Mercurial > hg > truffle
annotate src/cpu/x86/vm/globals_x86.hpp @ 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 | 182e9624aa42 |
| children | f08d439fab8c |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
2368
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2150
diff
changeset
|
2 * Copyright (c) 2000, 2011, 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1365
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1365
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1365
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef CPU_X86_VM_GLOBALS_X86_HPP |
| 26 #define CPU_X86_VM_GLOBALS_X86_HPP | |
| 27 | |
| 28 #include "utilities/globalDefinitions.hpp" | |
| 29 #include "utilities/macros.hpp" | |
| 30 | |
| 0 | 31 // Sets the default values for platform dependent flags used by the runtime system. |
| 32 // (see globals.hpp) | |
| 33 | |
| 1064 | 34 define_pd_global(bool, ConvertSleepToYield, true); |
| 35 define_pd_global(bool, ShareVtableStubs, true); | |
| 36 define_pd_global(bool, CountInterpCalls, true); | |
| 37 define_pd_global(bool, NeedsDeoptSuspend, false); // only register window machines need this | |
| 0 | 38 |
| 1064 | 39 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks |
| 40 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs past to check cast | |
| 0 | 41 |
| 42 // See 4827828 for this change. There is no globals_core_i486.hpp. I can't | |
| 43 // assign a different value for C2 without touching a number of files. Use | |
| 44 // #ifdef to minimize the change as it's late in Mantis. -- FIXME. | |
| 45 // c1 doesn't have this problem because the fix to 4858033 assures us | |
| 46 // the the vep is aligned at CodeEntryAlignment whereas c2 only aligns | |
| 47 // the uep and the vep doesn't get real alignment but just slops on by | |
| 48 // only assured that the entry instruction meets the 5 byte size requirement. | |
| 49 #ifdef COMPILER2 | |
| 1064 | 50 define_pd_global(intx, CodeEntryAlignment, 32); |
| 0 | 51 #else |
| 1064 | 52 define_pd_global(intx, CodeEntryAlignment, 16); |
| 0 | 53 #endif // COMPILER2 |
| 1365 | 54 define_pd_global(intx, OptoLoopAlignment, 16); |
| 1064 | 55 define_pd_global(intx, InlineFrequencyCount, 100); |
| 56 define_pd_global(intx, InlineSmallCode, 1000); | |
| 0 | 57 |
| 1064 | 58 define_pd_global(intx, StackYellowPages, 2); |
| 59 define_pd_global(intx, StackRedPages, 1); | |
| 0 | 60 #ifdef AMD64 |
| 61 // Very large C++ stack frames using solaris-amd64 optimized builds | |
| 62 // due to lack of optimization caused by C++ compiler bugs | |
| 63 define_pd_global(intx, StackShadowPages, SOLARIS_ONLY(20) NOT_SOLARIS(6) DEBUG_ONLY(+2)); | |
| 64 #else | |
|
2150
182e9624aa42
7012642: G1: JumbleGC002 test aborts with segmentation violation due to uncaught stack overflow
johnc
parents:
1972
diff
changeset
|
65 define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+5)); |
| 0 | 66 #endif // AMD64 |
| 67 | |
| 1064 | 68 define_pd_global(intx, PreInflateSpin, 10); |
| 0 | 69 |
| 70 define_pd_global(bool, RewriteBytecodes, true); | |
| 71 define_pd_global(bool, RewriteFrequentPairs, true); | |
|
1868
3dc12ef8735e
6989297: Integrate additional portability improvements
bobv
parents:
1552
diff
changeset
|
72 |
|
3dc12ef8735e
6989297: Integrate additional portability improvements
bobv
parents:
1552
diff
changeset
|
73 define_pd_global(bool, UseMembar, false); |
| 1972 | 74 |
|
2368
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2150
diff
changeset
|
75 // GC Ergo Flags |
|
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2150
diff
changeset
|
76 define_pd_global(intx, CMSYoungGenPerWorker, 64*M); // default max size of CMS young gen, per GC worker thread |
| 1972 | 77 #endif // CPU_X86_VM_GLOBALS_X86_HPP |