tree 7dc35d0f9cfbc84f054c7f0e9ccd71cf1c15d804
parent 956612442fe159ff739af43d61f0cb6900d97070
author Eli Lipsitz <elipsitz@pigweed.infra.roller.google.com> 1674001883 +0000
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1674001883 +0000

[roll third_party/pigweed] pw_build: Add --write-trace option to pw-wrap-ninja

This commit adds a new option to pw-wrap-ninja to write a trace file for
the build, in the Chromium trace_event format. This trace can be opened
with the Perfetto UI.

This trace only includes timing information from the build, not
dependency information from Ninja or additional compiler output. Thus,
it is simpler than a more comprehensive tool such as Fuchsia's
"ninjatrace". However, it's simple to use and still provides value.

Tested:
  Built Pigweed with pw-wrap-ninja and the --write-trace option.
  Confirmed the trace was viewable with the Perfetto UI.
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/126464

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 01b7bd968623539..54a2e4165e9c998
Roller-URL: https://ci.chromium.org/b/8791675902693187265
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I298a4f64229fa84de4eda5c990bca58ba58e38e1
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/126690
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>