imported>InternetArchiveBot：补救10个来源，并将0个来源标记为失效。) #IABot (v2.0.8

2021-02-07T02:39:57Z

补救10个来源，并将0个来源标记为失效。) #IABot (v2.0.8

新页面

{{NoteTA|G1=IT}}
{{Infobox software
| name = JRockit
| logo =
| screenshot =
| caption =
| collapsible =
| developer =
| latest release version = JDK 28.2.3
| latest release date = {{Start date and age|2012|04|12|df=yes}}
| latest preview version =
| latest preview date = 
| operating system =
| programming language = [[C语言|C]]和[[Java]]
| genre = [[Java虚拟机]]
| license = [[专有软件|专有]]
| website = https://web.archive.org/web/20100414003427/http://www.oracle.com/technology/products/jrockit/index.html
}}
'''JRockit'''是一个[[专有软件|专有]][[Java虚拟机]]（JVM），最初是由{{tsl|en|Appeal Virtual Machines}}开发的，2002年被[[BEA Systems]]收购<ref>{{cite news
| url = http://www.theserverside.com/news/thread.tss?thread_id=12145
| title = BEA Acquires Appeal Virtual Machines, Makers of JRockit
| author = Thomas Risberg
| date = 2002-02-26
| accessdate = 2009-03-04
| publisher = TheServerSide.com
| archive-date = 2016-03-31
| archive-url = https://web.archive.org/web/20160331171146/http://www.theserverside.com/news/thread.tss?thread_id=12145
| dead-url = no
}}</ref>，2007年BEA Systems被[[Oracle]]收购，2008年又成为{{tsl|en|Oracle Fusion Middleware}}的一部分。

在[[JavaOne]]2010大会上，[[Oracle]]宣布JRockit的优秀特性将会在[[OpenJDK]]上实现。<ref>{{cite web
| url=http://blogs.oracle.com/henrik/resource/OOW2010%20-%20JVM%20Strategy.pdf
| title=Java Virtual Machine Strategy
| publisher=[[Oracle Corporation]]
| date=2010-09
| accessdate=2011-05-22
| deadurl=yes
| archiveurl=https://web.archive.org/web/20110601064323/http://blogs.oracle.com/henrik/resource/OOW2010%20-%20JVM%20Strategy.pdf
| archivedate=2011-06-01
}}</ref><ref>{{cite web
| url=http://blogs.oracle.com/henrik/entry/oracles_jvm_strategy
| title=Oracle's JVM Strategy
| publisher=[[Oracle Corporation]]
| author=Henrik Ståhl
| date=2010-11-10
| accessdate=2011-05-22
| deadurl=yes
| archiveurl=https://web.archive.org/web/20110522212229/http://blogs.oracle.com/henrik/entry/oracles_jvm_strategy
| archivedate=2011-05-22
}}</ref>目前，JRockit和[[HotSpot]]正在整合，目标是在JDK 8发布之时发布整合后的代码库。

2011年5月，Oracle宣布JRockit免费发布，并确认他们计划在OpenJDK上移植JRockit的特性。<ref>{{cite web
| url=http://blogs.oracle.com/henrik/entry/jrockit_is_now_free_and
| title=JRockit is Now Free (and Other Java License Updates)
| publisher=[[Oracle Corporation]]
| date=2011-05-18
| accessdate=2011-05-22
| deadurl=yes
| archiveurl=https://web.archive.org/web/20110521142850/http://blogs.oracle.com/henrik/entry/jrockit_is_now_free_and
| archivedate=2011-05-21
}}</ref>

== 性能 ==
JRockiet的许多[[JRE]] {{link-en|.class|Java class file|.class文件}}完全复制自HotSpot。JRockit覆盖了与JVM密切相关的部分{{link-en|.class|Java class file|.class文件}}，因此在提高[[JVM]]性能的同时还保持了[[API]]的兼容性。

Oracle声称<ref>{{cite web
|url = http://download.oracle.com/docs/cd/E15289_01/doc.40/e15058/aboutjrockit.htm
|title = About the Oracle JRockit JDK
|publisher = [[Oracle Corporation]]
|accessdate = 2011-05-22
|archive-url = https://web.archive.org/web/20110919234704/http://download.oracle.com/docs/cd/E15289_01/doc.40/e15058/aboutjrockit.htm
|archive-date = 2011-09-19
|dead-url = yes
}}</ref>使用JRockit虚拟器可以带来显著的性能提升。早期的服务器JVM{{link-en|基准 (计算机)|Benchmark (computing)|基准}}测试往往标明[[HotSpot]]的服务器性能较好，但JRockit有更好的可扩展性。<ref>{{cite web
| url=http://www.volano.org/articles/volano-report-2003-05-30/#htoc5
| title=The Volano Report, May 2003
| date=2003-05-30
| publisher=volano.org
| accessdate=2011-05-22
| archive-date=2020-07-24
| archive-url=https://web.archive.org/web/20200724213214/http://www.volano.org/articles/volano-report-2003-05-30/#htoc5
| dead-url=no
}}</ref>

== 支持的CPU类型 ==
* Intel x86
* Intel x86-64
* Intel Itanium（支持已终止）
* Sun/SPARC

== JRockit Mission Control ==
JRockit5.0 R26版捆绑了一套名为JRockit Mission Control的工具。<ref>{{cite web
| url = http://www.oracle.com/technetwork/middleware/jrockit/overview/missioncontrol-whitepaper-june08-1-130357.pdf
| title = Oracle JRockit Mission Control Overview
| date = June 2008
| accessdate = 2011-05-22
| publisher = [[Oracle Corporation]]
| archive-date = 2017-07-17
| archive-url = https://web.archive.org/web/20170717023141/http://www.oracle.com/technetwork/middleware/jrockit/overview/missioncontrol-whitepaper-june08-1-130357.pdf
| dead-url = no
}}</ref>其中包括：

* 互动式管理控制台，其可视化了[[垃圾回收_(計算機科學)|垃圾回收]]等性能统计数据
* 运行时性能分析工具Runtime Analyzer
* 内存分析工具Memory Leak Detector

从R27.3版<ref>{{cite web
| url = https://blogs.oracle.com/hirt/entry/the_mission_control_30_latency
| title = The Mission Control 3.0 Latency Analyser (Migrated from the old BEA blog)
| date = 2008-08
| author = Marcus Hirt
| accessdate = 2012-07-03
| deadurl = yes
| archiveurl = https://web.archive.org/web/20131213231853/https://blogs.oracle.com/hirt/entry/the_mission_control_30_latency
| archivedate = 2013-12-13
}}</ref>开始，工具套件还包括一个延时分析器，其可视化了[[同步]]、文件/网路 [[I/O]]、内存分配和[[垃圾回收_(計算機科學)|垃圾回收]]造成的[[线程]]停止的统计数据。

== 参考文献 ==
{{Reflist|colwidth=30em}}

== 外部链接 ==
* [https://web.archive.org/web/20100414003427/http://www.oracle.com/technology/products/jrockit/index.html JRockit首页]
* [http://developers.sun.com/learning/javaoneonline/j1sessn.jsp?sessn=TS-2171&yr=2007&track=5 JavaOne 2007 Online BEA JRockit部分]{{Wayback|url=http://developers.sun.com/learning/javaoneonline/j1sessn.jsp?sessn=TS-2171&yr=2007&track=5 |date=20191017181836 }}

{{Java虚拟机}}

{{DEFAULTSORT:Jrockit}}
[[Category:Java虚拟机]]
[[Category:甲骨文公司軟體]]

JRockit - 版本历史

imported>InternetArchiveBot：​补救10个来源，并将0个来源标记为失效。) #IABot (v2.0.8

imported>InternetArchiveBot：补救10个来源，并将0个来源标记为失效。) #IABot (v2.0.8