Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/gc_implementation/concurrentMarkSweep/freeBlockDictionary.cpp@e018e6884bd8 (annotated)
src/share/vm/gc_implementation/concurrentMarkSweep/freeBlockDictionary.cpp
Wed, 23 Dec 2009 09:23:54 -0800
- author
- ysr
- date
- Wed, 23 Dec 2009 09:23:54 -0800
- changeset 1580
- e018e6884bd8
- parent 435
- a61af66fc99e
- child 1907
- c18cbe5936b8
- permissions
- -rw-r--r--
6631166: CMS: better heuristics when combatting fragmentation
Summary: Autonomic per-worker free block cache sizing, tunable coalition policies, fixes to per-size block statistics, retuned gain and bandwidth of some feedback loop filters to allow quicker reactivity to abrupt changes in ambient demand, and other heuristics to reduce fragmentation of the CMS old gen. Also tightened some assertions, including those related to locking.
Reviewed-by: jmasa
| duke@435 | 1 | /* |
| duke@435 | 2 | * Copyright 2002-2004 Sun Microsystems, Inc. All Rights Reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| duke@435 | 21 | * have any questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| duke@435 | 25 | # include "incls/_precompiled.incl" |
| duke@435 | 26 | # include "incls/_freeBlockDictionary.cpp.incl" |
| duke@435 | 27 | |
| duke@435 | 28 | #ifndef PRODUCT |
| duke@435 | 29 | Mutex* FreeBlockDictionary::par_lock() const { |
| duke@435 | 30 | return _lock; |
| duke@435 | 31 | } |
| duke@435 | 32 | |
| duke@435 | 33 | void FreeBlockDictionary::set_par_lock(Mutex* lock) { |
| duke@435 | 34 | _lock = lock; |
| duke@435 | 35 | } |
| duke@435 | 36 | |
| duke@435 | 37 | void FreeBlockDictionary::verify_par_locked() const { |
| duke@435 | 38 | #ifdef ASSERT |
| duke@435 | 39 | if (ParallelGCThreads > 0) { |
| duke@435 | 40 | Thread* myThread = Thread::current(); |
| duke@435 | 41 | if (myThread->is_GC_task_thread()) { |
| duke@435 | 42 | assert(par_lock() != NULL, "Should be using locking?"); |
| duke@435 | 43 | assert_lock_strong(par_lock()); |
| duke@435 | 44 | } |
| duke@435 | 45 | } |
| duke@435 | 46 | #endif // ASSERT |
| duke@435 | 47 | } |
| duke@435 | 48 | #endif |
