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| author | Austin Clements <austin@google.com> | 2015-08-03 17:45:44 -0400 |
|---|---|---|
| committer | Austin Clements <austin@google.com> | 2015-08-04 18:54:46 +0000 |
| commit | f9dc3382ad8b3ec330b41297053e14dd199d3b5f (patch) | |
| tree | cdbdc33f3219fbc86eb94e1c4b07034b8b9bab21 | |
| parent | fc9ca85f4c4d38ee60b92f79544274c6019e8c5b (diff) | |
| download | go-f9dc3382ad8b3ec330b41297053e14dd199d3b5f.tar.gz go-f9dc3382ad8b3ec330b41297053e14dd199d3b5f.zip | |
runtime: when gcpacertrace > 0, print information about assist ratio
This was useful in debugging the mutator assist behavior for #11911,
and it fits with the other gcpacertrace output.
Change-Id: I1e25590bb4098223a160de796578bd11086309c7
Reviewed-on: https://go-review.googlesource.com/13046
Reviewed-by: Rick Hudson <rlh@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
| -rw-r--r-- | src/runtime/mgc.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/runtime/mgc.go b/src/runtime/mgc.go index c50d68e432..b1fbdc91bb 100644 --- a/src/runtime/mgc.go +++ b/src/runtime/mgc.go @@ -441,6 +441,15 @@ func (c *gcControllerState) startCycle() { // throughout the cycle. c.revise() + if debug.gcpacertrace > 0 { + print("pacer: assist ratio=", c.assistRatio, + " (scan ", memstats.heap_scan>>20, " MB in ", + work.initialHeapLive>>20, "->", + c.heapGoal>>20, " MB)", + " workers=", c.dedicatedMarkWorkersNeeded, + "+", c.fractionalMarkWorkersNeeded, "\n") + } + // Set up a timer to revise periodically c.reviseTimer.f = func(interface{}, uintptr) { gcController.revise() |