
Over four months, Yu contributed to DUNE-DAQ’s fdreadoutlibs and appmodel repositories by building and refining observability and state management features for data acquisition pipelines. He developed configurable, thread-safe metric collection and centralized state harvesting, enabling reliable monitoring and performance analysis across processing components. Using C++ and Python, Yu implemented multi-threaded data collection, lifecycle-safe metric publication, and configuration-driven enablement, improving both reliability and maintainability. His work included refactoring for code clarity, expanding test coverage, and integrating new processors for AVX-based data handling. These efforts addressed concurrency, data modeling, and system testing, resulting in deeper, more actionable insights for DAQ operations.

October 2025: Delivered core reliability and observability improvements across DUNE-DAQ components, with a strong focus on thread-safe data collection, metric visibility, and test coverage. Highlights include multi-threaded harvesting in TPGInternalStateHarvester, restored metric collection via WIBEthFrameProcessor, expanded metric configuration in appmodel, repository hygiene to align with development, and enhanced DAQ system tests with AVX processing and state-collection validation. These changes deliver tangible business value through more reliable readout pipelines, faster issue diagnosis, and improved performance signals for operators and developers.
October 2025: Delivered core reliability and observability improvements across DUNE-DAQ components, with a strong focus on thread-safe data collection, metric visibility, and test coverage. Highlights include multi-threaded harvesting in TPGInternalStateHarvester, restored metric collection via WIBEthFrameProcessor, expanded metric configuration in appmodel, repository hygiene to align with development, and enhanced DAQ system tests with AVX processing and state-collection validation. These changes deliver tangible business value through more reliable readout pipelines, faster issue diagnosis, and improved performance signals for operators and developers.
Month: 2025-09 — Focused delivery in DUNE-DAQ/fdreadoutlibs with the introduction and integration of a centralized state management capability for TPG processors. Delivered the TPGInternalStateHarvester to harvest internal state data, map channel-plane data to pipelines, and centralize state management. Refactored WIBEthFrameProcessor to utilize the harvester and removed unused metric collection paths, improving maintainability and performance. Completed end-to-end integration including processor references, channel-plane mappings, and configuration updates to enable robust state harvesting. Impact: Improved observability, consistency of internal state across pipelines, and reduced maintenance burden through cleaner metric handling and centralized state management. Note: No major bugs reported or fixed this month beyond refactoring and integration work.
Month: 2025-09 — Focused delivery in DUNE-DAQ/fdreadoutlibs with the introduction and integration of a centralized state management capability for TPG processors. Delivered the TPGInternalStateHarvester to harvest internal state data, map channel-plane data to pipelines, and centralize state management. Refactored WIBEthFrameProcessor to utilize the harvester and removed unused metric collection paths, improving maintainability and performance. Completed end-to-end integration including processor references, channel-plane mappings, and configuration updates to enable robust state harvesting. Impact: Improved observability, consistency of internal state across pipelines, and reduced maintenance burden through cleaner metric handling and centralized state management. Note: No major bugs reported or fixed this month beyond refactoring and integration work.
August 2025 monthly summary: Delivered foundational OpMon enhancements in the fdreadoutlibs module and established metric collection infrastructure in appmodel, driving measurable improvements in monitoring reliability, configurability, and performance. The OpMon overhaul enables per-channel metrics, frame-count-aware publication, robust enablement gating, and aggregated statistics across DLH planes, supported by a single-pass metric processing pipeline that reduces overhead and improves accuracy. These changes align observability with business needs, enabling faster detection and faster corrective actions across the WIBEthFrameProcessor and DLH components.
August 2025 monthly summary: Delivered foundational OpMon enhancements in the fdreadoutlibs module and established metric collection infrastructure in appmodel, driving measurable improvements in monitoring reliability, configurability, and performance. The OpMon overhaul enables per-channel metrics, frame-count-aware publication, robust enablement gating, and aggregated statistics across DLH planes, supported by a single-pass metric processing pipeline that reduces overhead and improves accuracy. These changes align observability with business needs, enabling faster detection and faster corrective actions across the WIBEthFrameProcessor and DLH components.
July 2025 monthly summary: Delivered two key observability features across fdreadoutlibs and appmodel, enabling configurable metrics collection and processor monitoring. The changes improve reliability and business value through centralized, configurable observability, with lifecycle-safe operation and rate-controlled collection. No critical defects fixed this month; stabilization work focused on metrics subsystem. Commits traceable to the work include: in fdreadoutlibs - 5418f2bc43eaa7e71014d0d1e39c35d70f891f2e, 127735a292f6b395803e0636d4992231541cfc3b, 800d427bf6b2978484943a8b0c4ac1de02701b49; in appmodel - 53708f0d094e0611d34fa382308789bf79b2cd5d.
July 2025 monthly summary: Delivered two key observability features across fdreadoutlibs and appmodel, enabling configurable metrics collection and processor monitoring. The changes improve reliability and business value through centralized, configurable observability, with lifecycle-safe operation and rate-controlled collection. No critical defects fixed this month; stabilization work focused on metrics subsystem. Commits traceable to the work include: in fdreadoutlibs - 5418f2bc43eaa7e71014d0d1e39c35d70f891f2e, 127735a292f6b395803e0636d4992231541cfc3b, 800d427bf6b2978484943a8b0c4ac1de02701b49; in appmodel - 53708f0d094e0611d34fa382308789bf79b2cd5d.
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