a51905fa04
This moves all of GC initialization, sweep termination, and the transition to concurrent marking in to the off->mark transition function. This means it's now handled on the goroutine that detected the state exit condition. As a result, malloc no longer needs to Gosched() at the beginning of the GC cycle to prevent over-allocation while the GC is starting up because it will now *help* the GC to start up. The Gosched hack is still necessary during GC shutdown (this is easy to test by enabling gctrace and hitting Ctrl-S to block the gctrace output). At this point, the GC coordinator still handles later phases. This requires a small tweak to how we start the GC coordinator. Currently, starting the GC coordinator is best-effort and may fail if the coordinator is about to park from the previous cycle but hasn't yet. We fix this by replacing the park/ready to wake up the coordinator with a semaphore. This is temporary since the coordinator will be going away in a few commits. Updates #11970. Change-Id: I2c6a11c91e72dfbc59c2d8e7c66146dee9a444fe Reviewed-on: https://go-review.googlesource.com/16357 Reviewed-by: Rick Hudson <rlh@golang.org> Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> |
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robots.txt |
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