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EmuLabZip 0.4.0: tracing

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@github-actions github-actions released this 23 Oct 23:16
v0.4.0
1b4af3e

Phase 4: tracing.

Added

  • Traces: record what a device did, then find out why it was slow, in one library of recordings.
  • System traces with Perfetto (Android 9+): presets for CPU and scheduling, frames and jank, and memory (with
    native allocations of one app), or your own text configuration. A summary of CPU by process and thread, frame
    percentiles and jank kinds, memory and the busiest slices, and a SQL console (PerfettoSQL).
  • The official trace_processor is downloaded once, after asking, from the Perfetto release; its SHA-256 is pinned
    and checked. It only listens on 127.0.0.1.
  • CPU profiles with simpleperf, for an app or the whole system, drawn as a flame graph (click to zoom, search,
    process and thread pickers, hot functions, folded-stack export).
  • Instruments recordings with xctrace for any template, opened in Instruments, with a flame graph for Time
    Profiler. Needs Developer Mode on the Mac, which EmuLabZip checks first.
  • Open in Perfetto UI through a one-shot local server; the trace is never uploaded.
  • Command line: emulabzip trace record, cpu, instruments, summary, query, open and list.
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