google/perfetto
Mar 2026 – May 2026
2 Months active
Languages Used
C++ProtoBufSQL
Technical Skills
C++ developmentperformance tracingprotocol buffer designsystem programmingAndroidLinux
pohengshen
PROFILE
Pohengshen
Worked on the google/perfetto repository to deliver two core features enhancing system observability and performance analysis. Developed the Ftrace Scheduling Group Tracking capability by introducing a sched_group_tracker event, updating protocol buffer definitions and C++ event descriptors to enable detailed tracing of scheduling groups for improved CPU scheduling visibility. Later, implemented the IRQ Mapping Collector in SystemInfo, enabling optional collection and storage of hardware interrupt mappings from Linux and Android systems using ProtoBuf and SQL. Both features focused on system programming and data processing, providing deeper insights into scheduling and interrupt behavior to support more effective debugging and performance optimization.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
2Total
Bugs
0
Commits
2
Features
2
Lines of code
601
Activity Months2
Your Network
5217 peopleSame Organization
@google.com4956
Benedict OdaiMember
Craig IngramMember
KayyuriMember
Scott SuarezMember
Agent2Agent (A2A) BotMember
Andreas AbelMember
Aadi KapurMember
Aadish GoelMember
Aahil MehtaMember
Shared Repositories
261
Work History
May 2026
1 Commits • 1 Features
May 1, 2026May 2026: Delivered IRQ Mapping Collector in SystemInfo for Perfetto, enabling optional collection of IRQ (hardware interrupt) name mappings from /proc/interrupts on Linux and Android. Mappings are stored in the SystemInfo proto and imported into a new interrupt_mapping table in the trace processor, enabling human-readable IRQ name queries. Opt-in is configured via linux.system_info irq_names flag, with SQL Module: linux.irqs. This work enhances observability and debugging capabilities for IRQ-related performance issues and lays groundwork for richer hardware telemetry.
1 Commits • 1 Features
May 1, 2026May 2026: Delivered IRQ Mapping Collector in SystemInfo for Perfetto, enabling optional collection of IRQ (hardware interrupt) name mappings from /proc/interrupts on Linux and Android. Mappings are stored in the SystemInfo proto and imported into a new interrupt_mapping table in the trace processor, enabling human-readable IRQ name queries. Opt-in is configured via linux.system_info irq_names flag, with SQL Module: linux.irqs. This work enhances observability and debugging capabilities for IRQ-related performance issues and lays groundwork for richer hardware telemetry.
May 2026
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary: Delivered the Ftrace Scheduling Group Tracking feature by introducing the sched_group_tracker event in Perfetto. This includes updates to proto definitions and C++ event descriptors, enabling enhanced tracing of scheduling groups and laying groundwork for deeper performance analysis. The work improves root-cause analysis and CPU scheduling visibility, delivering business value through more actionable insights for performance optimization and reliability.
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary: Delivered the Ftrace Scheduling Group Tracking feature by introducing the sched_group_tracker event in Perfetto. This includes updates to proto definitions and C++ event descriptors, enabling enhanced tracing of scheduling groups and laying groundwork for deeper performance analysis. The work improves root-cause analysis and CPU scheduling visibility, delivering business value through more actionable insights for performance optimization and reliability.
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Quality Metrics
Correctness100.0%
Maintainability80.0%
Architecture100.0%
Performance80.0%
AI Usage40.0%
Skills & Technologies
Programming Languages
C++ProtoBufSQL
Technical Skills
AndroidC++ developmentLinuxdata processingperformance tracingprotobufprotocol buffer designsystem programming
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