OpenXiangShan/Utility
Oct 2025 – Oct 2025
1 Month active
Languages Used
C++Scala
Technical Skills
ChiselDigital DesignHardware DesignHardware TracingLow-Level ProgrammingMicroarchitecture
Yangyu Chen
PROFILE
Yangyu Chen
Over five months, Cyy contributed to projects spanning compiler development, hardware tracing, and technical documentation. In the zephyrproject-rtos/gcc repository, Cyy resolved AArch64 CPU feature symbol lookup issues under Link Time Optimization, improving build reliability through careful linker optimization in C++. For OpenXiangShan/Utility, Cyy enhanced ChiselTaggedTrace to enable micro-op tracing and speculative execution lifetime tracking, refactoring code in Scala for maintainability and deeper performance analysis. Additional work in rust-lang/gcc focused on refining i386 PTA bitmask configurations, while documentation improvements in OI-wiki/OI-wiki and OpenXiangShan/XiangShan-doc strengthened project clarity and onboarding. The work demonstrated technical depth and attention to maintainability.
Overall Statistics
Feature vs Bugs
60%Features
Repository Contributions
6Total
Bugs
2
Commits
6
Features
3
Lines of code
221
Activity Months5
Your Network
412 people
Work History
October 2025
2 Commits • 1 Features
Oct 1, 2025Month 2025-10 – OpenXiangShan/Utility: Key feature delivery and code quality improvements. Implemented ChiselTaggedTrace enhancements enabling micro-op tracing and speculative execution lifetime tracking; introduced InstSeqNum Bundle to consolidate instruction sequence number and uop index, with refactors to updateInstPos and updateInstMeta for maintainability. The changes support deeper performance analysis and correlation with PerfCCT. Commits included: c245b19f579ffbfe2ed9b658e993b5e2a397250a (feat: Support uop and speculative execution trace) and a6ca9ce4de61b6141912280516371936d54c47d0 (feat: Use InstSeqNum Bundle for PerfCCT).
2 Commits • 1 Features
Oct 1, 2025Month 2025-10 – OpenXiangShan/Utility: Key feature delivery and code quality improvements. Implemented ChiselTaggedTrace enhancements enabling micro-op tracing and speculative execution lifetime tracking; introduced InstSeqNum Bundle to consolidate instruction sequence number and uop index, with refactors to updateInstPos and updateInstMeta for maintainability. The changes support deeper performance analysis and correlation with PerfCCT. Commits included: c245b19f579ffbfe2ed9b658e993b5e2a397250a (feat: Support uop and speculative execution trace) and a6ca9ce4de61b6141912280516371936d54c47d0 (feat: Use InstSeqNum Bundle for PerfCCT).
October 2025
July 2025
1 Commits • 1 Features
Jul 1, 2025July 2025 focused on refining i386 PTA bitmask configuration in the rust-lang/gcc repository. Implemented missing bitmasks, fixed a potential typo, and clarified architecture definitions to improve build reliability and maintainability across multiple i386 targets.
July 2025
1 Commits • 1 Features
Jul 1, 2025July 2025 focused on refining i386 PTA bitmask configuration in the rust-lang/gcc repository. Implemented missing bitmasks, fixed a potential typo, and clarified architecture definitions to improve build reliability and maintainability across multiple i386 targets.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 — OpenXiangShan/XiangShan-doc: Delivered targeted publications documentation update for 'Single-Address-Space FaaS with Jord', including authors, affiliations, and ISCA'25 venue. Patch linked to commit 856054e7ac5c8070663205aad6e5144915bde4f6. No major bugs fixed this month; maintenance focused on documentation hygiene and alignment with ISCA'25 timeline. Impact: improved knowledge base discoverability and external credibility; accelerates collaboration and onboarding. Skills: documentation standards, version control, and publications workflow.
1 Commits • 1 Features
Jun 1, 2025June 2025 — OpenXiangShan/XiangShan-doc: Delivered targeted publications documentation update for 'Single-Address-Space FaaS with Jord', including authors, affiliations, and ISCA'25 venue. Patch linked to commit 856054e7ac5c8070663205aad6e5144915bde4f6. No major bugs fixed this month; maintenance focused on documentation hygiene and alignment with ISCA'25 timeline. Impact: improved knowledge base discoverability and external credibility; accelerates collaboration and onboarding. Skills: documentation standards, version control, and publications workflow.
June 2025
December 2024
1 Commits
Dec 1, 2024Monthly work summary for 2024-12 focusing on documentation accuracy and technical quality in OI-wiki/OI-wiki.
December 2024
1 Commits
Dec 1, 2024Monthly work summary for 2024-12 focusing on documentation accuracy and technical quality in OI-wiki/OI-wiki.
October 2024
1 Commits
Oct 1, 2024Concise monthly summary for 2024-10 focusing on the zephyrproject-rtos/gcc repository. Delivered a critical AArch64 CPU features symbol lookup fix under LTO, resolving linker errors and stabilizing multiversioning for AArch64 under Link Time Optimization. This work improves build reliability and enables LTO-enabled optimizations in Zephyr's GCC toolchain.
1 Commits
Oct 1, 2024Concise monthly summary for 2024-10 focusing on the zephyrproject-rtos/gcc repository. Delivered a critical AArch64 CPU features symbol lookup fix under LTO, resolving linker errors and stabilizing multiversioning for AArch64 under Link Time Optimization. This work improves build reliability and enables LTO-enabled optimizations in Zephyr's GCC toolchain.
October 2024
Activity
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Quality Metrics
Correctness98.4%
Maintainability96.6%
Architecture98.4%
Performance96.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++MarkdownScala
Technical Skills
AArch64 ArchitectureChiselCompiler DevelopmentCompiler developmentDigital DesignDocumentationHardware DesignHardware TracingLinker OptimizationLow-Level ProgrammingLow-level programmingMicroarchitecturePerformance AnalysisSystem DesignSystem architecture
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline
zephyrproject-rtos/gcc
Oct 2024 – Oct 2024
1 Month active
Languages Used
C++
Technical Skills
AArch64 ArchitectureCompiler DevelopmentLinker Optimization
OI-wiki/OI-wiki
Dec 2024 – Dec 2024
1 Month active
Languages Used
Markdown
Technical Skills
Documentation
OpenXiangShan/XiangShan-doc
Jun 2025 – Jun 2025
1 Month active
Languages Used
Markdown
Technical Skills
Documentation
rust-lang/gcc
Jul 2025 – Jul 2025
1 Month active
Languages Used
C++
Technical Skills
Compiler developmentLow-level programmingSystem architecture