Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/gc_implementation/g1/concurrentZFThread.hpp@f9ec1e4bbb44 (annotated)
src/share/vm/gc_implementation/g1/concurrentZFThread.hpp
Thu, 15 Apr 2010 18:45:30 -0400
- author
- tonyp
- date
- Thu, 15 Apr 2010 18:45:30 -0400
- changeset 1825
- f9ec1e4bbb44
- parent 1454
- 035d2e036a9b
- child 1907
- c18cbe5936b8
- permissions
- -rw-r--r--
6939027: G1: assertion failure during the concurrent phase of cleanup
Summary: The outgoing region map is not maintained properly and it's causing an assert failure. Given that we don't actually use it, I'm removing it. I'm piggy-backing a small change on this which removes a message that it's printed before a Full GC when DisableExplicitGC is set.
Reviewed-by: apetrusenko, ysr
| ysr@777 | 1 | /* |
| xdono@1279 | 2 | * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved. |
| ysr@777 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| ysr@777 | 4 | * |
| ysr@777 | 5 | * This code is free software; you can redistribute it and/or modify it |
| ysr@777 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| ysr@777 | 7 | * published by the Free Software Foundation. |
| ysr@777 | 8 | * |
| ysr@777 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| ysr@777 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| ysr@777 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| ysr@777 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| ysr@777 | 13 | * accompanied this code). |
| ysr@777 | 14 | * |
| ysr@777 | 15 | * You should have received a copy of the GNU General Public License version |
| ysr@777 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| ysr@777 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| ysr@777 | 18 | * |
| ysr@777 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| ysr@777 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| ysr@777 | 21 | * have any questions. |
| ysr@777 | 22 | * |
| ysr@777 | 23 | */ |
| ysr@777 | 24 | |
| ysr@777 | 25 | // The Concurrent ZF Thread. Performs concurrent zero-filling. |
| ysr@777 | 26 | |
| ysr@777 | 27 | class ConcurrentZFThread: public ConcurrentGCThread { |
| ysr@777 | 28 | friend class VMStructs; |
| ysr@777 | 29 | friend class ZeroFillRegionClosure; |
| ysr@777 | 30 | |
| ysr@777 | 31 | private: |
| ysr@777 | 32 | |
| ysr@777 | 33 | // Zero fill the heap region. |
| ysr@777 | 34 | void processHeapRegion(HeapRegion* r); |
| ysr@777 | 35 | |
| ysr@777 | 36 | // Stats |
| ysr@777 | 37 | // Allocation (protected by heap lock). |
| ysr@777 | 38 | static int _region_allocs; // Number of regions allocated |
| ysr@777 | 39 | static int _sync_zfs; // Synchronous zero-fills + |
| ysr@777 | 40 | static int _zf_waits; // Wait for conc zero-fill completion. |
| ysr@777 | 41 | |
| ysr@777 | 42 | // Number of regions CFZ thread fills. |
| ysr@777 | 43 | static int _regions_filled; |
| ysr@777 | 44 | |
| ysr@777 | 45 | double _vtime_start; // Initial virtual time. |
| ysr@777 | 46 | |
| ysr@777 | 47 | // These are static because the "print_summary_info" method is, and |
| ysr@777 | 48 | // it currently assumes there is only one ZF thread. We'll change when |
| ysr@777 | 49 | // we need to. |
| ysr@777 | 50 | static double _vtime_accum; // Initial virtual time. |
| ysr@777 | 51 | static double vtime_accum() { return _vtime_accum; } |
| ysr@777 | 52 | |
| ysr@777 | 53 | // Offer yield for GC. Returns true if yield occurred. |
| ysr@777 | 54 | bool offer_yield(); |
| ysr@777 | 55 | |
| ysr@777 | 56 | public: |
| ysr@777 | 57 | // Constructor |
| ysr@777 | 58 | ConcurrentZFThread(); |
| ysr@777 | 59 | |
| ysr@777 | 60 | // Main loop. |
| ysr@777 | 61 | virtual void run(); |
| ysr@777 | 62 | |
| ysr@777 | 63 | // Printing |
| tonyp@1454 | 64 | void print_on(outputStream* st) const; |
| tonyp@1454 | 65 | void print() const; |
| ysr@777 | 66 | |
| ysr@777 | 67 | // Waits until "r" has been zero-filled. Requires caller to hold the |
| ysr@777 | 68 | // ZF_mon. |
| ysr@777 | 69 | static void wait_for_ZF_completed(HeapRegion* r); |
| ysr@777 | 70 | |
| ysr@777 | 71 | // Get or clear the current unclean region. Should be done |
| ysr@777 | 72 | // while holding the ZF_needed_mon lock. |
| ysr@777 | 73 | |
| ysr@777 | 74 | // shutdown |
| iveresov@1229 | 75 | void stop(); |
| ysr@777 | 76 | |
| ysr@777 | 77 | // Stats |
| ysr@777 | 78 | static void note_region_alloc() {_region_allocs++; } |
| ysr@777 | 79 | static void note_sync_zfs() { _sync_zfs++; } |
| ysr@777 | 80 | static void note_zf_wait() { _zf_waits++; } |
| ysr@777 | 81 | static void note_region_filled() { _regions_filled++; } |
| ysr@777 | 82 | |
| ysr@777 | 83 | static void print_summary_info(); |
| ysr@777 | 84 | }; |
