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runtime: update gctrace docs and print lastStackScan instead of max

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This change updates the gctrace docs to include stacks and globals in
the format line, and prints lastStackScan for "# MB stacks" instead of
maxStackScan, which is more accurate.

Fixes #54649.

Change-Id: Ibff2c390c9c9bf2b24b5b4e98ca346cc98d7cb2e
Reviewed-on: https://go-review.googlesource.com/c/go/+/425366
Run-TryBot: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
This commit is contained in:
Michael Anthony Knyszek 2022-08-24 20:52:51 +00:00 committed by Gopher Robot
parent f64f12f0b3
commit 56bdf7f7d9
2 changed files with 2 additions and 2 deletions
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2
src/runtime/extern.go
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@ -79,7 +79,7 @@ It is a comma-separated list of name=val pairs setting these named variables:
error at each collection, summarizing the amount of memory collected and the
length of the pause. The format of this line is subject to change.
Currently, it is:
gc # @#s #%: #+#+# ms clock, #+#/#/#+# ms cpu, #->#-># MB, # MB goal, # P
gc # @#s #%: #+#+# ms clock, #+#/#/#+# ms cpu, #->#-># MB, # MB goal, # MB stacks, #MB globals, # P
where the fields are as follows:
gc # the GC number, incremented at each GC
@#s time in seconds since program start

2
src/runtime/mgc.go
View File

@ -1120,7 +1120,7 @@ func gcMarkTermination() {
print(" ms cpu, ",
work.heap0>>20, "->", work.heap1>>20, "->", work.heap2>>20, " MB, ",
gcController.lastHeapGoal>>20, " MB goal, ",
gcController.maxStackScan.Load()>>20, " MB stacks, ",
gcController.lastStackScan.Load()>>20, " MB stacks, ",
gcController.globalsScan.Load()>>20, " MB globals, ",
work.maxprocs, " P")
if work.userForced {