google/perfetto
Dec 2024 – Oct 2025
11 Months active
Languages Used
C++GNShellPythonSQLTypeScriptprotoJavaScript
Technical Skills
Build SystemsCross-CompilationCross-Platform DevelopmentEmbedded SystemsOperating System DevelopmentQNX
jahdiel-alvarez
PROFILE
Jahdiel-alvarez
Jahdiel contributed to the google/perfetto repository by building and refining cross-platform tracing and process/thread management features, focusing on kernel and virtualization support. He modernized APIs for process and thread tracking, introduced machine-level log filtering, and enhanced trace visualization to improve debugging and multi-VM observability. Using C++, Protocol Buffers, and TypeScript, Jahdiel implemented dynamic configuration, robust error handling, and data validation to ensure trace integrity across diverse environments. His work addressed complex system programming challenges, such as inter-VM communication and kernel process tree parsing, resulting in deeper system insights and more reliable performance analysis for developers and users.
Overall Statistics
Feature vs Bugs
73%Features
Repository Contributions
41Total
Bugs
7
Commits
41
Features
19
Lines of code
6,450
Activity Months11
Your Network
4376 people
Work History
October 2025
2 Commits • 1 Features
Oct 1, 2025October 2025 monthly summary for google/perfetto development focusing on performance instrumentation and trace visualization. Delivered Thread Lifecycle Tracking and Trace Visualization Enhancements with precise end-of-thread semantics and UI representation improvements; introduced robust error handling to preserve data integrity when conflicting events occur at the same timestamp.
2 Commits • 1 Features
Oct 1, 2025October 2025 monthly summary for google/perfetto development focusing on performance instrumentation and trace visualization. Delivered Thread Lifecycle Tracking and Trace Visualization Enhancements with precise end-of-thread semantics and UI representation improvements; introduced robust error handling to preserve data integrity when conflicting events occur at the same timestamp.
October 2025
September 2025
2 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for google/perfetto focused on feature delivery and API simplification that lays groundwork for stability and downstream efficiency. Key work includes Kernel Process Tree Parsing and UI Visualization integration via the GenericKernelProcessTree proto, and a targeted API cleanup to remove AssociateThreadToProcess from ProcessTracker, delegating responsibilities to internal components. No explicit major bugs fixed this month; emphasis was on delivering robust features and reducing future maintenance risk.
September 2025
2 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for google/perfetto focused on feature delivery and API simplification that lays groundwork for stability and downstream efficiency. Key work includes Kernel Process Tree Parsing and UI Visualization integration via the GenericKernelProcessTree proto, and a targeted API cleanup to remove AssociateThreadToProcess from ProcessTracker, delegating responsibilities to internal components. No explicit major bugs fixed this month; emphasis was on delivering robust features and reducing future maintenance risk.
August 2025
6 Commits • 2 Features
Aug 1, 2025August 2025: Perfetto cross-platform process/thread tracking API modernization and Process Metadata API improvements. Delivered decoupled main-thread associations, enabled non-main-thread process creation, and introduced UniqueTid/UniquePid identifiers to unify traces across platforms. Split SetProcessMetadata into two APIs for clarity and improved metadata handling. These changes increase data accuracy, platform coverage, and maintainability, setting the stage for broader tracing features. No user-reported bugs fixed this month; the focus was on architectural refinements that reduce risk and enable future performance improvements.
6 Commits • 2 Features
Aug 1, 2025August 2025: Perfetto cross-platform process/thread tracking API modernization and Process Metadata API improvements. Delivered decoupled main-thread associations, enabled non-main-thread process creation, and introduced UniqueTid/UniquePid identifiers to unify traces across platforms. Split SetProcessMetadata into two APIs for clarity and improved metadata handling. These changes increase data accuracy, platform coverage, and maintainability, setting the stage for broader tracing features. No user-reported bugs fixed this month; the focus was on architectural refinements that reduce risk and enable future performance improvements.
August 2025
July 2025
6 Commits • 5 Features
Jul 1, 2025July 2025 performance summary for google/perfetto. Focused on aligning thread management around UTID in ProcessTracker, implementing safeguards to improve correctness, and expanding configuration controls for multi-VM tracing. Delivered a cohesive modernization of thread APIs, enhanced sandboxed thread handling, and added environment-driven data source filtering to support scalable tracing in complex environments.
July 2025
6 Commits • 5 Features
Jul 1, 2025July 2025 performance summary for google/perfetto. Focused on aligning thread management around UTID in ProcessTracker, implementing safeguards to improve correctness, and expanding configuration controls for multi-VM tracing. Delivered a cohesive modernization of thread APIs, enhanced sandboxed thread handling, and added environment-driven data source filtering to support scalable tracing in complex environments.
June 2025
9 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for google/perfetto: Delivered deeper kernel tracing capabilities, richer machine-system visibility, and a UI reliability fix to improve data quality and reduce debugging time. This month’s work enhances observability and cross-device analysis while tightening UI correctness for the Created thread state.
9 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for google/perfetto: Delivered deeper kernel tracing capabilities, richer machine-system visibility, and a UI reliability fix to improve data quality and reduce debugging time. This month’s work enhances observability and cross-device analysis while tightening UI correctness for the Created thread state.
June 2025
May 2025
2 Commits • 2 Features
May 1, 2025May 2025: Delivered two major features in google/perfetto that enhance cross-OS compatibility and multi-machine log analysis, driving faster debugging and better cross-device insights. Key work includes Android Logs Multi-Machine Filtering (machine ID filter added to AndroidLog plugin to enable per-machine log views across multi-machine traces) and GenericTaskStateEvent Proto for Cross-OS Task State Inference (standardizes task state changes across kernel implementations and enables higher-level inferences such as context switches). Both features include build and trace-processor integration to ensure end-to-end support. Overall impact: improved log navigation, faster root-cause analysis, and stronger cross-OS compatibility. Technologies/skills demonstrated: C++, protocol buffers, build system updates, AndroidLog plugin, and trace processor integration.
May 2025
2 Commits • 2 Features
May 1, 2025May 2025: Delivered two major features in google/perfetto that enhance cross-OS compatibility and multi-machine log analysis, driving faster debugging and better cross-device insights. Key work includes Android Logs Multi-Machine Filtering (machine ID filter added to AndroidLog plugin to enable per-machine log views across multi-machine traces) and GenericTaskStateEvent Proto for Cross-OS Task State Inference (standardizes task state changes across kernel implementations and enables higher-level inferences such as context switches). Both features include build and trace-processor integration to ensure end-to-end support. Overall impact: improved log navigation, faster root-cause analysis, and stronger cross-OS compatibility. Technologies/skills demonstrated: C++, protocol buffers, build system updates, AndroidLog plugin, and trace processor integration.
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 performance highlights centered on enhanced multi-VM observability and build hygiene for Perfetto. Key features were delivered to improve VM-level context, lineage, and cross-machine log differentiation, alongside a build-flag alignment fix that reduces cross-platform build risks.
3 Commits • 1 Features
Apr 1, 2025April 2025 performance highlights centered on enhanced multi-VM observability and build hygiene for Perfetto. Key features were delivered to improve VM-level context, lineage, and cross-machine log differentiation, alongside a build-flag alignment fix that reduces cross-platform build risks.
April 2025
March 2025
3 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for google/perfetto: Focused on CI efficiency and IPC stability, delivering a tangible reduction in unnecessary binary deployments and stabilizing shared memory emulation to enhance data integrity and runtime reliability. Key features delivered include conditional test binary deployment for integration tests, reducing CI file transfers and speeding up test cycles. Major bugs fixed include shmem emulation IPC issues by increasing SMB capacity and ensuring immediate flush of completed chunks to prevent deadlocks and IPC Frame too large errors. Overall impact: faster and more reliable CI pipelines, smoother test and runtime transfers, and stronger integration test reliability. Technologies/skills demonstrated: C/C++ development, test automation and deployment optimization, shared memory IPC tuning, and contributions to CI/CD workflows.
March 2025
3 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for google/perfetto: Focused on CI efficiency and IPC stability, delivering a tangible reduction in unnecessary binary deployments and stabilizing shared memory emulation to enhance data integrity and runtime reliability. Key features delivered include conditional test binary deployment for integration tests, reducing CI file transfers and speeding up test cycles. Major bugs fixed include shmem emulation IPC issues by increasing SMB capacity and ensuring immediate flush of completed chunks to prevent deadlocks and IPC Frame too large errors. Overall impact: faster and more reliable CI pipelines, smoother test and runtime transfers, and stronger integration test reliability. Technologies/skills demonstrated: C/C++ development, test automation and deployment optimization, shared memory IPC tuning, and contributions to CI/CD workflows.
February 2025
3 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for google/perfetto focus on feature enablement and virtualization hardening to improve deployment flexibility and reliability in virtualized Android environments. Delivered mode-switching capability for traced/traced_relay with dynamic relay port configuration and adjusted persistence semantics, plus fixes to ensure stable operation in virtualization contexts.
3 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for google/perfetto focus on feature enablement and virtualization hardening to improve deployment flexibility and reliability in virtualized Android environments. Delivered mode-switching capability for traced/traced_relay with dynamic relay port configuration and adjusted persistence semantics, plus fixes to ensure stable operation in virtualization contexts.
February 2025
January 2025
3 Commits • 1 Features
Jan 1, 2025Month: 2025-01 - Focused on improving virtualization- and Android-build workflows in Perfetto. Key features delivered: optional guest producer socket for Android builds enabling guest-host communication via a system-property-configured address. Major bugs fixed: QNX VSOCK reliability improvements including blocking UnixSocketRaw::Connect and improved VM-to-VM routing with VMADDR_FLAG_TO_HOST and ro.traced.hypervisor property for hypervisor detection. Overall impact: more reliable inter-VM communication, smoother Android build testing in virtualized environments, and stronger cross-VM support. Technologies/skills demonstrated: C/C++, Unix sockets, VSOCK, blocking IO, system-property configuration, VM routing, and hypervisor detection.
January 2025
3 Commits • 1 Features
Jan 1, 2025Month: 2025-01 - Focused on improving virtualization- and Android-build workflows in Perfetto. Key features delivered: optional guest producer socket for Android builds enabling guest-host communication via a system-property-configured address. Major bugs fixed: QNX VSOCK reliability improvements including blocking UnixSocketRaw::Connect and improved VM-to-VM routing with VMADDR_FLAG_TO_HOST and ro.traced.hypervisor property for hypervisor detection. Overall impact: more reliable inter-VM communication, smoother Android build testing in virtualized environments, and stronger cross-VM support. Technologies/skills demonstrated: C/C++, Unix sockets, VSOCK, blocking IO, system-property configuration, VM routing, and hypervisor detection.
December 2024
2 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for google/perfetto: Implemented cross-platform QNX support for Perfetto tracing and fixed critical socket-related issues, enabling reliable tracing on QNX while preserving Linux compatibility and overall system stability.
2 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for google/perfetto: Implemented cross-platform QNX support for Perfetto tracing and fixed critical socket-related issues, enabling reliable tracing on QNX while preserving Linux compatibility and overall system stability.
December 2024
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Quality Metrics
Correctness94.6%
Maintainability90.8%
Architecture91.4%
Performance87.4%
AI Usage20.4%
Skills & Technologies
Programming Languages
C++GNJavaScriptProtoPythonSCSSSQLShellTypeScriptproto
Technical Skills
API DesignAPI RefactoringAndroid DevelopmentBackend DevelopmentBuild SystemsC++C++ DevelopmentCode GenerationCode RefactoringCode StandardizationConfiguration ManagementCross-CompilationCross-Platform DevelopmentData AnalysisData Modeling
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