| /* |
| * Copyright (c) 2001, 2019, 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_GC_G1_G1INITIALMARKTOMIXEDTIMETRACKER_HPP |
| #define SHARE_GC_G1_G1INITIALMARKTOMIXEDTIMETRACKER_HPP |
| |
| #include "utilities/globalDefinitions.hpp" |
| #include "utilities/debug.hpp" |
| |
| // Used to track time from the end of initial mark to the first mixed GC. |
| // After calling the initial mark/mixed gc notifications, the result can be |
| // obtained in last_marking_time() once, after which the tracking resets. |
| // Any pauses recorded by add_pause() will be subtracted from that results. |
| class G1InitialMarkToMixedTimeTracker { |
| private: |
| bool _active; |
| double _initial_mark_end_time; |
| double _mixed_start_time; |
| double _total_pause_time; |
| |
| double wall_time() const { |
| return _mixed_start_time - _initial_mark_end_time; |
| } |
| public: |
| G1InitialMarkToMixedTimeTracker() { reset(); } |
| |
| // Record initial mark pause end, starting the time tracking. |
| void record_initial_mark_end(double end_time) { |
| assert(!_active, "Initial mark out of order."); |
| _initial_mark_end_time = end_time; |
| _active = true; |
| } |
| |
| // Record the first mixed gc pause start, ending the time tracking. |
| void record_mixed_gc_start(double start_time) { |
| if (_active) { |
| _mixed_start_time = start_time; |
| _active = false; |
| } |
| } |
| |
| double last_marking_time() { |
| assert(has_result(), "Do not have all measurements yet."); |
| double result = (_mixed_start_time - _initial_mark_end_time) - _total_pause_time; |
| reset(); |
| return result; |
| } |
| |
| void reset() { |
| _active = false; |
| _total_pause_time = 0.0; |
| _initial_mark_end_time = -1.0; |
| _mixed_start_time = -1.0; |
| } |
| |
| void add_pause(double time) { |
| if (_active) { |
| _total_pause_time += time; |
| } |
| } |
| |
| // Returns whether we have a result that can be retrieved. |
| bool has_result() const { return _mixed_start_time > 0.0 && _initial_mark_end_time > 0.0; } |
| }; |
| |
| #endif // SHARE_GC_G1_G1INITIALMARKTOMIXEDTIMETRACKER_HPP |