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The Go programming language
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9cbd2fb1aa
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Dmitriy Vyukov 9cbd2fb1aa runtime: remove locks from netpoll hotpaths 
Introduces two-phase goroutine parking mechanism -- prepare to park, commit park.
This mechanism does not require backing mutex to protect wait predicate.
Use it in netpoll. See comment in netpoll.goc for details.
This slightly reduces contention between reader, writer and read/write io notifications;
and just eliminates a bunch of mutex operations from hotpaths, thus making then faster.

benchmark                             old ns/op    new ns/op    delta
BenchmarkTCP4ConcurrentReadWrite           2109         1945   -7.78%
BenchmarkTCP4ConcurrentReadWrite-2         1162         1113   -4.22%
BenchmarkTCP4ConcurrentReadWrite-4          798          755   -5.39%
BenchmarkTCP4ConcurrentReadWrite-8          803          748   -6.85%
BenchmarkTCP4Persistent                    9411         9240   -1.82%
BenchmarkTCP4Persistent-2                  5888         5813   -1.27%
BenchmarkTCP4Persistent-4                  4016         3968   -1.20%
BenchmarkTCP4Persistent-8                  3943         3857   -2.18%

R=golang-codereviews, mikioh.mikioh, gobot, iant, rsc
CC=golang-codereviews, khr
https://golang.org/cl/45700043
2014-01-22 11:27:16 +04:00
api api: update next.txt 2014-01-14 10:18:43 -08:00
doc doc: replace "private" with "unexported" in Effective Go. 2014-01-17 09:06:39 -08:00
include liblink: include missing pragmas for plan9 formatter 2014-01-22 06:23:19 +01:00
lib codereview: switch defaultcc to golang-codereviews 2013-12-20 10:53:50 -05:00
misc misc/cgo/testtls: make test less flaky 2014-01-21 19:44:51 -05:00
src runtime: remove locks from netpoll hotpaths 2014-01-22 11:27:16 +04:00
test cmd/gc: preserve qualified names of unexported methods in imports. 2014-01-21 22:55:50 -05:00
.hgignore .hgignore: remove duplicate entry 2013-12-12 19:01:50 -08:00
.hgtags tag go1.2 2013-12-02 09:06:41 +11:00
AUTHORS A+C: Maxim Khitrov (individual CLA) 2014-01-17 11:26:42 -05:00
CONTRIBUTORS A+C: Maxim Khitrov (individual CLA) 2014-01-17 11:26:42 -05:00
favicon.ico godoc: update favicon 2012-10-11 17:02:36 +11:00
LICENSE doc: update licensing text one more time 2012-03-27 15:09:13 +11:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README README: Fix installation instructions 2013-11-20 13:47:37 -08:00
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-source.html
in your web browser.

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

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.