The first two articles covered what Perfetto is and how to capture a trace. This third article starts after you open that trace: with so much on the screen, where do you look?

Android documentation labels Systrace a legacy tool and recommends Perfetto on Android 10+. When I wrote this article, Perfetto had largely replaced Systrace in my daily work, and the OPPO and vivo teams I encountered were migrating. This series continues the earlier analysis methods with Perfetto.

Technical review: 2026-10-14. The 2024 interface and case screenshots are retained. Updates to shortcuts and analysis semantics use official documentation and v58.3 source (11fbaed83636). The original case traces are not provided here; their illustrated wake-up chains and measurements are not new-version test results.

The previous article Android Perfetto Series 1: Introduction to Perfetto introduced what Perfetto is. This article provides a brief introduction to Perfetto capture.

Android documentation labels Systrace a legacy tool and recommends Perfetto on Android 10+. When I wrote this article, Perfetto had largely replaced Systrace in my daily work, and the OPPO and vivo teams I encountered were also migrating. This series revisits the earlier analysis methods with Perfetto.

Technical review: 2026-10-14. The main examples target Android 12+. Original 2024 screenshots remain, with older-system and newer-UI differences explained below. Commands and configuration were checked against official documentation and script source; this update adds no new device-capture results.

This is the first article in the Perfetto series. It mainly provides a brief introduction to the Perfetto tool, including its history, development, and what Perfetto can do.

Android documentation labels Systrace a legacy tool and recommends Perfetto on Android 10+. By the time I wrote this article, Perfetto had largely replaced Systrace in my daily work, and the OPPO and vivo teams I encountered were also migrating. Newcomers facing its complex interface asked me to revisit the Systrace articles using Perfetto.

Technical review: 2026-10-14. The original article and screenshots date from 2024. The updates below distinguish Android 10/11/12 data-source requirements and Perfetto v48.0/v49.0 UI changes from that earlier experience. Available data still depends on the device, recording configuration, and tool version.