| /* |
| * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_GC_G1_G1EVACSTATS_HPP |
| #define SHARE_VM_GC_G1_G1EVACSTATS_HPP |
| |
| #include "gc/shared/plab.hpp" |
| |
| // Records various memory allocation statistics gathered during evacuation. |
| class G1EvacStats : public PLABStats { |
| private: |
| size_t _region_end_waste; // Number of words wasted due to skipping to the next region. |
| uint _regions_filled; // Number of regions filled completely. |
| size_t _direct_allocated; // Number of words allocated directly into the regions. |
| |
| // Number of words in live objects remaining in regions that ultimately suffered an |
| // evacuation failure. This is used in the regions when the regions are made old regions. |
| size_t _failure_used; |
| // Number of words wasted in regions which failed evacuation. This is the sum of space |
| // for objects successfully copied out of the regions (now dead space) plus waste at the |
| // end of regions. |
| size_t _failure_waste; |
| |
| virtual void reset() { |
| PLABStats::reset(); |
| _region_end_waste = 0; |
| _regions_filled = 0; |
| _direct_allocated = 0; |
| _failure_used = 0; |
| _failure_waste = 0; |
| } |
| |
| virtual void log_plab_allocation(); |
| |
| virtual size_t compute_desired_plab_sz(); |
| |
| public: |
| G1EvacStats(const char* description, size_t desired_plab_sz_, unsigned wt); |
| |
| ~G1EvacStats(); |
| |
| uint regions_filled() const { return _regions_filled; } |
| size_t region_end_waste() const { return _region_end_waste; } |
| size_t direct_allocated() const { return _direct_allocated; } |
| |
| // Amount of space in heapwords used in the failing regions when an evacuation failure happens. |
| size_t failure_used() const { return _failure_used; } |
| // Amount of space in heapwords wasted (unused) in the failing regions when an evacuation failure happens. |
| size_t failure_waste() const { return _failure_waste; } |
| |
| inline void add_direct_allocated(size_t value); |
| inline void add_region_end_waste(size_t value); |
| inline void add_failure_used_and_waste(size_t used, size_t waste); |
| }; |
| |
| #endif // SHARE_VM_GC_G1_G1EVACSTATS_HPP |