913db7685e
Prior to this CL whenever the GC marking was enabled and a P was looking for work we supplied a G to help the GC do its marking tasks. Once this G finished all the marking available it would release the P to find another available G. In the case where there was no work the P would drop into findrunnable which would execute the mark helper G which would immediately return and the P would drop into findrunnable again repeating the process. Since the P was always given a G to run it never blocks. This CL first checks if the GC mark helper G has available work and if not the P immediately falls through to its blocking logic. Fixes #10901 Change-Id: I94ac9646866ba64b7892af358888bc9950de23b5 Reviewed-on: https://go-review.googlesource.com/10189 Reviewed-by: Austin Clements <austin@google.com> |
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