kc3-lang/angle

2023-08-22T22:02:15

Support for link to be entirely parallelized The link job is split as such: - Front-end link - Back-end link - Independent back-end link subtasks (typically native driver compile jobs) - Post-link finalization Each step depends on the previous. These steps are executed as such: 1. Program::link calls into ProgramImpl::link - ProgramImpl::link runs whatever needs the Context, such as releasing resources - ProgramImpl::link returns a LinkTask 2. Program::link implements a closure that calls the front-end link and passes the results to the backend's LinkTask. 3. The LinkTask potentially returns a set of LinkSubTasks to be scheduled by the worker pool 4. Once the link is resolved, the post-link finalization is run In the above, steps 1 and 4 are done under the share group lock. Steps 2 and 3 can be done in threads or without holding the share group lock if the backend supports it. Step 2 is not yet made independent of the Context on some backends, and a frontend feature is used to make that step either run on the main thread or as a worker thread. Bug: angleproject:8297 Change-Id: I12f1e6bbaf365543dfcac969e166e0b5aa622104 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4808191 Reviewed-by: Charlie Lao <cclao@google.com> Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@google.com> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>