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VM-Group-Discuss

Memory

  • Heap
    • ConstPool
      • StaticField
        • Direct reference
          • object
        • Reflect
          • ClassObject
          • java.lang.reflect.Field
          • Other
            • GC
            • Relink
            • Reinit
        • eg: http://hllvm.group.iteye.com/group/topic/34986
    • G1@java7u4
      • https://oracleus.activeevents.com/connect/sessionDetail.ww?SESSION_ID=6583
      • http://www.infoq.com/cn/articles/jdk7-garbage-first-collector
        • 特点
          • 并行
            • ScanMark run with other app threads
          • 并发
            • Remark step run in multi threads
            • Clean step run in multi threads
          • 分代
          • 空间整合
            • Multi Regions
            • Region Level Clean
              • Reference set loging linking from other region(write barrier)
          • 可以预测的停顿
            • Clean some regions by its needing time
        • Running
          • Steps
  • Native
    • NIO-directMemory
      • http://hllvm.group.iteye.com/group/topic/35271
    • ByteBuffer.allocateDirect

JavaByteCode

  • Class Static Scope Codes
    • Generate {}
      • 只能作为类加载过程的一部分由JVM直接调用
      • http://hllvm.group.iteye.com/group/topic/35224

JVMDebug

  • 为什么 Java 会 Crash？
    • http://www.linuxeden.com/html/softuse/20120506/123909.html
    • Problems
      • JVM bug
      • Native library bug
      • Java code bug
      • Native memory left NONE
      • Environment effect
        • OOM Killer
    • Crash
      • JVM意外消失
      • crash log
        • core.pid
        • core dump
      • tools
        • jstack/gdb

创建@

2013-09-06

最后修改@

2014-01-01

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