google/perfetto
Dec 2024 – Mar 2026
15 Months active
Languages Used
C++GNShellPythonSQLTypeScriptprotoJavaScript
Technical Skills
Build SystemsCross-CompilationCross-Platform DevelopmentEmbedded SystemsOperating System DevelopmentQNX
jahdiel-alvarez
PROFILE
Jahdiel-alvarez
Jahdiel developed core tracing and system programming features for the google/perfetto repository, focusing on cross-platform kernel trace analysis, virtualization, and multi-machine observability. He modernized process and thread tracking APIs, introduced protocol buffer-based data models for kernel process trees, and enhanced trace visualization in the UI. Using C++, TypeScript, and Protocol Buffers, Jahdiel implemented robust inter-process communication, improved memory management, and enabled accurate multi-VM trace representation. His work addressed complex issues such as remote producer data transfer, idle thread specification, and error handling in trace state transitions, resulting in more reliable, scalable, and maintainable performance analysis tooling across diverse environments.
Overall Statistics
Feature vs Bugs
70%Features
Repository Contributions
45Total
Bugs
9
Commits
45
Features
21
Lines of code
6,860
Activity Months15
Your Network
4619 peopleSame Organization
@google.com4386
Benedict OdaiMember
Craig IngramMember
KayyuriMember
Scott SuarezMember
Agent2Agent (A2A) BotMember
Andreas AbelMember
Aadi KapurMember
Aadish GoelMember
Aahil MehtaMember
Shared Repositories
233
Work History
March 2026
1 Commits
Mar 1, 2026In 2026-03 for google/perfetto, focused on stabilizing IPC data transfer in SMB emulation mode by addressing frame size issues and potential buffer overflows. Implemented a robust fix that splits large CommitDataRequest IPC messages into smaller requests, ensuring reliable data transmission in the tracing service even when large commit data is involved.
1 Commits
Mar 1, 2026In 2026-03 for google/perfetto, focused on stabilizing IPC data transfer in SMB emulation mode by addressing frame size issues and potential buffer overflows. Implemented a robust fix that splits large CommitDataRequest IPC messages into smaller requests, ensuring reliable data transmission in the tracing service even when large commit data is involved.
March 2026
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 performance summary for google/perfetto: Implemented a data-model enhancement to support generic kernel traces without assuming a single idle thread (Android-style). Added an is_idle field to GenericKernelProcessTree::Thread to mark idle threads, enabling producers to specify idle-threads across multiple CPUs and platforms. This change addresses Bug 477296575 and was implemented in commit caaa80f82db69c46605a6b1d9dd3c88a83d68a81. Result: more accurate kernel-trace representation, improved CPU utilization analysis, and broader platform compatibility for Perfetto traces.
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 performance summary for google/perfetto: Implemented a data-model enhancement to support generic kernel traces without assuming a single idle thread (Android-style). Added an is_idle field to GenericKernelProcessTree::Thread to mark idle threads, enabling producers to specify idle-threads across multiple CPUs and platforms. This change addresses Bug 477296575 and was implemented in commit caaa80f82db69c46605a6b1d9dd3c88a83d68a81. Result: more accurate kernel-trace representation, improved CPU utilization analysis, and broader platform compatibility for Perfetto traces.
December 2025
1 Commits • 1 Features
Dec 1, 2025Monthly summary for 2025-12: Google Perfetto feature delivery and bug fixes around Remote Producer SMB Scraping with Shared Memory Emulation. End-to-end implementation enabling remote producers to self-scrape buffers via shared memory emulation and send trace data back to the tracing service. Tracing service refactor to consistently emit flush requests for shmem-emulated producers and to drop service-side SMB scraping for those producers. Fixed shared memory setup to properly configure use_shmem_emulation in shmem_abi, ensuring emulation paths initialize correctly. Introduced a robust producer-driven data path where flush requests trigger self-scrapes, uncommitted chunks are marked complete, and data is committed back to the tracing service. Result: improved reliability, data integrity, and scalability for remote tracing pipelines. Bug fixes tracked: 456746462, 462494442.
1 Commits • 1 Features
Dec 1, 2025Monthly summary for 2025-12: Google Perfetto feature delivery and bug fixes around Remote Producer SMB Scraping with Shared Memory Emulation. End-to-end implementation enabling remote producers to self-scrape buffers via shared memory emulation and send trace data back to the tracing service. Tracing service refactor to consistently emit flush requests for shmem-emulated producers and to drop service-side SMB scraping for those producers. Fixed shared memory setup to properly configure use_shmem_emulation in shmem_abi, ensuring emulation paths initialize correctly. Introduced a robust producer-driven data path where flush requests trigger self-scrapes, uncommitted chunks are marked complete, and data is committed back to the tracing service. Result: improved reliability, data integrity, and scalability for remote tracing pipelines. Bug fixes tracked: 456746462, 462494442.
December 2025
November 2025
1 Commits
Nov 1, 2025Month: 2025-11 — Concise monthly summary for Perfetto developer work highlighting key accomplishments, major bugs fixed, impact, and technologies demonstrated. This month focused on correcting multi-VM trace representation in AndroidLog by using the machine table to identify machine IDs when the CPU table is not populated, improving data accuracy and UI consistency across the AndroidLog panel. Delivered a targeted fix with the referenced commit to address the multi-VM machine-ID identification bug and its impact on user workflows.
November 2025
1 Commits
Nov 1, 2025Month: 2025-11 — Concise monthly summary for Perfetto developer work highlighting key accomplishments, major bugs fixed, impact, and technologies demonstrated. This month focused on correcting multi-VM trace representation in AndroidLog by using the machine table to identify machine IDs when the CPU table is not populated, improving data accuracy and UI consistency across the AndroidLog panel. Delivered a targeted fix with the referenced commit to address the multi-VM machine-ID identification bug and its impact on user workflows.
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
Correctness94.2%
Maintainability89.8%
Architecture90.8%
Performance86.6%
AI Usage21.4%
Skills & Technologies
Programming Languages
C++GNJavaScriptProtoPythonSCSSSQLShellTypeScriptproto
Technical Skills
API DesignAPI RefactoringAndroid DevelopmentBackend DevelopmentBuild SystemsC++C++ DevelopmentC++ programmingCode GenerationCode RefactoringCode StandardizationConfiguration ManagementCross-CompilationCross-Platform DevelopmentData Analysis
Repositories Contributed To
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