Google Git
Sign in
flutter / third_party / perfetto / 661b4f34268a7a728989958612e59376af04bafe
commit661b4f34268a7a728989958612e59376af04bafe[log] [tgz]
authorPrimiano Tucci <primiano@google.com>Mon Feb 20 17:01:14 2023 +0000
committerPrimiano Tucci <primiano@google.com>Mon Feb 20 17:01:14 2023 +0000
tree31a911b6105f22d025ce4793032a8a6d3099829f
parent0d180f46481a96cbe8340734fa5cdce3bba636c8 [diff]
traced: add perfer_suspend_clock_for_duration option

By default traced uses CLOCK_MONOTONIC for the duration_ms
timer. That comes all the way down from poll() used by
PostDelayedTask(). In some cases, this is unideal as CLOCK_MONO
isn't suspend-aware. On mobile phones a trace with a 24h duration
might end up lasting weeks if suspend gets in the way, causing
consequent trace losses if the devce is rebooted.
This CL adds an option to use CLOCK_BOOTTIME for duration_ms.
When enabled, it uses PeriodicTask (without the "periodic" bit)
which under the hoods uses timerfd.

Bug: 269589525
Test: manual:
 - Start a config with perfer_suspend_clock_for_duration:true
 - Force the workstation to suspend (echo mem | sudo tee /sys/power/state)
 - Wait for longer than duration_ms
 - Observe that the tracing session is stopped immediately after resume.

Change-Id: Ic05db218596f0a21d7c440eb5b96a56529c8a909
12 files changed
tree: 31a911b6105f22d025ce4793032a8a6d3099829f
  1. .github/
  2. bazel/
  3. build_overrides/
  4. buildtools/
  5. debian/
  6. docs/
  7. examples/
  8. gn/
  9. include/
  10. infra/
  11. protos/
  12. python/
  13. src/
  14. test/
  15. tools/
  16. ui/
  17. .clang-format
  18. .clang-tidy
  19. .git-blame-ignore-revs
  20. .gitattributes
  21. .gitignore
  22. .gn
  23. .style.yapf
  24. Android.bp
  25. Android.bp.extras
  26. BUILD
  27. BUILD.extras
  28. BUILD.gn
  29. CHANGELOG
  30. codereview.settings
  31. DIR_METADATA
  32. heapprofd.rc
  33. LICENSE
  34. meson.build
  35. METADATA
  36. MODULE_LICENSE_APACHE2
  37. OWNERS
  38. perfetto.rc
  39. PerfettoIntegrationTests.xml
  40. PRESUBMIT.py
  41. README.chromium
  42. README.md
  43. TEST_MAPPING
  44. traced_perf.rc
  45. WORKSPACE
README.md

Perfetto - System profiling, app tracing and trace analysis

Perfetto is a production-grade open-source stack for performance instrumentation and trace analysis. It offers services and libraries and for recording system-level and app-level traces, native + java heap profiling, a library for analyzing traces using SQL and a web-based UI to visualize and explore multi-GB traces.

See https://perfetto.dev/docs or the /docs/ directory for documentation.