 Month active
Languages Used
C++
Technical Skills
CUDAConcurrencyEvent HandlingHIP
Christoph Neuhauser
PROFILE
Christoph Neuhauser
Worked on the oneapi-src/unified-runtime repository to enhance the reliability of image copy operations across CUDA and HIP adapters. Focused on addressing a race condition in event recording, the developer ensured that start() was always invoked and that the return value from record() was properly handled. This targeted fix reduced flakiness in Vulkan interop workflows and improved consistency for downstream workloads dependent on unified runtime image operations. Using C++ and leveraging expertise in concurrency, event handling, and GPU programming with CUDA and HIP, the work contributed to more deterministic behavior and a lower failure rate for image copy operations in production environments.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
1Total
Bugs
1
Commits
1
Features
0
Lines of code
78
Activity Months1
Your Network
106 peopleWork History
February 2026
1 Commits
Feb 1, 2026February 2026 monthly performance summary for oneapi-src/unified-runtime. Focused on reliability and stability of image copy operations across CUDA/HIP adapters. Implemented a targeted race-condition fix in event recording by ensuring start() is invoked and the return value from record() is properly handled. The change reduces flakiness in image copy paths, improving consistency for Vulkan interop workflows and downstream workloads relying on the unified runtime image operations. The change was landed in commit 5fc67c55f6f9bdb10e901537f4e7b4d62821ee00, addressing functions urBindlessImagesImageCopyExp, urBindlessImagesWaitExternalSemaphoreExp, and urBindlessImagesSignalExternalSemaphoreExp. Tests and real-world usage previously observed race conditions in ~3 out of 100 runs; with this fix, stability is significantly improved. The work supports performance and reliability goals for developers and end users relying on stable unified runtime behavior.
1 Commits
Feb 1, 2026February 2026 monthly performance summary for oneapi-src/unified-runtime. Focused on reliability and stability of image copy operations across CUDA/HIP adapters. Implemented a targeted race-condition fix in event recording by ensuring start() is invoked and the return value from record() is properly handled. The change reduces flakiness in image copy paths, improving consistency for Vulkan interop workflows and downstream workloads relying on the unified runtime image operations. The change was landed in commit 5fc67c55f6f9bdb10e901537f4e7b4d62821ee00, addressing functions urBindlessImagesImageCopyExp, urBindlessImagesWaitExternalSemaphoreExp, and urBindlessImagesSignalExternalSemaphoreExp. Tests and real-world usage previously observed race conditions in ~3 out of 100 runs; with this fix, stability is significantly improved. The work supports performance and reliability goals for developers and end users relying on stable unified runtime behavior.
February 2026
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Quality Metrics
Correctness100.0%
Maintainability80.0%
Architecture80.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++
Technical Skills
CUDAConcurrencyEvent HandlingHIP
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