google/perfetto
Nov 2024 – Jun 2026
18 Months active
Languages Used
C++JavaScriptTypeScriptShellPythonJavaMarkdownProto
Technical Skills
DebuggingKernel TracingPerformance AnalysisPerformance OptimizationSystem ProgrammingUI Development
Ryan
PROFILE
Ryan
Over 18 months, contributed to the google/perfetto repository by engineering advanced tracing, profiling, and memory analysis features for Android and Linux systems. Developed robust kernel tracing and memory profiling pipelines, introducing dynamic ftrace event parsing, self-describing protobuf encoding, and enhanced visualization plugins. Leveraged C++, Python, and Protocol Buffers to improve trace fidelity, performance, and maintainability, while addressing cross-platform compatibility and build automation. Focused on code quality through systematic refactoring, code formatting, and documentation updates. Delivered solutions for kernel thread analysis, multi-machine tracing, and memory redaction, enabling more accurate diagnostics and streamlined workflows for developers and performance engineers.
Overall Statistics
Feature vs Bugs
75%Features
Repository Contributions
102Total
Bugs
14
Commits
102
Features
43
Lines of code
18,286
Activity Months18
Your Network
5262 peopleSame Organization
@google.com5001
Benedict OdaiMember
Craig IngramMember
KayyuriMember
Scott SuarezMember
Agent2Agent (A2A) BotMember
Andreas AbelMember
Aadi KapurMember
Aadish GoelMember
Aahil MehtaMember
Shared Repositories
261
Work History
June 2026
8 Commits • 4 Features
Jun 1, 2026June 2026: Delivered a focused set of memory profiling and tracing enhancements for Perfetto in google/perfetto, improving observability, accuracy, and maintainability. Key outcomes include (1) Smaps Protocol/Proto enhancements with an explicit Smaps enum to indicate which implementation generated a snapshot, and refined SmapsPacket scope for clearer recording types and parsing; (2) a new Smaps Visualization Plugin that displays process-scoped smaps tracks with memory-mapping snapshots in a datagrid, enabling more intuitive memory usage analysis; (3) added wildcard support for heap profiling command line matching to target running processes more flexibly, with explicit compatibility constraints to avoid startup-profiling surprises; (4) dependency cleanup removing pblite to reduce maintenance friction related to libprotobuf; (5) repository/tooling and trace accuracy improvements, including renaming OWNERS to OWNERS.github and introducing an explicit main-thread message in ProcessTree with a rollback flag to guard against configuration drift. These changes collectively raise profiling fidelity, reduce troubleshooting time, and lower long-term maintenance costs across the tracing pipeline.
8 Commits • 4 Features
Jun 1, 2026June 2026: Delivered a focused set of memory profiling and tracing enhancements for Perfetto in google/perfetto, improving observability, accuracy, and maintainability. Key outcomes include (1) Smaps Protocol/Proto enhancements with an explicit Smaps enum to indicate which implementation generated a snapshot, and refined SmapsPacket scope for clearer recording types and parsing; (2) a new Smaps Visualization Plugin that displays process-scoped smaps tracks with memory-mapping snapshots in a datagrid, enabling more intuitive memory usage analysis; (3) added wildcard support for heap profiling command line matching to target running processes more flexibly, with explicit compatibility constraints to avoid startup-profiling surprises; (4) dependency cleanup removing pblite to reduce maintenance friction related to libprotobuf; (5) repository/tooling and trace accuracy improvements, including renaming OWNERS to OWNERS.github and introducing an explicit main-thread message in ProcessTree with a rollback flag to guard against configuration drift. These changes collectively raise profiling fidelity, reduce troubleshooting time, and lower long-term maintenance costs across the tracing pipeline.
June 2026
May 2026
6 Commits • 1 Features
May 1, 2026In May 2026, delivered major enhancements to Perfetto's memory profiling with Smaps improvements, platform-compatibility work, and internal API alignment. The work accelerates and hardens memory analysis for Android and Chrome memory tooling, improves privacy controls, and keeps CI rolling across platforms.
May 2026
6 Commits • 1 Features
May 1, 2026In May 2026, delivered major enhancements to Perfetto's memory profiling with Smaps improvements, platform-compatibility work, and internal API alignment. The work accelerates and hardens memory analysis for Android and Chrome memory tooling, improves privacy controls, and keeps CI rolling across platforms.
April 2026
1 Commits • 1 Features
Apr 1, 2026April 2026: Delivered Dynamic PMU naming for raw performance events in google/perfetto, enabling specifying PMUs by name for raw events and improving portability across platforms with varying PMU IDs. The change patches Ali's #4744 on top of main, and includes minimal QoL improvements for raw event encoding. Co-authored by Ali Utku Selen. Result: more robust performance traces, reduced configuration churn, and broader platform coverage.
1 Commits • 1 Features
Apr 1, 2026April 2026: Delivered Dynamic PMU naming for raw performance events in google/perfetto, enabling specifying PMUs by name for raw events and improving portability across platforms with varying PMU IDs. The change patches Ali's #4744 on top of main, and includes minimal QoL improvements for raw event encoding. Co-authored by Ali Utku Selen. Result: more robust performance traces, reduced configuration churn, and broader platform coverage.
April 2026
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for google/perfetto focused on memory management enhancements for the Bionic environment and improved profiling accuracy. Delivered a new heapprofd_reallocarray hook to enable realloc-based allocations, with an overflow protection path to prevent allocation errors and ensure stable, accurate memory reporting for the new allocation method. This work enhances memory efficiency, reliability, and profiling visibility for Android workloads, supporting better performance analysis and optimization decisions.
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for google/perfetto focused on memory management enhancements for the Bionic environment and improved profiling accuracy. Delivered a new heapprofd_reallocarray hook to enable realloc-based allocations, with an overflow protection path to prevent allocation errors and ensure stable, accurate memory reporting for the new allocation method. This work enhances memory efficiency, reliability, and profiling visibility for Android workloads, supporting better performance analysis and optimization decisions.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for google/perfetto focused on UI/visualization improvements and kernel thread data presentation. Delivered a significant feature enhancement to kernel thread and thread track visualization, reduced UI clutter by removing an empty summary track, and simplified kernel thread queries. These changes improve diagnosability and user efficiency when analyzing kernel thread performance.
1 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for google/perfetto focused on UI/visualization improvements and kernel thread data presentation. Delivered a significant feature enhancement to kernel thread and thread track visualization, reduced UI clutter by removing an empty summary track, and simplified kernel thread queries. These changes improve diagnosability and user efficiency when analyzing kernel thread performance.
December 2025
November 2025
7 Commits • 3 Features
Nov 1, 2025November 2025 performance month focused on strengthening tracing reliability, multi-machine behavior, and developer usability for google/perfetto. Delivered major tracing core enhancements with crash-key instrumentation, expanded shared memory footprint, and a controlled default for cross-machine data matching (with opt-in to restore previous behavior). Updated trace descriptors and tracepoints, and aligned ftrace protocol and proto generation to support newer kernels. Implemented TraceConv auto-detection to simplify profile identification and improved UX when multiple profiles are present. Conducted code cleanup by removing unused trace conversion files, reducing maintenance burden. These changes collectively improve trace fidelity, reduce debugging time, and enable safer, scalable multi-machine tracing across devices and emulators.
November 2025
7 Commits • 3 Features
Nov 1, 2025November 2025 performance month focused on strengthening tracing reliability, multi-machine behavior, and developer usability for google/perfetto. Delivered major tracing core enhancements with crash-key instrumentation, expanded shared memory footprint, and a controlled default for cross-machine data matching (with opt-in to restore previous behavior). Updated trace descriptors and tracepoints, and aligned ftrace protocol and proto generation to support newer kernels. Implemented TraceConv auto-detection to simplify profile identification and improved UX when multiple profiles are present. Conducted code cleanup by removing unused trace conversion files, reducing maintenance burden. These changes collectively improve trace fidelity, reduce debugging time, and enable safer, scalable multi-machine tracing across devices and emulators.
October 2025
6 Commits • 3 Features
Oct 1, 2025October 2025 monthly summary for google/perfetto: Delivered targeted tracing improvements, stability fixes, and code maintenance across the Perfetto repository. Emphasized business value through trace size reductions, improved analysis Readability, and safer Android rollout readiness.
6 Commits • 3 Features
Oct 1, 2025October 2025 monthly summary for google/perfetto: Delivered targeted tracing improvements, stability fixes, and code maintenance across the Perfetto repository. Emphasized business value through trace size reductions, improved analysis Readability, and safer Android rollout readiness.
October 2025
September 2025
7 Commits • 4 Features
Sep 1, 2025September 2025 — Google Perfetto: Delivered deeper performance tracing capabilities, expanded system performance visibility, faster validation feedback, and tightened maintenance practices. These efforts provide clearer perf data for debugging, faster CI cycles, and better ownership alignment across the project.
September 2025
7 Commits • 4 Features
Sep 1, 2025September 2025 — Google Perfetto: Delivered deeper performance tracing capabilities, expanded system performance visibility, faster validation feedback, and tightened maintenance practices. These efforts provide clearer perf data for debugging, faster CI cycles, and better ownership alignment across the project.
August 2025
17 Commits • 8 Features
Aug 1, 2025Summary for Perfetto focusing on business value and technical achievements for 2025-08. Delivered kernel track events support enabling visualization of kernel activity on Perfetto tracks, along with extensive UI and documentation improvements. Strengthened stability and build reliability across platforms, including critical fixes for StatusOr use-after-move, Windows include order, and JNI build flags. Introduced per-CPU ftrace statistics and a conservative 5-minute libunwindstack cache purge to balance memory usage in trace processing. Added user-facing feedback for traced_perf compilation status, improving guidance for users. Enhanced UX and data models with a Hypervisor track group, SurfaceFlinger system_content_priority, and deprecation of legacy data sources, accompanied by comprehensive docs updates to reduce maintenance burden and improve developer experience.
17 Commits • 8 Features
Aug 1, 2025Summary for Perfetto focusing on business value and technical achievements for 2025-08. Delivered kernel track events support enabling visualization of kernel activity on Perfetto tracks, along with extensive UI and documentation improvements. Strengthened stability and build reliability across platforms, including critical fixes for StatusOr use-after-move, Windows include order, and JNI build flags. Introduced per-CPU ftrace statistics and a conservative 5-minute libunwindstack cache purge to balance memory usage in trace processing. Added user-facing feedback for traced_perf compilation status, improving guidance for users. Enhanced UX and data models with a Hypervisor track group, SurfaceFlinger system_content_priority, and deprecation of legacy data sources, accompanied by comprehensive docs updates to reduce maintenance burden and improve developer experience.
August 2025
July 2025
8 Commits • 3 Features
Jul 1, 2025July 2025 (2025-07) monthly recap for google/perfetto focused on enhancing ftrace data reliability, control, and maintainability. Delivered dynamic parsing of self-describing ftrace events via a GenericFtraceTracker to manage proto descriptors and enable FtraceTokenizer/FtraceParser to parse and store data correctly. Added a userspace-only ftrace event collection option to give users tighter control over tracing when atrace categories are specified. Reinstated a ftrace cropping workaround to address widespread trace reliance, with ongoing investigation to identify root causes. Completed internal maintenance and docs alignment for ftrace, including proto readability improvements, internal naming consistency (FtraceProcfs -> Tracefs), code cleanup, and updated usage examples to remain accurate with kernel API changes. Overall, these changes improve data accuracy, configurability, and maintainability, delivering tangible business value through better tracing fidelity and reduced maintenance burden.
July 2025
8 Commits • 3 Features
Jul 1, 2025July 2025 (2025-07) monthly recap for google/perfetto focused on enhancing ftrace data reliability, control, and maintainability. Delivered dynamic parsing of self-describing ftrace events via a GenericFtraceTracker to manage proto descriptors and enable FtraceTokenizer/FtraceParser to parse and store data correctly. Added a userspace-only ftrace event collection option to give users tighter control over tracing when atrace categories are specified. Reinstated a ftrace cropping workaround to address widespread trace reliance, with ongoing investigation to identify root causes. Completed internal maintenance and docs alignment for ftrace, including proto readability improvements, internal naming consistency (FtraceProcfs -> Tracefs), code cleanup, and updated usage examples to remain accurate with kernel API changes. Overall, these changes improve data accuracy, configurability, and maintainability, delivering tangible business value through better tracing fidelity and reduced maintenance burden.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025: Delivered Ftrace Clock Handling Enhancements for google/perfetto, focusing on local clock synchronization, clock-type handling, and improved snapshot fidelity. Also added support for secondary ftrace instances to improve multi-instance tracing. This work enhances trace accuracy, bundle integrity, and debugging reliability across devices and use cases.
2 Commits • 1 Features
Jun 1, 2025June 2025: Delivered Ftrace Clock Handling Enhancements for google/perfetto, focusing on local clock synchronization, clock-type handling, and improved snapshot fidelity. Also added support for secondary ftrace instances to improve multi-instance tracing. This work enhances trace accuracy, bundle integrity, and debugging reliability across devices and use cases.
June 2025
May 2025
2 Commits • 1 Features
May 1, 2025May 2025 monthly summary focusing on key accomplishments and business value for google/perfetto. The month prioritized standardized code formatting and protobuf compatibility improvements to reduce maintenance burden and improve contributor onboarding.Within google/perfetto, two high-impact items were completed: uniform code formatting and protobuf field option remediation.
May 2025
2 Commits • 1 Features
May 1, 2025May 2025 monthly summary focusing on key accomplishments and business value for google/perfetto. The month prioritized standardized code formatting and protobuf compatibility improvements to reduce maintenance burden and improve contributor onboarding.Within google/perfetto, two high-impact items were completed: uniform code formatting and protobuf field option remediation.
April 2025
6 Commits • 4 Features
Apr 1, 2025April 2025 — Performance-focused contributions in google/perfetto: delivered efficient self-describing protobuf encoding for generic ftrace events, reduced CI friction with clang-format-based tab handling, updated docs for protobuf-based synthetic track events, and performed proto maintenance for readability and maintainability. Impact includes improved data encoding efficiency, streamlined CI, and better maintainability across protos.
6 Commits • 4 Features
Apr 1, 2025April 2025 — Performance-focused contributions in google/perfetto: delivered efficient self-describing protobuf encoding for generic ftrace events, reduced CI friction with clang-format-based tab handling, updated docs for protobuf-based synthetic track events, and performed proto maintenance for readability and maintainability. Impact includes improved data encoding efficiency, streamlined CI, and better maintainability across protos.
April 2025
March 2025
20 Commits • 7 Features
Mar 1, 2025March 2025 performance summary for google/perfetto: Delivered core profiling enhancements, improved sampling accuracy, and stronger kernel-thread tracing; tightened the proto/build pipeline; and restructured tests to improve CI reliability. These changes increase data accuracy, core-specific profiling capabilities, and maintainability, enabling faster performance insights for developers and platform teams.
March 2025
20 Commits • 7 Features
Mar 1, 2025March 2025 performance summary for google/perfetto: Delivered core profiling enhancements, improved sampling accuracy, and stronger kernel-thread tracing; tightened the proto/build pipeline; and restructured tests to improve CI reliability. These changes increase data accuracy, core-specific profiling capabilities, and maintainability, enabling faster performance insights for developers and platform teams.
February 2025
3 Commits
Feb 1, 2025February 2025 monthly summary for google/perfetto. Delivered three targeted bug fixes across the tracing pipeline to improve robustness, cross-compiler consistency, and data integrity, without changing core functionality. Highlights include: Breakpad parser cross-compiler error handling fix; Proto generation: kprobe_event ID skipping fix; Ftrace parser TGID handling normalization for DPU tracing mark write events. Commits implemented: 0d854f007653b31635c203068b3c5c0729d65d29; f8977d9b891f18393ed9f06ffac7454c39a04fbc; c020e64c5f6f558682b5dc01098d678009d715fe.
3 Commits
Feb 1, 2025February 2025 monthly summary for google/perfetto. Delivered three targeted bug fixes across the tracing pipeline to improve robustness, cross-compiler consistency, and data integrity, without changing core functionality. Highlights include: Breakpad parser cross-compiler error handling fix; Proto generation: kprobe_event ID skipping fix; Ftrace parser TGID handling normalization for DPU tracing mark write events. Commits implemented: 0d854f007653b31635c203068b3c5c0729d65d29; f8977d9b891f18393ed9f06ffac7454c39a04fbc; c020e64c5f6f558682b5dc01098d678009d715fe.
February 2025
January 2025
2 Commits
Jan 1, 2025January 2025 monthly summary for google/perfetto focused on core robustness and correctness fixes in perf tracing to improve stability and data accuracy across kernel versions and usage scenarios.
January 2025
2 Commits
Jan 1, 2025January 2025 monthly summary for google/perfetto focused on core robustness and correctness fixes in perf tracing to improve stability and data accuracy across kernel versions and usage scenarios.
December 2024
1 Commits • 1 Features
Dec 1, 2024Month: 2024-12 — Performance engineering monthly summary for google/perfetto. Key feature delivered: Kernel Symbolization Visibility on Release Builds. Enabled tracing tools (traced_probes and traced_perf) to inherit a file descriptor to /proc/kallsyms from init, with a locking mechanism to handle concurrent reads, improving visibility of kernel symbols on restricted builds. Commit 061d1aa2dc70787c88a7d31e2fe5dee9621db703 documents: traced_probes, traced_perf: allow kernel symbolisation on release builds with init's assistance.
1 Commits • 1 Features
Dec 1, 2024Month: 2024-12 — Performance engineering monthly summary for google/perfetto. Key feature delivered: Kernel Symbolization Visibility on Release Builds. Enabled tracing tools (traced_probes and traced_perf) to inherit a file descriptor to /proc/kallsyms from init, with a locking mechanism to handle concurrent reads, improving visibility of kernel symbols on restricted builds. Commit 061d1aa2dc70787c88a7d31e2fe5dee9621db703 documents: traced_probes, traced_perf: allow kernel symbolisation on release builds with init's assistance.
December 2024
November 2024
4 Commits
Nov 1, 2024Month: 2024-11 focused on improving Perfetto's tracing reliability and UI data correctness in the google/perfetto repository. The work emphasizes data integrity, reduced data gaps, and accurate visualization, delivering tangible business value for developers relying on precise trace data.
November 2024
4 Commits
Nov 1, 2024Month: 2024-11 focused on improving Perfetto's tracing reliability and UI data correctness in the google/perfetto repository. The work emphasizes data integrity, reduced data gaps, and accurate visualization, delivering tangible business value for developers relying on precise trace data.
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Quality Metrics
Correctness92.4%
Maintainability90.2%
Architecture89.8%
Performance86.4%
AI Usage21.6%
Skills & Technologies
Programming Languages
CC++GNIJavaJavaScriptMakefileMarkdownN/ANoneProto
Technical Skills
Android DevelopmentAndroid InternalsAndroid developmentBug FixingBuild AutomationBuild SystemBuild SystemsBuild Systems (GN/BP)C++C++ DevelopmentC++ developmentCI/CDChangelog ManagementCode CleanupCode Formatting
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline