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src/share/vm/gc_implementation/shared/ageTable.hpp@b2ef234911c9 (annotated)
src/share/vm/gc_implementation/shared/ageTable.hpp
Thu, 20 Sep 2012 09:52:56 -0700
- author
- johnc
- date
- Thu, 20 Sep 2012 09:52:56 -0700
- changeset 4067
- b2ef234911c9
- parent 2314
- f95d63e2154a
- child 4129
- 22b8d3d181d9
- permissions
- -rw-r--r--
7190666: G1: assert(_unused == 0) failed: Inconsistency in PLAB stats
Summary: Reset the fields in ParGCAllocBuffer, that are used for accumulating values for the ResizePLAB sensors in PLABStats, to zero after flushing the values to the PLABStats fields. Flush PLABStats values only when retiring the final allocation buffers prior to disposing of a G1ParScanThreadState object, rather than when retiring every allocation buffer.
Reviewed-by: jwilhelm, jmasa, ysr
| duke@435 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP |
| stefank@2314 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "oops/markOop.hpp" |
| stefank@2314 | 29 | #include "oops/oop.hpp" |
| stefank@2314 | 30 | #include "runtime/perfData.hpp" |
| stefank@2314 | 31 | |
| trims@1907 | 32 | /* Copyright (c) 1992-2009 Oracle and/or its affiliates, and Stanford University. |
| duke@435 | 33 | See the LICENSE file for license information. */ |
| duke@435 | 34 | |
| duke@435 | 35 | // Age table for adaptive feedback-mediated tenuring (scavenging) |
| duke@435 | 36 | // |
| duke@435 | 37 | // Note: all sizes are in oops |
| duke@435 | 38 | |
| duke@435 | 39 | class ageTable VALUE_OBJ_CLASS_SPEC { |
| duke@435 | 40 | friend class VMStructs; |
| duke@435 | 41 | |
| duke@435 | 42 | public: |
| duke@435 | 43 | // constants |
| duke@435 | 44 | enum { table_size = markOopDesc::max_age + 1 }; |
| duke@435 | 45 | |
| duke@435 | 46 | // instance variables |
| duke@435 | 47 | size_t sizes[table_size]; |
| duke@435 | 48 | |
| duke@435 | 49 | // constructor. "global" indicates that this is the global age table |
| duke@435 | 50 | // (as opposed to gc-thread-local) |
| duke@435 | 51 | ageTable(bool global = true); |
| duke@435 | 52 | |
| duke@435 | 53 | // clear table |
| duke@435 | 54 | void clear(); |
| duke@435 | 55 | |
| duke@435 | 56 | // add entry |
| duke@435 | 57 | void add(oop p, size_t oop_size) { |
| duke@435 | 58 | int age = p->age(); |
| duke@435 | 59 | assert(age > 0 && age < table_size, "invalid age of object"); |
| duke@435 | 60 | sizes[age] += oop_size; |
| duke@435 | 61 | } |
| duke@435 | 62 | |
| duke@435 | 63 | // Merge another age table with the current one. Used |
| duke@435 | 64 | // for parallel young generation gc. |
| duke@435 | 65 | void merge(ageTable* subTable); |
| apetrusenko@980 | 66 | void merge_par(ageTable* subTable); |
| duke@435 | 67 | |
| duke@435 | 68 | // calculate new tenuring threshold based on age information |
| duke@435 | 69 | int compute_tenuring_threshold(size_t survivor_capacity); |
| duke@435 | 70 | |
| duke@435 | 71 | private: |
| duke@435 | 72 | PerfVariable* _perf_sizes[table_size]; |
| duke@435 | 73 | }; |
| stefank@2314 | 74 | |
| stefank@2314 | 75 | #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP |
