1 /* 2 * Copyright (c) 2018, Red Hat, Inc. All rights reserved. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 #ifndef SHARE_VM_GC_SHENANDOAH_HEURISTICS_SHENANDOAHADAPTIVEHEURISTICS_HPP 25 #define SHARE_VM_GC_SHENANDOAH_HEURISTICS_SHENANDOAHADAPTIVEHEURISTICS_HPP 26 27 #include "gc/shenandoah/shenandoahHeuristics.hpp" 28 #include "gc/shenandoah/shenandoahPhaseTimings.hpp" 29 #include "utilities/numberSeq.hpp" 30 31 class ShenandoahAdaptiveHeuristics : public ShenandoahHeuristics { 32 private: 33 TruncatedSeq* _cycle_gap_history; 34 TruncatedSeq* _conc_mark_duration_history; 35 TruncatedSeq* _conc_uprefs_duration_history; 36 37 public: 38 ShenandoahAdaptiveHeuristics(); 39 40 virtual ~ShenandoahAdaptiveHeuristics(); 41 42 virtual void choose_collection_set_from_regiondata(ShenandoahCollectionSet* cset, 43 RegionData* data, size_t size, 44 size_t actual_free); 45 46 void record_cycle_start(); 47 48 virtual void record_phase_time(ShenandoahPhaseTimings::Phase phase, double secs); 49 50 virtual bool should_start_gc() const; 51 52 virtual bool should_start_update_refs(); 53 54 virtual const char* name(); 55 56 virtual bool is_diagnostic(); 57 58 virtual bool is_experimental(); 59 }; 60 61 #endif // SHARE_VM_GC_SHENANDOAH_HEURISTICS_SHENANDOAHADAPTIVEHEURISTICS_HPP