5380b22991
This implements the unconditional version of the hybrid deletion write barrier, which always shades both the old and new pointer. It's unconditional for now because barriers on channel operations require checking both the source and destination stacks and we don't have a way to funnel this information into the write barrier at the moment. As part of this change, we modify the typed memclr operations introduced earlier to invoke the write barrier. This has basically no overall effect on benchmark performance. This is good, since it indicates that neither the extra shade nor the new bulk clear barriers have much effect. It also has little effect on latency. This is expected, since we haven't yet modified mark termination to take advantage of the hybrid barrier. Updates #17503. Change-Id: Iebedf84af2f0e857bd5d3a2d525f760b5cf7224b Reviewed-on: https://go-review.googlesource.com/31765 Reviewed-by: Rick Hudson <rlh@golang.org> |
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README.md
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
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Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.
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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.