ccca9c9cc0
Mutator goroutines that allocate memory during the concurrent mark phase are required to spend some time assisting the garbage collector. The magnitude of this mandatory assistance is proportional to the goroutine's allocation debt and subject to the assistance ratio as calculated by the pacer. When assisting the garbage collector, a mutator goroutine will go beyond paying off its allocation debt. It will build up extra credit to amortize the overhead of the assist. In fast-allocating applications with high assist ratios, building up this credit can take the affected goroutine's entire time slice. Reduce the penalty on each goroutine being selected to assist the GC in two ways, to spread the responsibility more evenly. First, do a consistent amount of extra scan work without regard for the pacer's assistance ratio. Second, reduce the magnitude of the extra scan work so it can be completed within a few hundred microseconds. Commentary on gcOverAssistWork is by Austin Clements, originally in https://golang.org/cl/24704 Updates #14812 Fixes #16432 Change-Id: I436f899e778c20daa314f3e9f0e2a1bbd53b43e1 Reviewed-on: https://go-review.googlesource.com/25155 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Austin Clements <austin@google.com> Reviewed-by: Rick Hudson <rlh@golang.org> Reviewed-by: Chris Broadfoot <cbro@golang.org> |
||
|---|---|---|
| .github | ||
| api | ||
| doc | ||
| lib/time | ||
| misc | ||
| src | ||
| test | ||
| .gitattributes | ||
| .gitignore | ||
| AUTHORS | ||
| CONTRIBUTING.md | ||
| CONTRIBUTORS | ||
| favicon.ico | ||
| LICENSE | ||
| PATENTS | ||
| README.md | ||
| robots.txt | ||
The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
For documentation about how to install and use Go, visit https://golang.org/ or load doc/install-source.html in your web browser.
Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.
Go is the work of hundreds of contributors. We appreciate your help!
To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html
Note that we do not accept pull requests and that we use the issue tracker for bug reports and proposals only. Please ask questions on https://forum.golangbridge.org or https://groups.google.com/forum/#!forum/golang-nuts.
Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.
--
Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set the environment variable $GOROOT to the full path of the go directory (the one containing this file). You can omit the variable if you unpack it into /usr/local/go, or if you rebuild from sources by running all.bash (see doc/install-source.html). You should also add the Go binary directory $GOROOT/bin to your shell's path.
For example, if you extracted the tar file into $HOME/go, you might put the following in your .profile:
export GOROOT=$HOME/go
export PATH=$PATH:$GOROOT/bin
See https://golang.org/doc/install or doc/install.html for more details.