26eac917dc
Currently, findRunnable only considers running a mark worker if there's work in the work queue. In principle, this can delay the start of the desired number of dedicated mark workers if there's no work pending. This is unlikely to occur in practice, since there should be work queued from the scan phase, but if it were to come up, a CPU hog mutator could slow down or delay garbage collection. This check makes sense for fractional mark workers, since they'll just return to the scheduler immediately if there's no work, but we want the scheduler to start all of the dedicated mark workers promptly, even if there's currently no queued work. Hence, this change moves the pending work check after the check for starting a dedicated worker. Change-Id: I52b851cc9e41f508a0955b3f905ca80f109ea101 Reviewed-on: https://go-review.googlesource.com/9298 Reviewed-by: Rick Hudson <rlh@golang.org> |
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