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Norman Maurer 790c63e8d2 Improve performance of Recycler 
Motivation:

Recycler is used in many places to reduce GC-pressure but is still not as fast as possible because of the internal datastructures used.

Modification:

 - Rewrite Recycler to use a WeakOrderQueue which makes minimal guaranteer about order and visibility for max performance.
 - Recycling of the same object multiple times without acquire it will fail.
 - Introduce a RecyclableMpscLinkedQueueNode which can be used for MpscLinkedQueueNodes that use Recycler

These changes are based on @belliottsmith 's work that was part of #2504.

Result:

Huge increase in performance.

4.0 branch without this commit:

Benchmark                                                (size)   Mode   Samples        Score  Score error    Units
i.n.m.i.RecyclableArrayListBenchmark.recycleSameThread    00000  thrpt        20 116026994.130  2763381.305    ops/s
i.n.m.i.RecyclableArrayListBenchmark.recycleSameThread    00256  thrpt        20 110823170.627  3007221.464    ops/s
i.n.m.i.RecyclableArrayListBenchmark.recycleSameThread    01024  thrpt        20 118290272.413  7143962.304    ops/s
i.n.m.i.RecyclableArrayListBenchmark.recycleSameThread    04096  thrpt        20 120560396.523  6483323.228    ops/s
i.n.m.i.RecyclableArrayListBenchmark.recycleSameThread    16384  thrpt        20 114726607.428  2960013.108    ops/s
i.n.m.i.RecyclableArrayListBenchmark.recycleSameThread    65536  thrpt        20 119385917.899  3172913.684    ops/s
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 297.617 sec - in io.netty.microbench.internal.RecyclableArrayListBenchmark

4.0 branch with this commit:

Benchmark                                                (size)   Mode   Samples        Score  Score error    Units
i.n.m.i.RecyclableArrayListBenchmark.recycleSameThread    00000  thrpt        20 204158855.315  5031432.145    ops/s
i.n.m.i.RecyclableArrayListBenchmark.recycleSameThread    00256  thrpt        20 205179685.861  1934137.841    ops/s
i.n.m.i.RecyclableArrayListBenchmark.recycleSameThread    01024  thrpt        20 209906801.437  8007811.254    ops/s
i.n.m.i.RecyclableArrayListBenchmark.recycleSameThread    04096  thrpt        20 214288320.053  6413126.689    ops/s
i.n.m.i.RecyclableArrayListBenchmark.recycleSameThread    16384  thrpt        20 215940902.649  7837706.133    ops/s
i.n.m.i.RecyclableArrayListBenchmark.recycleSameThread    65536  thrpt        20 211141994.206  5017868.542    ops/s
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 297.648 sec - in io.netty.microbench.internal.RecyclableArrayListBenchmark
2014-06-24 08:09:19 +02:00
all [maven-release-plugin] prepare for next development iteration 2014-06-12 16:20:52 +02:00
buffer MessageToByteEncoder always starts with ByteBuf that use initalCapacity == 0 2014-06-24 13:55:02 +09:00
codec MessageToByteEncoder always starts with ByteBuf that use initalCapacity == 0 2014-06-24 13:55:02 +09:00
codec-http Refactor FastThreadLocal to simplify TLV management 2014-06-19 21:08:16 +09:00
codec-socks [maven-release-plugin] prepare for next development iteration 2014-06-12 16:20:52 +02:00
common Improve performance of Recycler 2014-06-24 08:09:19 +02:00
example Make use of HttpChunkedInput as this will also work when compression is used 2014-06-23 09:38:31 +02:00
handler Refactor FastThreadLocal to simplify TLV management 2014-06-19 21:08:16 +09:00
license Preparation for porting OpenSSL support in 3.10 2014-05-17 20:01:47 +09:00
microbench Fix the inconsistencies between performance tests in ByteBufAllocatorBenchmark 2014-06-21 13:28:11 +09:00
tarball [maven-release-plugin] prepare for next development iteration 2014-06-12 16:20:52 +02:00
testsuite [maven-release-plugin] prepare for next development iteration 2014-06-12 16:20:52 +02:00
transport Improve performance of Recycler 2014-06-24 08:09:19 +02:00
transport-native-epoll Make sure OpenSslEngine is tested against transport-native-epoll 2014-06-21 18:29:00 +09:00
transport-rxtx [maven-release-plugin] prepare for next development iteration 2014-06-12 16:20:52 +02:00
transport-sctp [maven-release-plugin] prepare for next development iteration 2014-06-12 16:20:52 +02:00
transport-udt [maven-release-plugin] prepare for next development iteration 2014-06-12 16:20:52 +02:00
.fbfilter.xml Update license headers 2012-06-04 13:31:44 -07:00
.fbprefs Updated Find Bugs configuration 2009-03-04 10:33:09 +00:00
.gitignore Add JVM crash logs to .gitignore 2014-05-18 21:37:12 +09:00
.travis.yml Travis CI branch whitelisting 2013-03-11 09:55:43 +09:00
CONTRIBUTING.md Move the pull request guide to the developer guide 2014-03-12 13:18:14 +09:00
LICENSE.txt Relicensed to Apache License v2 2009-08-28 07:15:49 +00:00
NOTICE.txt Preparation for porting OpenSSL support in 3.10 2014-05-17 20:01:47 +09:00
pom.xml export sun security packages as optional 2014-06-15 20:59:55 +02:00
README.md Update README.md 2014-01-16 14:38:36 +09:00
run-example.sh Use a forked exec-maven-plugin instead of maven-antrun-plugin 2014-05-23 20:06:12 +09:00

README.md

Netty Project

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.

Links

How to build

For the detailed information about building and developing Netty, please visit the developer guide. This page only gives very basic information.

You require the following to build Netty:

Note that this is build-time requirement. JDK 5 (for 3.x) or 6 (for 4.0+) is enough to run your Netty-based application.

Branches to look

The 'master' branch is where the development of the latest major version lives on. The development of all other major versions takes place in each branch whose name is identical to its major version number. For example, the development of 3.x and 4.x resides in the branch '3' and the branch '4' respectively.