January 2009 - hotspot-gc-dev

hg: jdk7/hotspot-gc/hotspot: 16 new changesets
by john.coomes＠sun.com 14 Jan '09

14 Jan '09

Changeset: ad8c8ca4ab0f Author: xdono Date: 2008-12-15 16:55 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/ad8c8ca4ab0f 6785258: Update copyright year Summary: Update copyright for files that have been modified starting July 2008 to Dec 2008 Reviewed-by: katleman, ohair, tbell ! src/cpu/x86/vm/vm_version_x86_32.hpp ! src/cpu/x86/vm/vm_version_x86_64.hpp ! src/os/linux/launcher/java.c ! src/os/linux/launcher/java.h ! src/os/linux/launcher/java_md.c ! src/os/linux/vm/globals_linux.hpp ! src/os/solaris/launcher/java.c ! src/os/solaris/launcher/java.h ! src/os/solaris/launcher/java_md.c ! src/os/solaris/vm/globals_solaris.hpp ! src/os/windows/vm/globals_windows.hpp ! src/os/windows/vm/os_windows.hpp ! src/os_cpu/linux_x86/vm/linux_x86_32.ad ! src/share/tools/IdealGraphVisualizer/Data/src/com/sun/hotspot/igv/data/serialization/XMLWriter.java ! src/share/tools/IdealGraphVisualizer/Difference/src/com/sun/hotspot/igv/difference/Difference.java ! src/share/tools/IdealGraphVisualizer/Filter/src/com/sun/hotspot/igv/filter/CustomFilter.java ! src/share/tools/IdealGraphVisualizer/Util/src/com/sun/hotspot/igv/util/PropertiesSheet.java ! src/share/tools/IdealGraphVisualizer/Util/src/com/sun/hotspot/igv/util/RangeSliderModel.java ! src/share/tools/IdealGraphVisualizer/View/src/com/sun/hotspot/igv/view/DiagramViewModel.java ! src/share/vm/adlc/adlparse.cpp ! src/share/vm/adlc/adlparse.hpp ! src/share/vm/adlc/filebuff.cpp ! src/share/vm/adlc/filebuff.hpp ! src/share/vm/adlc/formssel.hpp ! src/share/vm/c1/c1_GraphBuilder.cpp ! src/share/vm/c1/c1_GraphBuilder.hpp ! src/share/vm/c1/c1_IR.cpp ! src/share/vm/c1/c1_ValueMap.hpp ! src/share/vm/ci/ciEnv.cpp ! src/share/vm/ci/ciTypeFlow.cpp ! src/share/vm/classfile/classFileParser.hpp ! src/share/vm/gc_implementation/g1/concurrentMark.cpp ! src/share/vm/gc_implementation/g1/dirtyCardQueue.cpp ! src/share/vm/gc_implementation/g1/g1BlockOffsetTable.cpp ! src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp ! src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp ! src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp ! src/share/vm/gc_implementation/g1/g1MarkSweep.cpp ! src/share/vm/gc_implementation/g1/heapRegion.cpp ! src/share/vm/gc_implementation/g1/heapRegion.hpp ! src/share/vm/gc_implementation/g1/heapRegionSeq.cpp ! src/share/vm/gc_implementation/g1/heapRegionSeq.hpp ! src/share/vm/gc_implementation/g1/ptrQueue.cpp ! src/share/vm/gc_implementation/g1/ptrQueue.hpp ! src/share/vm/gc_implementation/includeDB_gc_g1 ! src/share/vm/gc_implementation/parallelScavenge/pcTasks.hpp ! src/share/vm/gc_implementation/parallelScavenge/psCompactionManager.cpp ! src/share/vm/gc_implementation/parallelScavenge/psCompactionManager.hpp ! src/share/vm/gc_implementation/parallelScavenge/psMarkSweepDecorator.hpp ! src/share/vm/gc_implementation/parallelScavenge/psPermGen.cpp ! src/share/vm/interpreter/bytecodeStream.cpp ! src/share/vm/interpreter/bytecodes.cpp ! src/share/vm/interpreter/bytecodes.hpp ! src/share/vm/memory/referencePolicy.cpp ! src/share/vm/memory/referencePolicy.hpp ! src/share/vm/memory/tenuredGeneration.hpp ! src/share/vm/oops/constantPoolOop.cpp ! src/share/vm/opto/block.hpp ! src/share/vm/opto/phase.cpp ! src/share/vm/opto/phase.hpp ! src/share/vm/prims/jniCheck.cpp ! src/share/vm/prims/jniCheck.hpp ! src/share/vm/prims/jvmtiEnvBase.cpp ! src/share/vm/prims/jvmtiTrace.cpp ! src/share/vm/runtime/javaCalls.cpp ! src/share/vm/runtime/javaCalls.hpp ! src/share/vm/runtime/perfMemory.cpp ! src/share/vm/runtime/perfMemory.hpp ! src/share/vm/runtime/thread.hpp ! src/share/vm/services/threadService.hpp ! src/share/vm/utilities/array.hpp ! src/share/vm/utilities/constantTag.hpp ! src/share/vm/utilities/growableArray.hpp ! src/share/vm/utilities/hashtable.cpp ! src/share/vm/utilities/taskqueue.cpp Changeset: 5e5faba1ac11 Author: xdono Date: 2008-12-18 21:34 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/5e5faba1ac11 Added tag jdk7-b42 for changeset ad8c8ca4ab0f ! .hgtags Changeset: 569b3b226089 Author: trims Date: 2008-12-20 09:57 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/569b3b226089 Merge ! src/share/vm/adlc/adlparse.cpp ! src/share/vm/adlc/adlparse.hpp ! src/share/vm/adlc/filebuff.hpp ! src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp ! src/share/vm/gc_implementation/g1/heapRegionSeq.cpp Changeset: 26bc4770e671 Author: trims Date: 2008-12-20 09:58 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/26bc4770e671 Merge ! src/share/vm/runtime/javaCalls.cpp Changeset: fc6a5ae3fef5 Author: trims Date: 2008-12-20 09:59 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/fc6a5ae3fef5 6787832: Bump Hotspot build number to 08 Summary: Update the HS14 build number to 08 Reviewed-by: jcoomes ! make/hotspot_version Changeset: 3cd5c5b027b1 Author: trims Date: 2008-12-23 19:28 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/3cd5c5b027b1 6788797: Fork HS14 to HS15 - renumber Major and build numbers of JVM Summary: fork Hotspot 15 - redo verisoning numbers Reviewed-by: jcoomes ! make/hotspot_version Changeset: 6d8fc951eb25 Author: kvn Date: 2008-12-22 15:43 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/6d8fc951eb25 6778657: Casts in SharedRuntime::f2i, f2l, d2i and d2l rely on undefined C++ behaviour Summary: Replaces SharedRuntime::f2i et al with versions that should work Reviewed-by: never Contributed-by: gbenson(a)redhat.com ! src/share/vm/runtime/sharedRuntime.cpp + test/compiler/6778657/Test.java Changeset: 9656bebe85a7 Author: kvn Date: 2008-12-22 16:53 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/9656bebe85a7 6778662: fixes 64-bits libraries directory search paths on linux Summary: Fixes 64-bits libraries directory search paths. Reviewed-by: never Contributed-by: langel(a)redhat.com ! src/os/linux/vm/os_linux.cpp Changeset: 1a767c61ad01 Author: never Date: 2009-01-06 16:10 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/1a767c61ad01 Merge Changeset: dabd8d202164 Author: coleenp Date: 2008-12-23 06:16 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/dabd8d202164 4997835: RFE: crash dump will only be created when running w/ -XX:+ShowMessageBoxOnError Summary: Using UseOSErrorReporting will provide both an hs_err file and a crash dump or debug launch and works better. Reviewed-by: xlu, acorn, poonam ! src/share/vm/utilities/vmError.cpp Changeset: db4caa99ef11 Author: xlu Date: 2008-12-24 13:06 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/db4caa99ef11 6787106: Hotspot 32 bit build fails on platforms having different definitions for intptr_t & int32_t Summary: Avoid casting between int32_t and intptr_t specifically for MasmAssembler::movptr in 32 bit platforms. Reviewed-by: jrose, kvn ! src/cpu/x86/vm/assembler_x86.cpp ! src/cpu/x86/vm/c1_LIRAssembler_x86.cpp ! src/cpu/x86/vm/c1_Runtime1_x86.cpp ! src/cpu/x86/vm/interp_masm_x86_32.cpp ! src/cpu/x86/vm/interp_masm_x86_32.hpp ! src/cpu/x86/vm/interpreterRT_x86_32.cpp ! src/cpu/x86/vm/runtime_x86_32.cpp ! src/cpu/x86/vm/sharedRuntime_x86_32.cpp ! src/cpu/x86/vm/stubGenerator_x86_64.cpp ! src/cpu/x86/vm/templateInterpreter_x86_32.cpp ! src/cpu/x86/vm/templateTable_x86_32.cpp ! src/cpu/x86/vm/x86_32.ad ! src/share/vm/utilities/globalDefinitions_gcc.hpp ! src/share/vm/utilities/globalDefinitions_sparcWorks.hpp Changeset: 2328d1d3f8cf Author: xlu Date: 2008-12-24 19:13 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/2328d1d3f8cf 6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2 Summary: Fixed the wrong cast between types since more restrictions are imposed by gcc 4.3.2 Reviewed-by: jcoomes, acorn, phh, never ! src/cpu/sparc/vm/jni_sparc.h ! src/cpu/x86/vm/jni_x86.h ! src/os/linux/vm/os_linux.cpp ! src/share/vm/classfile/javaClasses.cpp ! src/share/vm/libadt/port.hpp ! src/share/vm/oops/constantPoolOop.cpp ! src/share/vm/oops/oopsHierarchy.hpp ! src/share/vm/opto/idealGraphPrinter.cpp ! src/share/vm/prims/jvm.cpp ! src/share/vm/runtime/arguments.cpp ! src/share/vm/runtime/memprofiler.cpp ! src/share/vm/runtime/safepoint.cpp ! src/share/vm/runtime/synchronizer.cpp ! src/share/vm/utilities/globalDefinitions.hpp ! src/share/vm/utilities/ostream.cpp ! src/share/vm/utilities/vmError.hpp Changeset: c81d2ef51ca3 Author: acorn Date: 2009-01-05 13:44 -0500 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/c81d2ef51ca3 4670071: loadClassInternal is too restrictive. Summary: VM support for deadlock fix. Library fix in 4735126. See API proposal. Reviewed-by: dholmes, blacklion ! src/share/vm/classfile/javaClasses.cpp ! src/share/vm/classfile/javaClasses.hpp ! src/share/vm/classfile/systemDictionary.cpp ! src/share/vm/classfile/systemDictionary.hpp ! src/share/vm/classfile/vmSymbols.hpp ! src/share/vm/runtime/globals.hpp Changeset: a0401dc51d0b Author: acorn Date: 2009-01-08 16:27 -0500 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/a0401dc51d0b 6791656: nsk defclass0 asserts handles.hpp Reviewed-by: phh, xlu ! src/share/vm/classfile/systemDictionary.cpp Changeset: fc7ab6287598 Author: coleenp Date: 2009-01-09 14:39 -0500 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/fc7ab6287598 Merge ! src/os/linux/vm/os_linux.cpp ! src/share/vm/oops/constantPoolOop.cpp Changeset: 65de26b5ea82 Author: jcoomes Date: 2009-01-14 14:12 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/65de26b5ea82 Merge ! src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp

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Major GC happening before suggested CMSInitiatingOccupancyFraction
by prashant Kumar 12 Jan '09

12 Jan '09

Hi There, I am using below mentioned options for my server. The issue is that I have set CMSInitiatingOccupancyFraction=65 but major GC is happening at a lower value of heap used (approximately 50%) though it should happen at around 65%. Due to this CPU utilization increases to a very high value. I am not able to find out the reason of major GC. P.S. Logs are attached with the mail. Options: -Xdebug -Xnoagent -debug -Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n,stdalloc=y -Xmx2048m -Xms2048m -XX:NewSize=96m -XX:MaxNewSize=96m -XX:+UseTLAB -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=65 -XX:+DisableExplicitGC -verbose:gc -XX:+PrintGCTimeStamps -XX:+PrintGCDetails -XX:+PrintTenuringDistribution -XX:PrintCMSStatistics=1 -XX:PrintFLSStatistics=1 -XX:+PrintHeapAtGC -XX:PermSize=64m -XX:MaxPermSize=64m This is the output of the logs: Desired survivor size 32768 bytes, new threshold 0 (max 0) : 98176K->0K(98240K), 0.1769591 secs] 1093934K->1003680K(2097088K)Statistics for BinaryTreeDictionary: ------------------------------------ Total Free Space: 252988590 Max Chunk Size: 252988590 Number of Blocks: 1 Av. Block Size: 252988590 Tree Height: 1 Statistics for BinaryTreeDictionary: ------------------------------------ Total Free Space: 0 Max Chunk Size: 0 Number of Blocks: 0 Tree Height: 0 Heap after GC invocations=447: Heap par new generation total 98240K, used 0K [0x75800000, 0x7b800000, 0x7b800000) eden space 98176K, 0% used [0x75800000, 0x75800000, 0x7b7e0000) from space 64K, 0% used [0x7b7f0000, 0x7b7f0000, 0x7b800000) to space 64K, 0% used [0x7b7e0000, 0x7b7e0000, 0x7b7f0000) concurrent mark-sweep generation total 1998848K, used 1003680K [0x7b800000, 0xf5800000, 0xf5800000) concurrent-mark-sweep perm gen total 65536K, used 16879K [0xf5800000, 0xf9800000, 0xf9800000) } , 0.1779375 secs] After GC: After GC: 8784.678: [GC [1 CMS-initial-mark: 1003680K(1998848K)] 1003698K(2097088K), 0.0052064 secs] 8784.684: [CMS-concurrent-mark-start] 8787.045: [CMS-concurrent-mark: 2.361/2.361 secs] (CMS-concurrent-mark yielded 0 times) 8787.046: [CMS-concurrent-preclean-start] (cardTable: 2726 cards, re-scanned 2726 cards, 1 iterations) 8788.370: [CMS-concurrent-preclean: 1.320/1.324 secs] (CMS-concurrent-preclean yielded 0 times) 8788.371: [GC8788.371: [Rescan (parallel) , 0.3424891 secs]8788.714: [weak refs processing, 0.0569442 secs] [1 CMS-remark: 1003680K(1998848K)] 1055351K(2097088K), 0.4066270 secs] 8788.799: [CMS-concurrent-sweep-start] 8791.891: [GC {Heap before GC invocations=447: Heap par new generation total 98240K, used 98176K [0x75800000, 0x7b800000, 0x7b800000) eden space 98176K, 100% used [0x75800000, 0x7b7e0000, 0x7b7e0000) from space 64K, 0% used [0x7b7f0000, 0x7b7f0000, 0x7b800000) to space 64K, 0% used [0x7b7e0000, 0x7b7e0000, 0x7b7f0000) concurrent mark-sweep generation total 1998848K, used 742483K [0x7b800000, 0xf5800000, 0xf5800000) concurrent-mark-sweep perm gen total 65536K, used 16879K [0xf5800000, 0xf9800000, 0xf9800000) Statistics for BinaryTreeDictionary:

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hg: jdk7/hotspot-gc/hotspot: 6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"
by jon.masamitsu＠sun.com 11 Jan '09

11 Jan '09

Changeset: 0af8b0718fc9 Author: jmasa Date: 2009-01-11 16:58 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/0af8b0718fc9 6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark" Summary: The CMS concurrent precleaning and concurrent marking phases should work around classes that are undergoing redefinition. Reviewed-by: ysr, dcubed ! src/share/vm/classfile/classFileParser.cpp ! src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.cpp ! src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp ! src/share/vm/memory/oopFactory.cpp ! src/share/vm/memory/oopFactory.hpp ! src/share/vm/memory/space.cpp ! src/share/vm/oops/constMethodKlass.cpp ! src/share/vm/oops/constMethodKlass.hpp ! src/share/vm/oops/constMethodOop.hpp ! src/share/vm/oops/constantPoolKlass.cpp ! src/share/vm/oops/constantPoolKlass.hpp ! src/share/vm/oops/constantPoolOop.hpp ! src/share/vm/oops/klass.hpp ! src/share/vm/oops/methodOop.cpp ! src/share/vm/oops/methodOop.hpp ! src/share/vm/oops/oop.hpp ! src/share/vm/oops/oop.inline.hpp ! src/share/vm/prims/jvmtiRedefineClasses.cpp

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hg: jdk7/hotspot-gc/hotspot: 6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
by jon.masamitsu＠sun.com 06 Jan '09

06 Jan '09

Changeset: e9be0e04635a Author: jmasa Date: 2009-01-06 07:05 -0800 URL: http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/e9be0e04635a 6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off Summary: Added safe_object_iterate() for use by JMapPerm. Reviewed-by: tonyp ! src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.cpp ! src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp ! src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp ! src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.hpp ! src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp ! src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp ! src/share/vm/gc_interface/collectedHeap.hpp ! src/share/vm/memory/genCollectedHeap.cpp ! src/share/vm/memory/genCollectedHeap.hpp ! src/share/vm/memory/generation.cpp ! src/share/vm/memory/generation.hpp ! src/share/vm/memory/heapInspection.cpp ! src/share/vm/memory/space.cpp ! src/share/vm/memory/space.hpp ! src/share/vm/prims/jvmtiTagMap.cpp ! src/share/vm/services/heapDumper.cpp

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1.6 jdk CMSPermGenSweepingEnbaled
by craig yeldell 05 Jan '09

05 Jan '09

I have run into some PermGen OOM issues, and thought I remember reading that the following args are enabled in the 1.6 jdk. Does anyone know where I can find the info on the default settings? CMSPermGenSweepingEnabled CMSClassUnloadingEnabled 1.6.0_10 64bit Regards, Craig _______________________________________________ hotspot-gc-use mailing list hotspot-gc-use(a)openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/hotspot-gc-use

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