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The Go programming language
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ba134539c5
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Russ Cox ba134539c5 runtime: faster entersyscall/exitsyscall 
Replace cas with xadd in scheduler.
Suggested by Dmitriy in last code review.
Verified with Promela model.

When there's actual contention for the atomic word,
this avoids the looping that compare-and-swap requires.

benchmark                            old ns/op    new ns/op    delta
runtime_test.BenchmarkSyscall               32           26  -17.08%
runtime_test.BenchmarkSyscall-2            155           59  -61.81%
runtime_test.BenchmarkSyscall-3            112           52  -52.95%
runtime_test.BenchmarkSyscall-4             94           48  -48.57%
runtime_test.BenchmarkSyscallWork          871          872   +0.11%
runtime_test.BenchmarkSyscallWork-2        481          477   -0.83%
runtime_test.BenchmarkSyscallWork-3        338          335   -0.89%
runtime_test.BenchmarkSyscallWork-4        263          256   -2.66%

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/4800047
2011-07-23 12:22:55 -04:00
doc weekly.2011-07-19 2011-07-20 15:45:55 +10:00
include build: fix header files for Plan 9 2011-06-14 14:14:11 -04:00
lib godoc: implement http.FileSystem for zip files 2011-07-19 08:22:20 -07:00
misc gobuilder: goinstall with -dashboard=false instead of -log=false 2011-07-20 16:07:40 +10:00
src runtime: faster entersyscall/exitsyscall 2011-07-23 12:22:55 -04:00
test runtime: add UpdateMemStats, use in tests 2011-07-22 00:55:01 -04:00
.hgignore go/build: exclude cgo test from arm 2011-06-06 09:25:30 +10:00
.hgtags tag weekly.2011-07-19 2011-07-20 15:48:36 +10:00
AUTHORS A+C: Matthew Horsnell (individual CLA) 2011-07-13 12:33:03 -07:00
CONTRIBUTORS CONTRIBUTORS: add Mike Solomon (Google CLA) 2011-07-20 13:30:46 -07:00
favicon.ico
LICENSE LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README build: update, streamline documentation for new $GOBIN 2010-08-24 20:00:50 -04:00
robots.txt godoc: serve robots.txt raw 2011-02-19 05:46:20 +11:00

README 

This is the source code repository for the Go programming language.  

For documentation about how to install and use Go,
visit http://golang.org/ or load doc/install.html in your web browser.

After installing Go, you can view a nicely formatted
doc/install.html by running godoc --http=:6060
and then visiting http://localhost:6060/doc/install.html.

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 README).  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.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 doc/install.html for more details.