OpenXiangShan/GEM5
Jun 2025 – Jul 2026
2 Months active
Languages Used
C++
Technical Skills
CPU ArchitectureCPU SimulationCache CoherenceCache SimulationLow-Level ProgrammingLow-level Programming
Ergou-ren
PROFILE
Ergou-ren
Worked on the OpenXiangShan/GEM5 repository, focusing on enhancing simulation fidelity and correctness for RISC-V CPU models. Addressed critical issues in the CPU-O3 pipeline and memory subsystem by refining load-store queue handling, improving data forwarding, and increasing cache hit/miss detection accuracy. Introduced explicit sign-extension logic for the ADDIW instruction to ensure compliance with the RISC-V specification, particularly under Clang PGO builds. Emphasized code maintainability through formatting and cleanup. Leveraged C++ and deep knowledge of computer architecture, CPU simulation, and performance modeling to deliver more reliable and accurate simulation results, supporting robust validation and future optimization efforts.
Overall Statistics
Feature vs Bugs
33%Features
Repository Contributions
7Total
Bugs
2
Commits
7
Features
1
Lines of code
134
Activity Months2
Your Network
34 peopleWork History
July 2026
1 Commits
Jul 1, 2026July 2026: Delivered a critical correctness improvement in the GEM5 RISC-V simulator by fixing the ADDIW sign-extension handling. Replaced direct 32-bit casting with an explicit sign-extension helper to ensure proper sign propagation under Clang PGO builds, aligning 32-bit arithmetic with the RISC-V specification and improving simulation reliability for validation work.
1 Commits
Jul 1, 2026July 2026: Delivered a critical correctness improvement in the GEM5 RISC-V simulator by fixing the ADDIW sign-extension handling. Replaced direct 32-bit casting with an explicit sign-extension helper to ensure proper sign propagation under Clang PGO builds, aligning 32-bit arithmetic with the RISC-V specification and improving simulation reliability for validation work.
July 2026
June 2025
6 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for OpenXiangShan/GEM5: Delivered key correctness and fidelity improvements in the CPU-O3 path and memory subsystem, resulting in more reliable pipeline progression, accurate data forwarding, and improved cache behavior modeling.
June 2025
6 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for OpenXiangShan/GEM5: Delivered key correctness and fidelity improvements in the CPU-O3 path and memory subsystem, resulting in more reliable pipeline progression, accurate data forwarding, and improved cache behavior modeling.
Activity
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Quality Metrics
Correctness87.2%
Maintainability83.0%
Architecture71.4%
Performance74.4%
AI Usage25.8%
Skills & Technologies
Programming Languages
C++
Technical Skills
C++CPU ArchitectureCPU SimulationCache CoherenceCache SimulationComputer ArchitectureLow-Level ProgrammingLow-level ProgrammingMemory System DesignMemory SystemsPerformance ModelingPerformance OptimizationRISC-V ISASimulationSimulator Development
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