| commit | 3740768a2f625e7b3310f69bcec47b5dd0898cf1 | [log] [tgz] |
|---|---|---|
| author | ulfjack <ulfjack@google.com> | Tue Sep 17 06:30:49 2019 -0700 |
| committer | Copybara-Service <copybara-worker@google.com> | Tue Sep 17 06:32:57 2019 -0700 |
| tree | 565ff310192248afaaaec80c1f28ae3eee556520 | |
| parent | 365a26bd89587d46e5cd4375dd4b1b7a8a6e878d [diff] |
Avoid all configured targets depending on all build infos Instead, throw a MissingDepException from CachingAnalysisEnvironment if the build info is missing, and restart the analysis of that configured target in the ConfiguredTargetFunction if so. This removes several Skyframe edges per configured target, since most of them never attempt to access the build info. For builds with a few hundred thousand targets, that's several million edges. The build info Skyframe nodes are the currently the nodes with the largest number of reverse deps, which creates a bottleneck in InMemoryNodeEntry.addReverseDepAndCheckIfDone during analysis, causing significant lock contention. In the builds we have looked at, this was the second most common source of lock contention. However, we have not measured any significant reduction in end-to-end build times. There is already an injected key for the build info factories, but it is never actually used, which looks like an incomplete refactoring. This change finishes that refactoring with the nice benefit of removing the build info factories from the SkyframeExecutor (doing so is a prerequisite for allowing multiple concurrent executions in the same SkyframeExecutor). PiperOrigin-RevId: 269555110
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