google/perfetto
Jul 2025 – Sep 2025
3 Months active
Languages Used
C++Pythonprotobuf
Technical Skills
Embedded SystemsKernel DevelopmentProtocol BuffersSystem TracingPerformance AnalysisSystem Programming
T.J. Mercier
PROFILE
T.j. Mercier
Worked on the google/perfetto repository to enhance memory observability and profiling within Android kernels by developing features for DMA buffer memory usage tracking. Over three months, delivered a new trace event for dmabuf_rss_stat, integrated Protocol Buffers for trace data, and extended the tracing pipeline to support detailed memory statistics per process. Added a dedicated UI track for visualizing dmabuf memory metrics and implemented configuration options to enable per-process RSS collection, leveraging C++ and Python for system programming and trace processing. These contributions improved memory debugging, performance analysis, and provided deeper insight into memory usage patterns across Android workloads.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
3Total
Bugs
0
Commits
3
Features
3
Lines of code
133
Activity Months3
Your Network
248 peopleShared Repositories
248
Work History
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 – google/perfetto monthly summary. Key delivery: a new feature to collect dmabuf RSS for per-process statistics, enabling better visibility into direct memory buffers used by processes. This includes a new configuration option to enable collection and an enhancement to the process statistics data source to read /proc/pid/dmabuf_rss. Availability is kernel dependent (supported on some Android kernels, not in upstream Linux). This work enhances memory profiling capabilities, supports targeted debugging of memory pressure in Android deployments, and lays groundwork for deeper cross-kernel compatibility. The work is associated with commit 9b7fade65c9963520c2c6c1ec2094d6d73212d3a (tprobes: collect dmabuf RSS with process stats (#2740)).
1 Commits • 1 Features
Sep 1, 2025September 2025 – google/perfetto monthly summary. Key delivery: a new feature to collect dmabuf RSS for per-process statistics, enabling better visibility into direct memory buffers used by processes. This includes a new configuration option to enable collection and an enhancement to the process statistics data source to read /proc/pid/dmabuf_rss. Availability is kernel dependent (supported on some Android kernels, not in upstream Linux). This work enhances memory profiling capabilities, supports targeted debugging of memory pressure in Android deployments, and lays groundwork for deeper cross-kernel compatibility. The work is associated with commit 9b7fade65c9963520c2c6c1ec2094d6d73212d3a (tprobes: collect dmabuf RSS with process stats (#2740)).
September 2025
August 2025
1 Commits • 1 Features
Aug 1, 2025In August 2025, delivered a focused enhancement to memory observability for the google/perfetto repository by introducing a Dmabuf RSS Memory Stat Visualization. This feature adds a dedicated UI track for dmabuf_rss_stat and a trace event (kmem/dmabuf_rss_stat) to capture and visualize dmabuf memory statistics alongside existing memory metrics, enabling proactive monitoring and faster issue diagnosis. Implemented as a single commit that aligns with the project’s traceability and observability goals.
August 2025
1 Commits • 1 Features
Aug 1, 2025In August 2025, delivered a focused enhancement to memory observability for the google/perfetto repository by introducing a Dmabuf RSS Memory Stat Visualization. This feature adds a dedicated UI track for dmabuf_rss_stat and a trace event (kmem/dmabuf_rss_stat) to capture and visualize dmabuf memory statistics alongside existing memory metrics, enabling proactive monitoring and faster issue diagnosis. Implemented as a single commit that aligns with the project’s traceability and observability goals.
July 2025
1 Commits • 1 Features
Jul 1, 2025July 2025 monthly summary for google/perfetto focusing on feature delivery and observability improvements. Delivered a new trace event to observe DMA buffer memory usage per process within the Android GKI kernel (dmabuf_rss_stat). This enhancement includes total referenced memory and deltas, enabling better memory debugging and performance tuning across workloads. Updated proto definitions and event lists to support the new tracing, integrating with Perfetto's tracing pipeline for improved observability. No major bugs fixed this month; work concentrated on feature delivery and infrastructure for observability, setting the stage for data-driven memory optimization.
1 Commits • 1 Features
Jul 1, 2025July 2025 monthly summary for google/perfetto focusing on feature delivery and observability improvements. Delivered a new trace event to observe DMA buffer memory usage per process within the Android GKI kernel (dmabuf_rss_stat). This enhancement includes total referenced memory and deltas, enabling better memory debugging and performance tuning across workloads. Updated proto definitions and event lists to support the new tracing, integrating with Perfetto's tracing pipeline for improved observability. No major bugs fixed this month; work concentrated on feature delivery and infrastructure for observability, setting the stage for data-driven memory optimization.
July 2025
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Quality Metrics
Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance93.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++Pythonprotobuf
Technical Skills
Embedded SystemsKernel DevelopmentLinux Kernel InternalsPerformance AnalysisProtocol BuffersSystem ProgrammingSystem TracingTrace Processing
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