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The Go programming language
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Keith Randall 3b5278fca6 runtime: get rid of the settype buffer and lock. 
MCaches	now hold a MSpan for each sizeclass which they have
exclusive access to allocate from, so no lock is needed.

Modifying the heap bitmaps also no longer requires a cas.

runtime.free gets more expensive.  But we don't use it
much any more.

It's not much faster on 1 processor, but it's a lot
faster on multiple processors.

benchmark                 old ns/op    new ns/op    delta
BenchmarkSetTypeNoPtr1           24           23   -0.42%
BenchmarkSetTypeNoPtr2           33           34   +0.89%
BenchmarkSetTypePtr1             51           49   -3.72%
BenchmarkSetTypePtr2             55           54   -1.98%

benchmark                old ns/op    new ns/op    delta
BenchmarkAllocation          52739        50770   -3.73%
BenchmarkAllocation-2        33957        34141   +0.54%
BenchmarkAllocation-3        33326        29015  -12.94%
BenchmarkAllocation-4        38105        25795  -32.31%
BenchmarkAllocation-5        68055        24409  -64.13%
BenchmarkAllocation-6        71544        23488  -67.17%
BenchmarkAllocation-7        68374        23041  -66.30%
BenchmarkAllocation-8        70117        20758  -70.40%

LGTM=rsc, dvyukov
R=dvyukov, bradfitz, khr, rsc
CC=golang-codereviews
https://golang.org/cl/46810043
 		2014-02-26 15:52:58 -08:00
api api: update next.txt 2014-02-19 15:56:42 -05:00
doc cmd/go: remove 'go tool benchcmp' and corresponding special case 2014-02-26 13:04:39 +11:00
include include: fix comment in link.h 2014-02-26 07:38:13 -08:00
lib codereview: remove unused upload_options.revision 2014-02-24 10:11:37 -05:00
misc misc/cgo/testso: don't use TLS variables on Darwin and OpenBSD. 2014-02-23 20:37:43 -05:00
src runtime: get rid of the settype buffer and lock. 2014-02-26 15:52:58 -08:00
test cmd/gc: fix bad checknil with ints on 32 bit compilers 2014-02-26 12:25:13 -08:00
.hgignore lib9: enable on Plan 9 2014-02-13 20:06:41 +01:00
.hgtags tag go1.2 2013-12-02 09:06:41 +11:00
AUTHORS A+C: Patrick Mézard (individual CLA) 2014-02-23 12:52:23 -08:00
CONTRIBUTORS A+C: Patrick Mézard (individual CLA) 2014-02-23 12:52:23 -08:00
LICENSE doc: update licensing text one more time 2012-03-27 15:09:13 +11:00
PATENTS
…
README README: Fix installation instructions 2013-11-20 13:47:37 -08:00
favicon.ico godoc: update favicon 2012-10-11 17:02:36 +11:00
robots.txt
…

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.