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8064457: Introduce compressed oops mode disjoint base and improve compressed heap handling

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Introduce compressed oops mode disjoint base and improve compressed heap handling.

Reviewed-by: kvn, coleenp
This commit is contained in:
Goetz Lindenmaier 2015-01-05 12:07:37 -05:00
parent 5b8ee4c102
commit 1c18aef92c
13 changed files with 530 additions and 296 deletions
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19
hotspot/src/share/vm/utilities/globalDefinitions.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -124,9 +124,6 @@ extern int LogBitsPerHeapOop;
extern int BytesPerHeapOop;
extern int BitsPerHeapOop;
// Oop encoding heap max
extern uint64_t OopEncodingHeapMax;
const int BitsPerJavaInteger = 32;
const int BitsPerJavaLong = 64;
const int BitsPerSize_t = size_tSize * BitsPerByte;
@ -195,7 +192,6 @@ inline size_t heap_word_size(size_t byte_size) {
return (byte_size + (HeapWordSize-1)) >> LogHeapWordSize;
}
const size_t K = 1024;
const size_t M = K*K;
const size_t G = M*K;
@ -397,8 +393,17 @@ const int LogKlassAlignment = LogKlassAlignmentInBytes - LogHeapWordSize;
const int KlassAlignmentInBytes = 1 << LogKlassAlignmentInBytes;
const int KlassAlignment = KlassAlignmentInBytes / HeapWordSize;
// Klass encoding metaspace max size
const uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes;
// Maximal size of heap where unscaled compression can be used. Also upper bound
// for heap placement: 4GB.
const uint64_t UnscaledOopHeapMax = (uint64_t(max_juint) + 1);
// Maximal size of heap where compressed oops can be used. Also upper bound for heap
// placement for zero based compression algorithm: UnscaledOopHeapMax << LogMinObjAlignmentInBytes.
extern uint64_t OopEncodingHeapMax;
// Maximal size of compressed class space. Above this limit compression is not possible.
// Also upper bound for placement of zero based class space. (Class space is further limited
// to be < 3G, see arguments.cpp.)
const uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes;
// Machine dependent stuff