November 2008 - hotspot-gc-dev

review request (M) - 6578152: fill_region_with_object
by John Coomes 03 Dec '08

03 Dec '08

6578152: fill_region_with_object has usability and safety issues http://webrev.invokedynamic.info/jcoomes/6578152-fill/ Touches 25 files, but many are trivial changes. Thanks for any comments. -John

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hg: jdk7/hotspot-gc/hotspot: 9 new changesets
by igor.veresov＠sun.com 26 Nov '08

26 Nov '08

Changeset: 316c0b576ea1 Author: xdono Date: 2008-11-20 11:39 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/316c0b576ea1 Added tag jdk7-b40 for changeset 81a0cbe3b284 ! .hgtags Changeset: ab42bab113e0 Author: trims Date: 2008-11-21 16:11 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/ab42bab113e0 Merge - src/share/vm/gc_implementation/concurrentMarkSweep/concurrentGCThread.cpp - src/share/vm/gc_implementation/concurrentMarkSweep/concurrentGCThread.hpp Changeset: f9d938ede196 Author: trims Date: 2008-11-21 16:11 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/f9d938ede196 6775176: Bump HS14 build number to 08 Summary: Update the Hotspot build number to 08 Reviewed-by: jcoomes ! make/hotspot_version Changeset: 2b42b31e7928 Author: coleenp Date: 2008-11-21 08:09 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/2b42b31e7928 6676175: BigApps crash JVM Client VM (build 10.0-b22, mixed mode, sharing) with SIGSEGV (0xb) Summary: Add test for biased locking epoch before walking own thread stack in case of rare race Reviewed-by: phh, never ! src/share/vm/runtime/biasedLocking.cpp Changeset: ba7f9d894282 Author: kamg Date: 2008-11-21 15:10 -0500 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/ba7f9d894282 Merge - src/share/vm/gc_implementation/concurrentMarkSweep/concurrentGCThread.cpp - src/share/vm/gc_implementation/concurrentMarkSweep/concurrentGCThread.hpp Changeset: 171e581e8161 Author: xlu Date: 2008-11-22 00:16 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/171e581e8161 6554406: Change switch UseVMInterruptibleIO default to false (sol) Summary: The default value of UseVMInterruptibleIO is changed to false for JDK 7, but the default isn't changed for JDK 6 and earlier. Reviewed-by: never, acorn, dholmes, kamg, alanb ! src/share/vm/runtime/arguments.cpp ! src/share/vm/runtime/globals.hpp Changeset: b22701a8b88f Author: coleenp Date: 2008-11-24 14:45 -0500 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/b22701a8b88f 6474243: suspicious jvmti code that uses oop unsafely across GC point Summary: oop stored in unsafely in Lscratch noticed by visual inspection will not be updated by GC. Reviewed-by: kamg, never, kvn ! src/cpu/sparc/vm/templateTable_sparc.cpp Changeset: a60eabc24e2c Author: kamg Date: 2008-11-25 15:59 -0500 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/a60eabc24e2c Merge Changeset: 434912c745cf Author: iveresov Date: 2008-11-26 09:24 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/434912c745cf Merge ! src/share/vm/runtime/globals.hpp

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hg: jdk7/hotspot-gc/langtools: 14 new changesets
by john.coomes＠sun.com 24 Nov '08

24 Nov '08

Changeset: 6508d7e812e1 Author: mcimadamore Date: 2008-10-23 17:59 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/6508d7e812e1 6732484: Bound error on wildcard code Summary: Check.checkExtends should cope with captured type-variables Reviewed-by: jjg ! src/share/classes/com/sun/tools/javac/code/Type.java ! src/share/classes/com/sun/tools/javac/comp/Check.java + test/tools/javac/generics/wildcards/T6732484.java Changeset: 4d2d8b6459e1 Author: mcimadamore Date: 2008-10-23 17:59 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/4d2d8b6459e1 6711619: javac doesn't allow access to protected members in intersection types Summary: Accordingly to new accessibility rules all members of intersection types (but private ones) should be accessible Reviewed-by: jjg ! src/share/classes/com/sun/tools/javac/code/Symbol.java ! src/share/classes/com/sun/tools/javac/comp/Attr.java ! src/share/classes/com/sun/tools/javac/comp/Resolve.java ! test/tools/javac/generics/6531090/T6531090b.java + test/tools/javac/generics/6711619/T6711619a.java + test/tools/javac/generics/6711619/T6711619a.out + test/tools/javac/generics/6711619/T6711619b.java + test/tools/javac/generics/6711619/T6711619b.out Changeset: db77bf6adb53 Author: mcimadamore Date: 2008-10-23 18:00 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/db77bf6adb53 6487370: javac incorrectly gives ambiguity warning with override-equivalent abstract inherited methods Summary: Javac should not compare erased return types when checking for ambiguity errors during overload resolution Reviewed-by: jjg ! src/share/classes/com/sun/tools/javac/comp/Resolve.java + test/tools/javac/generics/6487370/T6487370.java Changeset: 433ee48257c0 Author: mcimadamore Date: 2008-10-23 18:10 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/433ee48257c0 6548436: Incorrect inconvertible types error Summary: Types.rewrite quantifiers should cope with captured type-variables properly Reviewed-by: jjg ! src/share/classes/com/sun/tools/javac/code/Types.java + test/tools/javac/cast/6548436/T6548436a.java + test/tools/javac/cast/6548436/T6548436b.java + test/tools/javac/cast/6548436/T6548436c.java + test/tools/javac/cast/6548436/T6548436d.java Changeset: c6e3fc6dda61 Author: mcimadamore Date: 2008-10-23 18:29 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/c6e3fc6dda61 6557954: Inner class type parameters doesn't get substituted when checking type well-formedness Summary: Validator.visitTypeApply should substitute all formal typevars with actual parameters Reviewed-by: jjg ! src/share/classes/com/sun/tools/javac/comp/Check.java + test/tools/javac/generics/T6557954.java Changeset: 5e54a59bcee7 Author: mcimadamore Date: 2008-10-24 12:45 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/5e54a59bcee7 6680106: StackOverFlowError for Cyclic inheritance in TypeParameters with ArrayType Bounds Summary: Javac ends up in an infinite loop while attributing mutually referring array type-parameter bounds Reviewed-by: jjg ! src/share/classes/com/sun/tools/javac/comp/Attr.java + test/tools/javac/generics/typevars/6680106/T6680106.java + test/tools/javac/generics/typevars/6680106/T6680106.out Changeset: a23e1dc02698 Author: mcimadamore Date: 2008-10-24 12:46 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/a23e1dc02698 6746184: javac fails to compile call to public varargs method Summary: javac's resolution process should go through all steps described in JLS 15.12.2.2 Reviewed-by: jjg ! src/share/classes/com/sun/tools/javac/comp/Resolve.java + test/tools/javac/varargs/T6746184.java Changeset: ddd75a295501 Author: mcimadamore Date: 2008-10-24 12:46 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/ddd75a295501 6758789: Some method resolution diagnostic should be improved Summary: Recent work on diagnostics left out some resolution corner cases Reviewed-by: jjg ! src/share/classes/com/sun/tools/javac/api/Formattable.java ! src/share/classes/com/sun/tools/javac/comp/Attr.java ! src/share/classes/com/sun/tools/javac/comp/Resolve.java ! src/share/classes/com/sun/tools/javac/resources/compiler.properties + test/tools/javac/6758789/T6758789a.java + test/tools/javac/6758789/T6758789a.out + test/tools/javac/6758789/T6758789b.java + test/tools/javac/6758789/T6758789b.out ! test/tools/javac/generics/inference/6718364/T6718364.out Changeset: 638d45788c9e Author: mcimadamore Date: 2008-10-24 12:46 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/638d45788c9e 6762569: Javac crashes with AssertionError in Types.containedBy Summary: Types.containedBy should be more liberal with UndetVars Reviewed-by: jjg ! src/share/classes/com/sun/tools/javac/code/Types.java - test/tools/javac/generics/wildcards/6651719/T6651719b.java + test/tools/javac/generics/wildcards/6762569/T6762569a.java + test/tools/javac/generics/wildcards/6762569/T6762569b.java Changeset: 8d7fa40da0eb Author: tbell Date: 2008-10-24 20:47 -0700 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/8d7fa40da0eb Merge - test/tools/javac/generics/wildcards/6651719/T6651719b.java Changeset: 5ebe90e0afff Author: jjg Date: 2008-10-27 14:25 -0700 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/5ebe90e0afff 6764226: ListTest fails on javap output with bad characters Reviewed-by: darcy ! test/tools/javap/ListTest.java Changeset: 4f7b344a1ce0 Author: mcimadamore Date: 2008-10-28 14:05 +0000 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/4f7b344a1ce0 6763518: Impossible to suppress raw-type warnings Summary: Check.validate(Type) should be invoked after -Xlint is augmented in Attr.visitVarDef Reviewed-by: darcy ! src/share/classes/com/sun/tools/javac/comp/Attr.java ! src/share/classes/com/sun/tools/javac/resources/compiler.properties ! test/tools/javac/6304921/T6304921.out + test/tools/javac/warnings/T6763518.java Changeset: 32e309883246 Author: tbell Date: 2008-11-07 11:45 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/32e309883246 Merge Changeset: 82463d00ac70 Author: xdono Date: 2008-11-20 11:39 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/langtools/rev/82463d00ac70 Added tag jdk7-b40 for changeset 32e309883246 ! .hgtags

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hg: jdk7/hotspot-gc/jdk: 12 new changesets
by john.coomes＠sun.com 24 Nov '08

24 Nov '08

Changeset: 64da1f751c0f Author: martin Date: 2008-10-24 20:34 -0700 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jdk/rev/64da1f751c0f 6761678: (ann) SecurityException in AnnotationInvocationHandler.getMemberMethods Summary: Move call to getDeclaredMethods inside doPrivileged Reviewed-by: darcy, mullan Contributed-by: jjb(a)google.com ! src/share/classes/sun/reflect/annotation/AnnotationInvocationHandler.java + test/java/lang/annotation/ParameterAnnotations.java Changeset: 1a324821b463 Author: tbell Date: 2008-10-24 20:47 -0700 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jdk/rev/1a324821b463 Merge Changeset: 76ecb928e83a Author: emcmanus Date: 2008-10-27 14:02 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jdk/rev/76ecb928e83a 6763639: Remove "rawtypes" warnings from JMX code Reviewed-by: dfuchs ! make/netbeans/jmx/build.xml ! src/share/classes/com/sun/jmx/event/LeaseManager.java ! src/share/classes/com/sun/jmx/event/LeaseRenewer.java ! src/share/classes/com/sun/jmx/interceptor/DefaultMBeanServerInterceptor.java ! src/share/classes/com/sun/jmx/mbeanserver/ClassLoaderRepositorySupport.java ! src/share/classes/com/sun/jmx/mbeanserver/ConvertingMethod.java ! src/share/classes/com/sun/jmx/mbeanserver/DefaultMXBeanMappingFactory.java ! src/share/classes/com/sun/jmx/mbeanserver/Introspector.java ! src/share/classes/com/sun/jmx/mbeanserver/JmxMBeanServer.java ! src/share/classes/com/sun/jmx/mbeanserver/MBeanInstantiator.java ! src/share/classes/com/sun/jmx/mbeanserver/MXBeanIntrospector.java ! src/share/classes/com/sun/jmx/mbeanserver/ObjectInputStreamWithLoader.java ! src/share/classes/com/sun/jmx/mbeanserver/SecureClassLoaderRepository.java ! src/share/classes/com/sun/jmx/mbeanserver/Util.java ! src/share/classes/com/sun/jmx/mbeanserver/WeakIdentityHashMap.java ! src/share/classes/com/sun/jmx/remote/internal/ArrayNotificationBuffer.java ! src/share/classes/com/sun/jmx/remote/internal/ClientNotifForwarder.java ! src/share/classes/com/sun/jmx/remote/internal/ProxyInputStream.java ! src/share/classes/com/sun/jmx/remote/internal/ServerNotifForwarder.java ! src/share/classes/com/sun/jmx/remote/internal/Unmarshal.java ! src/share/classes/com/sun/jmx/remote/security/FileLoginModule.java ! src/share/classes/com/sun/jmx/remote/security/JMXPluggableAuthenticator.java ! src/share/classes/com/sun/jmx/remote/security/MBeanServerFileAccessController.java ! src/share/classes/com/sun/jmx/remote/util/ClassLoaderWithRepository.java ! src/share/classes/com/sun/jmx/remote/util/ClassLogger.java ! src/share/classes/com/sun/jmx/remote/util/EnvHelp.java ! src/share/classes/com/sun/jmx/remote/util/EventClientConnection.java ! src/share/classes/com/sun/jmx/remote/util/OrderClassLoaders.java ! src/share/classes/javax/management/AttributeList.java ! src/share/classes/javax/management/DefaultLoaderRepository.java ! src/share/classes/javax/management/JMRuntimeException.java ! src/share/classes/javax/management/JMX.java ! src/share/classes/javax/management/MBeanAttributeInfo.java ! src/share/classes/javax/management/MBeanConstructorInfo.java ! src/share/classes/javax/management/MBeanInfo.java ! src/share/classes/javax/management/MBeanOperationInfo.java ! src/share/classes/javax/management/MBeanServerFactory.java ! src/share/classes/javax/management/MBeanServerInvocationHandler.java ! src/share/classes/javax/management/StandardMBean.java ! src/share/classes/javax/management/event/EventClientDelegate.java ! src/share/classes/javax/management/event/EventSubscriber.java ! src/share/classes/javax/management/loading/DefaultLoaderRepository.java ! src/share/classes/javax/management/loading/MLet.java ! src/share/classes/javax/management/loading/MLetObjectInputStream.java ! src/share/classes/javax/management/modelmbean/DescriptorSupport.java ! src/share/classes/javax/management/modelmbean/ModelMBeanConstructorInfo.java ! src/share/classes/javax/management/modelmbean/RequiredModelMBean.java ! src/share/classes/javax/management/openmbean/ArrayType.java ! src/share/classes/javax/management/openmbean/CompositeDataInvocationHandler.java ! src/share/classes/javax/management/openmbean/CompositeType.java ! src/share/classes/javax/management/openmbean/OpenMBeanAttributeInfoSupport.java ! src/share/classes/javax/management/openmbean/OpenMBeanParameterInfoSupport.java ! src/share/classes/javax/management/openmbean/OpenType.java ! src/share/classes/javax/management/openmbean/SimpleType.java ! src/share/classes/javax/management/openmbean/TabularDataSupport.java ! src/share/classes/javax/management/openmbean/TabularType.java ! src/share/classes/javax/management/relation/MBeanServerNotificationFilter.java ! src/share/classes/javax/management/relation/RelationService.java ! src/share/classes/javax/management/relation/RelationSupport.java ! src/share/classes/javax/management/relation/Role.java ! src/share/classes/javax/management/relation/RoleList.java ! src/share/classes/javax/management/relation/RoleResult.java ! src/share/classes/javax/management/relation/RoleUnresolved.java ! src/share/classes/javax/management/relation/RoleUnresolvedList.java ! src/share/classes/javax/management/remote/JMXConnectorFactory.java ! src/share/classes/javax/management/remote/rmi/NoCallStackClassLoader.java ! src/share/classes/javax/management/remote/rmi/RMIConnection.java ! src/share/classes/javax/management/remote/rmi/RMIConnectionImpl.java ! src/share/classes/javax/management/remote/rmi/RMIConnector.java ! src/share/classes/javax/management/remote/rmi/RMIConnectorServer.java ! src/share/classes/javax/management/remote/rmi/RMIServerImpl.java ! src/share/classes/javax/management/timer/Timer.java Changeset: 98ac3d398ed6 Author: chegar Date: 2008-10-28 16:14 +0000 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jdk/rev/98ac3d398ed6 6756771: com.sun.net.httpserver.HttpServer should handle POSTs larger than 2Gig Summary: update implementation to use long instead of int Reviewed-by: michaelm ! src/share/classes/sun/net/httpserver/ExchangeImpl.java ! src/share/classes/sun/net/httpserver/FixedLengthInputStream.java ! src/share/classes/sun/net/httpserver/Request.java ! src/share/classes/sun/net/httpserver/ServerImpl.java + test/com/sun/net/httpserver/bugs/FixedLengthInputStream.java Changeset: 58e52eb46bd3 Author: emcmanus Date: 2008-10-28 18:21 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jdk/rev/58e52eb46bd3 6763051: MXBean: Incorrect type names for parametrized dealing with arrays (openType) 6713777: developer diagnosability of errors in uncompliant mxbean interfaces Reviewed-by: dfuchs ! src/share/classes/com/sun/jmx/mbeanserver/DefaultMXBeanMappingFactory.java ! src/share/classes/com/sun/jmx/mbeanserver/MXBeanIntrospector.java ! src/share/classes/javax/management/MBeanServerInvocationHandler.java + test/javax/management/mxbean/ExceptionDiagnosisTest.java ! test/javax/management/mxbean/TypeNameTest.java Changeset: 8dcde0b16199 Author: emcmanus Date: 2008-10-30 17:46 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jdk/rev/8dcde0b16199 6252609: Two different default descriptor forms defined for ModelMBeanInfoSupport 6253137: Documentation for NotificationListener's handback parameter is confusing 6368691: javadoc for JMX Descriptors has bugs and is very hard to navigate. 6602699: support for async notification of mbeaninfo update 6759612: [javadoc] EventClient.NOTIFS_LOST has a garbled href to addEventClientListener 6759619: Clarify what EventClient.getEventClientNotificationInfo does 6759622: Clarify what EventClient.getListeners list does Summary: Documentation fixes, plus simple bugfix for 6759619. Reviewed-by: dfuchs ! src/share/classes/javax/management/Descriptor.java ! src/share/classes/javax/management/MBeanInfo.java ! src/share/classes/javax/management/MBeanServer.java ! src/share/classes/javax/management/NotificationListener.java ! src/share/classes/javax/management/event/EventClient.java ! src/share/classes/javax/management/modelmbean/DescriptorSupport.java ! src/share/classes/javax/management/modelmbean/ModelMBeanAttributeInfo.java ! src/share/classes/javax/management/modelmbean/ModelMBeanConstructorInfo.java ! src/share/classes/javax/management/modelmbean/ModelMBeanInfo.java ! src/share/classes/javax/management/modelmbean/ModelMBeanNotificationInfo.java ! src/share/classes/javax/management/modelmbean/ModelMBeanOperationInfo.java ! test/javax/management/eventService/CustomForwarderTest.java ! test/javax/management/mxbean/TypeNameTest.java Changeset: cdfb6f963a60 Author: emcmanus Date: 2008-10-30 18:19 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jdk/rev/cdfb6f963a60 6450848: make it easier to get the ObjectName of a JMX Proxy Summary: Rework proxy javadoc to explain how to do this. Reviewed-by: sjiang ! src/share/classes/javax/management/JMX.java Changeset: 4ff842aee1fd Author: mullan Date: 2008-10-30 17:24 -0400 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jdk/rev/4ff842aee1fd 6764553: com.sun.org.apache.xml.internal.security.utils.IdResolver is not thread safe Reviewed-by: valeriep ! src/share/classes/com/sun/org/apache/xml/internal/security/utils/IdResolver.java Changeset: f246770bcc78 Author: mullan Date: 2008-10-30 17:28 -0400 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jdk/rev/f246770bcc78 Merge Changeset: 8d17cc67a857 Author: emcmanus Date: 2008-10-31 17:34 +0100 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jdk/rev/8d17cc67a857 6766173: Spec should say that createMBean wraps a constructor RuntimeException in a RuntimeMBeanException Summary: JMX spec clarification Reviewed-by: dfuchs ! src/share/classes/javax/management/MBeanServerConnection.java ! src/share/classes/javax/management/namespace/MBeanServerSupport.java ! test/javax/management/MBeanServer/MBeanExceptionTest.java Changeset: 2201dad60231 Author: tbell Date: 2008-11-07 11:45 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jdk/rev/2201dad60231 Merge Changeset: d00c685ae55e Author: xdono Date: 2008-11-20 11:39 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jdk/rev/d00c685ae55e Added tag jdk7-b40 for changeset 2201dad60231 ! .hgtags

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hg: jdk7/hotspot-gc/jaxws: Added tag jdk7-b40 for changeset 70a6ac6dd737
by john.coomes＠sun.com 24 Nov '08

24 Nov '08

Changeset: a8379d24aa03 Author: xdono Date: 2008-11-20 11:39 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jaxws/rev/a8379d24aa03 Added tag jdk7-b40 for changeset 70a6ac6dd737 ! .hgtags

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hg: jdk7/hotspot-gc/jaxp: Added tag jdk7-b40 for changeset 54946f466e2c
by john.coomes＠sun.com 24 Nov '08

24 Nov '08

Changeset: 0758bd3e2852 Author: xdono Date: 2008-11-20 11:39 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/jaxp/rev/0758bd3e2852 Added tag jdk7-b40 for changeset 54946f466e2c ! .hgtags

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hg: jdk7/hotspot-gc/corba: Added tag jdk7-b40 for changeset 184e21992f47
by john.coomes＠sun.com 24 Nov '08

24 Nov '08

Changeset: c90eeda9594e Author: xdono Date: 2008-11-20 11:39 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/corba/rev/c90eeda9594e Added tag jdk7-b40 for changeset 184e21992f47 ! .hgtags

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hg: jdk7/hotspot-gc: Added tag jdk7-b40 for changeset 44be42de6693
by john.coomes＠sun.com 24 Nov '08

24 Nov '08

Changeset: 8c34e4abcb43 Author: xdono Date: 2008-11-20 11:39 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/rev/8c34e4abcb43 Added tag jdk7-b40 for changeset 44be42de6693 ! .hgtags

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hg: jdk7/hotspot-gc/hotspot: 6774607: SIGSEGV or (!is_null(v), "oop value can never be zero") assertion when running with CMS and COOPs
by y.s.ramakrishna＠sun.com 24 Nov '08

24 Nov '08

Changeset: df4305d4c1a1 Author: ysr Date: 2008-11-24 09:53 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/df4305d4c1a1 6774607: SIGSEGV or (!is_null(v),"oop value can never be zero") assertion when running with CMS and COOPs Summary: Use the more permissive set_klass_or_null() and klass_or_null() interfaces in ParNew's workqueue overflow code that manipulates the klass-word. Reviewed-by: coleenp ! src/share/vm/gc_implementation/parNew/parNewGeneration.cpp ! src/share/vm/oops/oop.inline.hpp

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Re: See Par New GC 2 time slower on Sun T5220 than on Sun V440
by Jon Masamitsu 21 Nov '08

21 Nov '08

Just FYI on this mail. We made a guess that the GC time was being dominated by Reference processing. They are using jdk5 and in ParNewGC in jdk5 Reference processing is done serially. Josh was able to make a change in the application to reduce that number of SoftReferences and the problem went away. Josh Wo wrote On 11/18/08 16:49,: >Hi Ramakrishna/Jon, > >I am with www.hotwire.com. I logged a Sun JDK case with Case # 66145049 as when we upgrade our Sun Fire v440 machine (4 cpu) with Sun SPARC-Enterprise-T5220 (showing 64 cpus using prstat) machine. During the load test, we saw our GC become more than 2 times slower than the old machine and see about 10% lower in the throughput. We have kept JVM setting the same but only increase the thread count of Weblogic (10mp1) work manager. > >I am wondering if you have any insight on why this is happening and if there are known issues/workaround. Any advice will be helpful. I have attached the GC output in the zip file. > >nohup-Nov10-11h09-wlviewstart-sjsp01.out is the v440 old machine, where GC is much better >nohup-Nov18-10h11-wlviewstart-sjsp03.out is the T5220 new machine, which is much more powerful but GC appears to be bad and we got worse throughput. > >Here is the java command line used on both machine >Java command line > >-Xms2410m -server -XX:ThreadStackSize=256 -verbose:gc -XX:+PrintGCTimeStamps -XX:+PrintClassHistogram -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection -XX:CMSFullGCsBeforeCompaction=0 -XX:+HandlePromotionFailure -XX:CMSInitiatingOccupancyFraction=68 -XX:+UseCMSInitiatingOccupancyOnly -Dsun.net.spi.nameservice.provider.1="dns,sun" -Dsun.net.spi.nameservice.nameservers=172.28.2.220,172.26.2.220 -Dsun.net.spi.nameservice.domain=stg.hotwire.com -XX:CMSMarkStackSize=32M -XX:CodeCacheMinimumFreeSpace=2M -XX:ReservedCodeCacheSize=64M -Xmx2410m -XX:NewSize=512M -XX:MaxNewSize=512M -XX:MaxTenuringThreshold=6 -XX:SurvivorRatio=5 -XX:TargetSurvivorRatio=80 -XX:MaxPermSize=256M -XX:-DisableExplicitGC -Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.Jdk14Logger -Dhotwire.db.creds=/opt/p4/phoenix/10.11/deploy/stage/hw.db.creds -Dtangosol.coherence.mode=prod -Djava.endorsed.dirs=/opt/p4/3rdparty/apache/xalan/2.7.0hw -XX:CMSMaxAbortablePrecleanTime=1 -XX:+PrintGCDetails -XX:+PrintHeapAtGC -XX:+PrintTenuringDistribution -Djava.awt.headless=true -Dweblogic.client.socket.ConnectTimeout=5 -Dtangosol.coherence.distributed.localstorage=false -Dtangosol.coherence.cacheconfig=/opt/p4/phoenix/10.11/deploy/coherence-cache-config.xml -Dtangosol.coherence.log=jdk -Dtangosol.coherence.log.level=5 -Djavax.xml.transform.TransformerFactory=org.apache.xalan.xsltc.trax.TransformerFactoryImpl -Dweblogic.http.session.maxConcurrentRequest=5 -Dweblogic.management.server=http://swc01:7004 -Dcom.sun.management.jmxremote.port=8004 -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dtangosol.coherence.management.remote=true -Dweblogic.Name=wlview1 -Dtangosol.coherence.member=wlview1 -Dweblogic.Domain=phoenix -Dweblogic.RootDirectory=/opt/p4/phoenix/10.11/deploy/stage/weblogic -Dwls.home=/opt/p4/3rdparty/bea/weblogic/10.0mp1/server -Dbea.home=/opt/p4/3rdparty/bea/weblogic/10.0mp1 -Dweblogic.connector.ConnectionPoolProfilingEnabled=false -Dcom.bea.wlw.netui.disableInstrumentation=true -D_Offline_FileDataArchive=true > >Thanks, >Josh > > > > >

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