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Norman Maurer 3a731041b4 [#3654] Synchronize on PoolSubpage head when allocate / free PoolSubpages 
Motivation:

Currently we hold a lock on the PoolArena when we allocate / free PoolSubpages, which is wasteful as this also affects "normal" allocations. The same is true vice-verse.

Modifications:

Ensure we synchronize on the head of the PoolSubPages pool. This is done per size and so it is possible to concurrently allocate / deallocate PoolSubPages with different sizes, and also normal allocations.

Result:

Less condition and so faster allocation/deallocation.

Before this commit:
xxx:~/wrk $ ./wrk -H 'Connection: keep-alive' -d 120 -c 256 -t 16 -s scripts/pipeline-many.lua  http://xxx:8080/plaintext
Running 2m test @ http://xxx:8080/plaintext
  16 threads and 256 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    17.61ms   29.52ms 689.73ms   97.27%
    Req/Sec   278.93k    41.97k  351.04k    84.83%
  530527460 requests in 2.00m, 71.64GB read
Requests/sec: 4422226.13
Transfer/sec:    611.52MB

After this commit:
xxx:~/wrk $ ./wrk -H 'Connection: keep-alive' -d 120 -c 256 -t 16 -s scripts/pipeline-many.lua  http://xxx:8080/plaintext
Running 2m test @ http://xxx:8080/plaintext
  16 threads and 256 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    15.85ms   24.50ms 681.61ms   97.42%
    Req/Sec   287.14k    38.39k  360.33k    85.88%
  547902773 requests in 2.00m, 73.99GB read
Requests/sec: 4567066.11
Transfer/sec:    631.55MB

This is reproducable every time.
2015-05-27 10:33:37 +02:00
all [maven-release-plugin] prepare for next development iteration 2015-03-03 08:30:59 -05:00
buffer [#3654] Synchronize on PoolSubpage head when allocate / free PoolSubpages 2015-05-27 10:33:37 +02:00
codec Remove memory copy when extract frame in LengthFieldBasedFrameDecoder 2015-04-29 08:43:21 +02:00
codec-dns Fix missing ResourceLeak.close() in AbstractDnsMessage 2015-05-04 12:07:59 +09:00
codec-haproxy ByteString introduced as AsciiString super class 2015-04-15 10:45:18 -07:00
codec-http Support empty http responses when using compression 2015-05-26 09:36:00 +02:00
codec-http2 Update HTTP/2 to RFCs 2015-05-26 16:08:26 -07:00
codec-memcache Returns after encoding each message not do check following instance types 2015-03-19 20:43:10 +01:00
codec-mqtt [maven-release-plugin] prepare for next development iteration 2015-03-03 08:30:59 -05:00
codec-socks [maven-release-plugin] prepare for next development iteration 2015-03-03 08:30:59 -05:00
codec-stomp ByteString introduced as AsciiString super class 2015-04-15 10:45:18 -07:00
codec-xml [maven-release-plugin] prepare for next development iteration 2015-03-03 08:30:59 -05:00
common [#3805] Fix incorrect javadoc in PlatformDependent 2015-05-25 21:42:45 +02:00
example SCTP echo client/server multi-homing examples 2015-05-22 22:23:48 +02:00
handler Consistent use of SSLHandshakeException for ALPN 2015-05-26 16:11:25 -07:00
handler-proxy ByteString introduced as AsciiString super class 2015-04-15 10:45:18 -07:00
license Integrate non-blocking XML parser as Netty codec (#2806) 2015-02-19 14:17:17 +01:00
microbench Have Http2LocalFlowController.consumeBytes indicate whether a WINDOW_UPDATE was written 2015-05-04 13:21:53 -07:00
resolver Use InetSocketAddress.getHostName() instead of getHostString() 2015-03-10 11:45:56 +09:00
resolver-dns Revamp DNS codec 2015-05-01 11:34:52 +09:00
tarball [maven-release-plugin] prepare for next development iteration 2015-03-03 08:30:59 -05:00
testsuite Fix compile error introduced by cherry-pick edf1eb10d5 2015-05-07 18:43:12 +02:00
testsuite-osgi Upgrade twitter hpack dependency 2015-04-30 17:14:33 -07:00
transport Not try to write more then Integer.MAX_VALUE / SSIZE_MAX via writev 2015-05-21 12:02:44 +02:00
transport-native-epoll Not try to write more then Integer.MAX_VALUE / SSIZE_MAX via writev 2015-05-21 12:02:44 +02:00
transport-rxtx [maven-release-plugin] prepare for next development iteration 2015-03-03 08:30:59 -05:00
transport-sctp Add support for SCTP 'unordered' flag. 2015-04-30 08:46:34 +02:00
transport-udt Remove duplicated code in AcceptorChannel classes. 2015-05-07 06:32:13 +02:00
.fbprefs Updated Find Bugs configuration 2009-03-04 10:33:09 +00:00
.gitignore Exclude bin directory from git Motivation: 2014-08-27 06:33:22 +02:00
.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 13:17:58 +09:00
LICENSE.txt Relicensed to Apache License v2 2009-08-28 07:15:49 +00:00
NOTICE.txt Integrate non-blocking XML parser as Netty codec (#2806) 2015-02-19 14:17:17 +01:00
pom.xml Upgrading Jetty alpn-api version 2015-05-22 13:12:31 -07:00
README.md Add a link to the 'native transports' page 2014-07-21 12:10:16 -07:00
run-example.sh Add HTTP/2 Netty tiles example 2015-05-18 14:17:48 -07:00

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 versions takes place in each branch whose name is identical to <majorVersion>.<minorVersion>. For example, the development of 3.9 and 4.0 resides in the branch '3.9' and the branch '4.0' respectively.