Mercurial > hg > graal-compiler
annotate src/cpu/x86/vm/dump_x86_32.cpp @ 2368:dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
6627787: CMS: JVM refuses to start up with -Xms16m -Xmx16m
7000125: CMS: Anti-monotone young gen sizing with respect to maximum whole heap size specification
7027529: CMS: retire CMSUseOldDefaults flag
Summary: Simplify CMS heap sizing code, relying on ergonomic initial sizing consistent with other collectors for the most part, controlling only young gen sizing to rein in pause times. Make CMS young gen sizing default statically cpu-dependant. Remove inconsistencies wrt generation sizing and policy code, allowing for the fixing for 6627787 and 7000125. For 7027529, retire the flag CMSUseOldDefaults which had been introduced as a bridge from JDK 5 to JDK 6 a number of years ago.
Reviewed-by: brutisso, poonam
| author | ysr |
|---|---|
| date | Wed, 16 Mar 2011 10:37:08 -0700 |
| parents | f95d63e2154a |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "assembler_x86.inline.hpp" | |
| 27 #include "memory/compactingPermGenGen.hpp" | |
| 28 #include "memory/generation.inline.hpp" | |
| 29 #include "memory/space.inline.hpp" | |
| 0 | 30 |
| 31 | |
| 32 | |
| 33 // Generate the self-patching vtable method: | |
| 34 // | |
| 35 // This method will be called (as any other Klass virtual method) with | |
| 36 // the Klass itself as the first argument. Example: | |
| 37 // | |
| 38 // oop obj; | |
| 39 // int size = obj->klass()->klass_part()->oop_size(this); | |
| 40 // | |
| 41 // for which the virtual method call is Klass::oop_size(); | |
| 42 // | |
| 43 // The dummy method is called with the Klass object as the first | |
| 44 // operand, and an object as the second argument. | |
| 45 // | |
| 46 | |
| 47 //===================================================================== | |
| 48 | |
| 49 // All of the dummy methods in the vtable are essentially identical, | |
| 50 // differing only by an ordinal constant, and they bear no releationship | |
| 51 // to the original method which the caller intended. Also, there needs | |
| 52 // to be 'vtbl_list_size' instances of the vtable in order to | |
| 53 // differentiate between the 'vtable_list_size' original Klass objects. | |
| 54 | |
| 55 #define __ masm-> | |
| 56 | |
| 57 void CompactingPermGenGen::generate_vtable_methods(void** vtbl_list, | |
| 58 void** vtable, | |
| 59 char** md_top, | |
| 60 char* md_end, | |
| 61 char** mc_top, | |
| 62 char* mc_end) { | |
| 63 | |
| 64 intptr_t vtable_bytes = (num_virtuals * vtbl_list_size) * sizeof(void*); | |
| 65 *(intptr_t *)(*md_top) = vtable_bytes; | |
| 66 *md_top += sizeof(intptr_t); | |
| 67 void** dummy_vtable = (void**)*md_top; | |
| 68 *vtable = dummy_vtable; | |
| 69 *md_top += vtable_bytes; | |
| 70 | |
| 71 // Get ready to generate dummy methods. | |
| 72 | |
| 73 CodeBuffer cb((unsigned char*)*mc_top, mc_end - *mc_top); | |
| 74 MacroAssembler* masm = new MacroAssembler(&cb); | |
| 75 | |
| 76 Label common_code; | |
| 77 for (int i = 0; i < vtbl_list_size; ++i) { | |
| 78 for (int j = 0; j < num_virtuals; ++j) { | |
| 79 dummy_vtable[num_virtuals * i + j] = (void*)masm->pc(); | |
| 80 | |
| 81 // Load rax, with a value indicating vtable/offset pair. | |
| 82 // -- bits[ 7..0] (8 bits) which virtual method in table? | |
| 83 // -- bits[12..8] (5 bits) which virtual method table? | |
| 84 // -- must fit in 13-bit instruction immediate field. | |
| 85 __ movl(rax, (i << 8) + j); | |
| 86 __ jmp(common_code); | |
| 87 } | |
| 88 } | |
| 89 | |
| 90 __ bind(common_code); | |
| 91 | |
| 92 #ifdef WIN32 | |
| 93 // Expecting to be called with "thiscall" conventions -- the arguments | |
| 94 // are on the stack, except that the "this" pointer is in rcx. | |
| 95 #else | |
| 96 // Expecting to be called with Unix conventions -- the arguments | |
| 97 // are on the stack, including the "this" pointer. | |
| 98 #endif | |
| 99 | |
| 100 // In addition, rax was set (above) to the offset of the method in the | |
| 101 // table. | |
| 102 | |
| 103 #ifdef WIN32 | |
| 304 | 104 __ push(rcx); // save "this" |
| 0 | 105 #endif |
| 304 | 106 __ mov(rcx, rax); |
| 107 __ shrptr(rcx, 8); // isolate vtable identifier. | |
| 108 __ shlptr(rcx, LogBytesPerWord); | |
| 0 | 109 Address index(noreg, rcx, Address::times_1); |
| 110 ExternalAddress vtbl((address)vtbl_list); | |
| 111 __ movptr(rdx, ArrayAddress(vtbl, index)); // get correct vtable address. | |
| 112 #ifdef WIN32 | |
| 304 | 113 __ pop(rcx); // restore "this" |
| 0 | 114 #else |
| 304 | 115 __ movptr(rcx, Address(rsp, BytesPerWord)); // fetch "this" |
| 0 | 116 #endif |
| 304 | 117 __ movptr(Address(rcx, 0), rdx); // update vtable pointer. |
| 0 | 118 |
| 304 | 119 __ andptr(rax, 0x00ff); // isolate vtable method index |
| 120 __ shlptr(rax, LogBytesPerWord); | |
| 121 __ addptr(rax, rdx); // address of real method pointer. | |
| 0 | 122 __ jmp(Address(rax, 0)); // get real method pointer. |
| 123 | |
| 124 __ flush(); | |
| 125 | |
| 126 *mc_top = (char*)__ pc(); | |
| 127 } |