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runtime: remove pointless harvestwbufs

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Currently we harvestwbufs the moment we enter the mark phase, even
before starting the world again. Since cached wbufs are only filled
when we're in mark or mark termination, they should all be empty at
this point, making the harvest pointless. Remove the harvest.

We should, but do not currently harvest at the end of the mark phase
when we're running out of work to do.

Change-Id: I5f4ba874f14dd915b8dfbc4ee5bb526eecc2c0b4
Reviewed-on: https://go-review.googlesource.com/7669
Reviewed-by: Rick Hudson <rlh@golang.org>
This commit is contained in:
Austin Clements 2015-03-17 15:28:57 -04:00
parent a681c3029d
commit d21cef1f8f
1 changed files with 0 additions and 1 deletions
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1
src/runtime/mgc.go
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@ -336,7 +336,6 @@ func gc(mode int) {
// Sync.
stoptheworld()
gcphase = _GCmark
harvestwbufs()
// Concurrent mark.
starttheworld()