57afa76471
This adds forEachP, which performs a general-purpose ragged global barrier. forEachP takes a callback and invokes it for every P at a GC safe point. Ps that are idle or in a syscall are considered to be at a continuous safe point. forEachP ensures that these Ps do not change state by forcing all syscall Ps into idle and holding the sched.lock. To ensure that Ps do not enter syscall or idle without running the safe-point function, this adds checks for a pending callback every place there is currently a gcwaiting check. We'll use forEachP to replace the STW around enabling the write barrier and to replace the current asynchronous per-M wbuf cache with a cooperatively managed per-P gcWork cache. Change-Id: Ie944f8ce1fead7c79bf271d2f42fcd61a41bb3cc Reviewed-on: https://go-review.googlesource.com/8206 Reviewed-by: Russ Cox <rsc@golang.org> Reviewed-by: Rick Hudson <rlh@golang.org> |
||
|---|---|---|
| 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.
Please report issues here: https://golang.org/issue/new
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
Please note that we do not use pull requests.
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.