The-OpenROAD-Project/OpenROAD
Jan 2025 – May 2026
17 Months active
Languages Used
C++DEFDefGitJSONMarkdownPythonShell
Technical Skills
Algorithm ImplementationAlgorithm OptimizationBackend DevelopmentBug FixingBuild SystemBuild Systems
Eder Monteiro
PROFILE
Eder Monteiro
Contributed extensively to The-OpenROAD-Project/OpenROAD, building and refining core EDA infrastructure for large-scale chip design automation. Focused on routing, placement, and estimation workflows, this developer engineered robust C++ solutions for global routing, parasitic estimation, and constraint management, leveraging technologies such as Bazel and Tcl scripting for scalable builds and automation. Their work emphasized code quality through systematic refactoring, static analysis, and expanded test coverage, while optimizing algorithms for performance and reliability. By addressing complex data integration, parallelization, and CI stability challenges, they enabled reproducible, high-throughput design flows and improved maintainability across the codebase, supporting rapid iteration and roadmap acceleration.
Overall Statistics
Feature vs Bugs
66%Features
Repository Contributions
804Total
Bugs
133
Commits
804
Features
255
Lines of code
56,252,930
Activity Months17
Your Network
115 peopleSame Organization
@precisioninno.com16
Shared Repositories
99
TheUnnamedOne-designMember
Ahmed R. MohamedMember
alokkumardalei-wqMember
Andreas WendlederMember
andyfox-rushcMember
arthurjoloMember
arthurMember
Arthur KoucherMember
Augusto BerndtMember
Work History
May 2026
1 Commits
May 1, 2026May 2026 (The-OpenROAD-Project/OpenROAD) – Focused on CI stability and scalable design processing. Key features delivered: CI Stability Enhancement by refactoring updateBinsNonPlaceArea to use per-bin lists of non-place instances, avoiding a global polygon set; improves scalability and prevents CI timeouts. Major bugs fixed: replaced the O(B * total_fixed_rects) hot path with per-bin computation; added a fast path for bins with a single overlapping instance using plain int64 arithmetic, guaranteeing bit-exact results with the prior Boost.Polygon approach; Gaussian-smoothed nonPlaceArea accumulation and the union_area * targetDensity * 1.10 clamp behavior remain unchanged. Overall impact and accomplishments: stabilizes CI for large designs, reduces runtime variability, and maintains output parity with the previous implementation, laying groundwork for future scalability and reliability. Technologies/skills demonstrated: C++ optimization, per-bin spatial indexing, integer-arithmetic fast-path, Boost.Polygon familiarity, performance tuning, and regression-safe code changes.
1 Commits
May 1, 2026May 2026 (The-OpenROAD-Project/OpenROAD) – Focused on CI stability and scalable design processing. Key features delivered: CI Stability Enhancement by refactoring updateBinsNonPlaceArea to use per-bin lists of non-place instances, avoiding a global polygon set; improves scalability and prevents CI timeouts. Major bugs fixed: replaced the O(B * total_fixed_rects) hot path with per-bin computation; added a fast path for bins with a single overlapping instance using plain int64 arithmetic, guaranteeing bit-exact results with the prior Boost.Polygon approach; Gaussian-smoothed nonPlaceArea accumulation and the union_area * targetDensity * 1.10 clamp behavior remain unchanged. Overall impact and accomplishments: stabilizes CI for large designs, reduces runtime variability, and maintains output parity with the previous implementation, laying groundwork for future scalability and reliability. Technologies/skills demonstrated: C++ optimization, per-bin spatial indexing, integer-arithmetic fast-path, Boost.Polygon familiarity, performance tuning, and regression-safe code changes.
May 2026
April 2026
30 Commits • 10 Features
Apr 1, 2026April 2026 monthly summary for The OpenROAD project. Delivered robust GRT fixes, deterministic serialization improvements, and tooling/architecture refinements that improve stability, reproducibility, and performance. Key outcomes include consolidated GRT robustness fixes, expanded test coverage, deterministic data ordering, batching policy refinements, and enhanced code health.
April 2026
30 Commits • 10 Features
Apr 1, 2026April 2026 monthly summary for The OpenROAD project. Delivered robust GRT fixes, deterministic serialization improvements, and tooling/architecture refinements that improve stability, reproducibility, and performance. Key outcomes include consolidated GRT robustness fixes, expanded test coverage, deterministic data ordering, batching policy refinements, and enhanced code health.
March 2026
80 Commits • 17 Features
Mar 1, 2026March 2026 performance highlights for The OpenROAD project. Focused on enhancing GRt routing capabilities, solidifying core refactor efforts, and advancing code quality across GRT and related subsystems. Major bug fixes increased reliability of net restoration, resource handling, and clock-net validation in CUGR, while test and OK-file updates improved CI stability. The work delivered business value through more robust routing operations, improved maintainability, and a cleaner, more scalable codebase suitable for upcoming feature iterations.
80 Commits • 17 Features
Mar 1, 2026March 2026 performance highlights for The OpenROAD project. Focused on enhancing GRt routing capabilities, solidifying core refactor efforts, and advancing code quality across GRT and related subsystems. Major bug fixes increased reliability of net restoration, resource handling, and clock-net validation in CUGR, while test and OK-file updates improved CI stability. The work delivered business value through more robust routing operations, improved maintainability, and a cleaner, more scalable codebase suitable for upcoming feature iterations.
March 2026
February 2026
16 Commits • 4 Features
Feb 1, 2026February 2026 monthly summary for The-OpenROAD-Project/OpenROAD. Delivered tooling and performance improvements to streamline early-stage evaluation, routing, and robustness across the design flow. The work emphasizes business value by enabling faster iterations, more reliable outcomes, and maintainable codebase alignment. Key highlights: - Rudy tooling initialization support for pins not yet placed, enabling early-stage evaluation by skipping pins without geometries instead of failing. - Routing resource management and net construction efficiency improvements, including subset-net processing, guarded resource additions, incremental routing adjustments, and tests aligned to connected nets, reducing compute and memory use. - Codebase synchronization and branch integration to keep est_via_res and grt_restore_guides up-to-date with master changes, ensuring coherent development across branches. - Parasitic estimation and clock-mode optimizations to avoid unnecessary Steiner tree builds for ideal clocks and refine clock-mode checks, accelerating timing analysis paths. - Robustness and error handling enhancements with dbNet existence checks and non-fatal error behavior, increasing reliability of design flows and reducing task termination on non-critical issues. Overall impact: Improved evaluation readiness, faster routing iterations, more resilient tooling, and a maintainable, synchronized codebase, supporting higher throughput in design cycles and more predictable outcomes for downstream engineering teams.
February 2026
16 Commits • 4 Features
Feb 1, 2026February 2026 monthly summary for The-OpenROAD-Project/OpenROAD. Delivered tooling and performance improvements to streamline early-stage evaluation, routing, and robustness across the design flow. The work emphasizes business value by enabling faster iterations, more reliable outcomes, and maintainable codebase alignment. Key highlights: - Rudy tooling initialization support for pins not yet placed, enabling early-stage evaluation by skipping pins without geometries instead of failing. - Routing resource management and net construction efficiency improvements, including subset-net processing, guarded resource additions, incremental routing adjustments, and tests aligned to connected nets, reducing compute and memory use. - Codebase synchronization and branch integration to keep est_via_res and grt_restore_guides up-to-date with master changes, ensuring coherent development across branches. - Parasitic estimation and clock-mode optimizations to avoid unnecessary Steiner tree builds for ideal clocks and refine clock-mode checks, accelerating timing analysis paths. - Robustness and error handling enhancements with dbNet existence checks and non-fatal error behavior, increasing reliability of design flows and reducing task termination on non-critical issues. Overall impact: Improved evaluation readiness, faster routing iterations, more resilient tooling, and a maintainable, synchronized codebase, supporting higher throughput in design cycles and more predictable outcomes for downstream engineering teams.
January 2026
50 Commits • 19 Features
Jan 1, 2026January 2026 OpenROAD monthly summary: Delivered key features and stability improvements across ODB, GRt, and related tooling, driving tangible business value in routing quality, predictability, and developer productivity. ODB lifecycle improvements refactor the NetMerge sequence by moving inDbNetPreMerge calls to after pins are connected to the survivor net and renaming inDbNetPreMerge to inDbNetPostMerge, along with setting Metal 2 as the default minimum routing layer to align with modern process constraints. GRt introduced major global routing enhancements, including updateNetPins, runtime reporting, safety improvements, suggestions, and a comprehensive refactor, plus runtime controls for verbose output. Incremental routing capabilities were strengthened with incremental start/end functions and Tcl interface integration, enabling faster, more deterministic routing iterations. Code quality and test hygiene were improved with clang-format and clang-tidy updates, along with updated ok files and broader test maintenance, stabilizing builds and reducing drift. Collectively these changes reduce routing risk, accelerate iteration cycles, and lay a solid foundation for timing-driven optimizations and future features.
50 Commits • 19 Features
Jan 1, 2026January 2026 OpenROAD monthly summary: Delivered key features and stability improvements across ODB, GRt, and related tooling, driving tangible business value in routing quality, predictability, and developer productivity. ODB lifecycle improvements refactor the NetMerge sequence by moving inDbNetPreMerge calls to after pins are connected to the survivor net and renaming inDbNetPreMerge to inDbNetPostMerge, along with setting Metal 2 as the default minimum routing layer to align with modern process constraints. GRt introduced major global routing enhancements, including updateNetPins, runtime reporting, safety improvements, suggestions, and a comprehensive refactor, plus runtime controls for verbose output. Incremental routing capabilities were strengthened with incremental start/end functions and Tcl interface integration, enabling faster, more deterministic routing iterations. Code quality and test hygiene were improved with clang-format and clang-tidy updates, along with updated ok files and broader test maintenance, stabilizing builds and reducing drift. Collectively these changes reduce routing risk, accelerate iteration cycles, and lay a solid foundation for timing-driven optimizations and future features.
January 2026
December 2025
81 Commits • 27 Features
Dec 1, 2025December 2025 performance summary for The-OpenROAD-Project/OpenROAD: Delivered core functionality around clock nets, congestion-capacity modeling, and routing stability improvements; advanced GRT/GRNet initialization and guide-restoration workflows; and improved code quality and CI readiness. Resulting in more accurate timing nets, improved congestion estimates, faster routing computations, and more maintainable codebase with reliable builds.
December 2025
81 Commits • 27 Features
Dec 1, 2025December 2025 performance summary for The-OpenROAD-Project/OpenROAD: Delivered core functionality around clock nets, congestion-capacity modeling, and routing stability improvements; advanced GRT/GRNet initialization and guide-restoration workflows; and improved code quality and CI readiness. Resulting in more accurate timing nets, improved congestion estimates, faster routing computations, and more maintainable codebase with reliable builds.
November 2025
2 Commits
Nov 1, 2025November 2025 monthly summary for The-OpenROAD-Project/OpenROAD focused on stabilizing the undo workflow for destroyed instances and preserving origin metadata. Delivered a targeted bug fix that ensures undo of destroyed instances correctly restores original coordinates by refactoring dbJournal::undo_deleteObject to call setOrigin on dbInstObj. Added regression test coverage (test_undo_inst_destroy) to validate origin restoration, increasing confidence in design flows that rely on undo operations. This work reduces risk of corrupted design state when undoing deletions and improves reliability of the user workflow in the OpenROAD design environment.
2 Commits
Nov 1, 2025November 2025 monthly summary for The-OpenROAD-Project/OpenROAD focused on stabilizing the undo workflow for destroyed instances and preserving origin metadata. Delivered a targeted bug fix that ensures undo of destroyed instances correctly restores original coordinates by refactoring dbJournal::undo_deleteObject to call setOrigin on dbInstObj. Added regression test coverage (test_undo_inst_destroy) to validate origin restoration, increasing confidence in design flows that rely on undo operations. This work reduces risk of corrupted design state when undoing deletions and improves reliability of the user workflow in the OpenROAD design environment.
November 2025
October 2025
33 Commits • 7 Features
Oct 1, 2025October 2025 monthly summary for The-OpenROAD-Project/OpenROAD focusing on delivering core platform improvements, robustness, and build reliability to accelerate roadmap milestones and reduce integration risk.
October 2025
33 Commits • 7 Features
Oct 1, 2025October 2025 monthly summary for The-OpenROAD-Project/OpenROAD focusing on delivering core platform improvements, robustness, and build reliability to accelerate roadmap milestones and reduce integration risk.
September 2025
42 Commits • 18 Features
Sep 1, 20252025-09 OpenROAD monthly contributions focused on code quality, build reliability, and data-driven GRT enhancements. Delivered a comprehensive set of refinements across grt, est, ODB/CUGR stacks, and supporting tooling, resulting in improved stability, maintainability, and design insight.
42 Commits • 18 Features
Sep 1, 20252025-09 OpenROAD monthly contributions focused on code quality, build reliability, and data-driven GRT enhancements. Delivered a comprehensive set of refinements across grt, est, ODB/CUGR stacks, and supporting tooling, resulting in improved stability, maintainability, and design insight.
September 2025
August 2025
107 Commits • 40 Features
Aug 1, 2025During August 2025, the OpenROAD project delivered a major modernization of the estimation and routing stack, improving accuracy, performance, and CI readiness while preserving business-critical modeling capabilities for large-scale chip designs. The work focused on renaming and reorganizing the estimation subsystem (GRT -> EST), enhancing build systems, enforcing code quality, expanding test coverage, and accelerating iteration cycles across EST, RSZ, DPL, and GRT/CUGR integrations. Key outcomes include stronger estimation accuracy and reliability, improved build performance and scalability, and tighter integration with the GRT/CUGR routing ecosystem. The effort also stabilized several subsystems by fixing correctness and initialization order issues, restoring expected behaviors (e.g., ok file handling), and introducing more robust callback and data-handling pathways.
August 2025
107 Commits • 40 Features
Aug 1, 2025During August 2025, the OpenROAD project delivered a major modernization of the estimation and routing stack, improving accuracy, performance, and CI readiness while preserving business-critical modeling capabilities for large-scale chip designs. The work focused on renaming and reorganizing the estimation subsystem (GRT -> EST), enhancing build systems, enforcing code quality, expanding test coverage, and accelerating iteration cycles across EST, RSZ, DPL, and GRT/CUGR integrations. Key outcomes include stronger estimation accuracy and reliability, improved build performance and scalability, and tighter integration with the GRT/CUGR routing ecosystem. The effort also stabilized several subsystems by fixing correctness and initialization order issues, restoring expected behaviors (e.g., ok file handling), and introducing more robust callback and data-handling pathways.
July 2025
82 Commits • 23 Features
Jul 1, 2025July 2025 monthly summary for The OpenROAD project focused on enabling parasitic-aware routing capabilities, public API exposure for the Steiner Tree component, and strengthening build, test, and code quality processes. The work spans API exposure, parasitics data integration, toolchain updates, and substantial test and documentation improvements, all aimed at increasing product reliability and throughput of routing workflows.
82 Commits • 23 Features
Jul 1, 2025July 2025 monthly summary for The OpenROAD project focused on enabling parasitic-aware routing capabilities, public API exposure for the Steiner Tree component, and strengthening build, test, and code quality processes. The work spans API exposure, parasitics data integration, toolchain updates, and substantial test and documentation improvements, all aimed at increasing product reliability and throughput of routing workflows.
July 2025
June 2025
63 Commits • 22 Features
Jun 1, 2025June 2025 summary for The-OpenROAD-Project/OpenROAD focusing on stabilizing core data handling, advancing wire-building workflows, and strengthening GRT/GRt pipelines while lifting code quality and test coverage.
June 2025
63 Commits • 22 Features
Jun 1, 2025June 2025 summary for The-OpenROAD-Project/OpenROAD focusing on stabilizing core data handling, advancing wire-building workflows, and strengthening GRT/GRt pipelines while lifting code quality and test coverage.
May 2025
19 Commits • 6 Features
May 1, 2025May 2025 monthly delivery focused on stability, reliability, and builder tooling for The-OpenROAD-Project/OpenROAD. Delivered key features for Access Point lifecycle, Global Router improvements, default vias integration, and constraint robustness, with expanded tests and a refreshed build environment. These changes reduce risk in large-scale designs, speed up routing, improve error visibility, and simplify design migrations.
19 Commits • 6 Features
May 1, 2025May 2025 monthly delivery focused on stability, reliability, and builder tooling for The-OpenROAD-Project/OpenROAD. Delivered key features for Access Point lifecycle, Global Router improvements, default vias integration, and constraint robustness, with expanded tests and a refreshed build environment. These changes reduce risk in large-scale designs, speed up routing, improve error visibility, and simplify design migrations.
May 2025
April 2025
67 Commits • 21 Features
Apr 1, 2025For 2025-04, The-OpenROAD-Project/OpenROAD delivered reliability improvements, data persistence enhancements, and code quality improvements across PPL and ODB, with targeted bug fixes and expanded unit-test coverage. The work focused on ensuring robust persistence of design constraints, top-layer pins, and grid data, while enhancing data modeling and cost/ranking flows for pin placement. This set of changes strengthens flow stability, data integrity, and developer productivity across the design automation stack.
April 2025
67 Commits • 21 Features
Apr 1, 2025For 2025-04, The-OpenROAD-Project/OpenROAD delivered reliability improvements, data persistence enhancements, and code quality improvements across PPL and ODB, with targeted bug fixes and expanded unit-test coverage. The work focused on ensuring robust persistence of design constraints, top-layer pins, and grid data, while enhancing data modeling and cost/ranking flows for pin placement. This set of changes strengthens flow stability, data integrity, and developer productivity across the design automation stack.
March 2025
49 Commits • 13 Features
Mar 1, 2025Summary for 2025-03: The OpenROAD team delivered substantive PPL and ODB enhancements, expanded test coverage, and strengthened build/test tooling, driving reliability and verification accuracy. Key features include PPL slot generation/validation with regex-enabled pin groups and extensive unit tests; PPL/ODB integration with mirrored pins, DB-backed pin groups, and IO/constraint handling; Tcl helpers for pin groups and constraints; performance-focused cost model updates for mirrored pins; and CI/build improvements including code quality tooling and updated verification environments. Major bugs were addressed via cleanup and fixes to ppl_aux, enforcement of mandatory -region arguments for exclude_io_pin_region, and related constraint-handling fixes. These efforts collectively improve verification accuracy, reduce regression risk, and accelerate future feature work.
49 Commits • 13 Features
Mar 1, 2025Summary for 2025-03: The OpenROAD team delivered substantive PPL and ODB enhancements, expanded test coverage, and strengthened build/test tooling, driving reliability and verification accuracy. Key features include PPL slot generation/validation with regex-enabled pin groups and extensive unit tests; PPL/ODB integration with mirrored pins, DB-backed pin groups, and IO/constraint handling; Tcl helpers for pin groups and constraints; performance-focused cost model updates for mirrored pins; and CI/build improvements including code quality tooling and updated verification environments. Major bugs were addressed via cleanup and fixes to ppl_aux, enforcement of mandatory -region arguments for exclude_io_pin_region, and related constraint-handling fixes. These efforts collectively improve verification accuracy, reduce regression risk, and accelerate future feature work.
March 2025
February 2025
31 Commits • 12 Features
Feb 1, 2025February 2025 highlights focus stability, quality, and capacity planning across OpenROAD modules. Major actions included stabilizing MPL flows by reverting two MPL-related PRs, delivering PPL enhancements with location-aware slot information, clang-tidy and refactoring improvements, and slot reporting to support capacity planning; reorganizations in DPL-One-Site and DPO with reverts, reapply, padding removal and new Blockage data structures and 1-site gap checks; ODB data structure enhancements including BTermGroup, mirrored pin data, and code quality tidyups; progress on core routing with PPL layer spacing; and a Pattern Matching Enhancement that leverages all tracks when valid minimum distance allows, improving matching accuracy. Collectively these changes reduce risk, improve scheduling accuracy, and raise maintainability, enabling faster delivery of routing and placement tasks.
February 2025
31 Commits • 12 Features
Feb 1, 2025February 2025 highlights focus stability, quality, and capacity planning across OpenROAD modules. Major actions included stabilizing MPL flows by reverting two MPL-related PRs, delivering PPL enhancements with location-aware slot information, clang-tidy and refactoring improvements, and slot reporting to support capacity planning; reorganizations in DPL-One-Site and DPO with reverts, reapply, padding removal and new Blockage data structures and 1-site gap checks; ODB data structure enhancements including BTermGroup, mirrored pin data, and code quality tidyups; progress on core routing with PPL layer spacing; and a Pattern Matching Enhancement that leverages all tracks when valid minimum distance allows, improving matching accuracy. Collectively these changes reduce risk, improve scheduling accuracy, and raise maintainability, enabling faster delivery of routing and placement tasks.
January 2025
51 Commits • 16 Features
Jan 1, 2025January 2025 monthly summary for The OpenROAD project focusing on delivering core features, improving code quality, and stabilizing CI/QA pipelines. Key feature work extended DPL analysis capabilities, added RCX formatting and documentation hygiene, and advanced PPL/STA testability with layout/tracks improvements and submodule updates. The month also included targeted stability fixes and essential bug work to harden the toolchain and CI expectations, setting a strong foundation for upcoming releases.
51 Commits • 16 Features
Jan 1, 2025January 2025 monthly summary for The OpenROAD project focusing on delivering core features, improving code quality, and stabilizing CI/QA pipelines. Key feature work extended DPL analysis capabilities, added RCX formatting and documentation hygiene, and advanced PPL/STA testability with layout/tracks improvements and submodule updates. The month also included targeted stability fixes and essential bug work to harden the toolchain and CI expectations, setting a strong foundation for upcoming releases.
January 2025
Activity
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Quality Metrics
Correctness88.6%
Maintainability87.8%
Architecture84.8%
Performance81.4%
AI Usage21.2%
Skills & Technologies
Programming Languages
BUILDBazelCC++CMakeConfigurationDEFDefGitJSON
Technical Skills
3D RoutingAPI DesignAPI deprecationAlgorithm DesignAlgorithm DevelopmentAlgorithm ImplementationAlgorithm OptimizationAlgorithm RemovalAlgorithmsAntenna Effect AnalysisAntenna RepairAntenna Rule CheckingAutomationBackend DevelopmentBazel
Repositories Contributed To
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