[B! jvm] authorNariのブックマーク

HotspotVMのstack map生成について

nari3 @nari3 HotspotVMのC1でコンパイルされたフレームのGC mapはコンパイル時に一緒に作成されるっぽいなぁ。動かしながら記録するんだと思ったが。コンパイル時に決定するのか。 2012-04-25 23:04:02

authorNari 2012/04/26

stack map, gc map

*gc
jvm

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找出栈上的指针/引用 - Script Ahead, Code Behind - ITeye博客

authorNari 2012/04/25

oop map, GC map

*gc
jvm

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A work in progress, especially as the HotSpot VM evolves. But a place to put definitions of things so we only have to define them once. There are empty entries (marked TBD for "to be defined") because we think of things that we need to define faster than we think of good definitions. adaptive spinning An optimization technique whereby a thread spins waiting for a change-of-state to occur (typicall

authorNari 2012/03/27

用語集

4
jvm

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CompressedOops - HotSpot Internals for OpenJDK - wikis.sun.com

Compressed oops in the Hotspot JVM What's an oop, and why should they be compressed? An "oop", or "ordinary object pointer" in HotSpot parlance is a managed pointer to an object. It is normally the same size as a native machine pointer, which means 64 bits on an LP64 system. On an ILP32 system, there is a maximum heap size of somewhat less than 4Gb, which is not enough for many applications. On an