| /* |
| * Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved. |
| * |
| * 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_SHENANDOAH_SHENANDOAHHEAPREGIONCOUNTERS_HPP |
| #define SHARE_GC_SHENANDOAH_SHENANDOAHHEAPREGIONCOUNTERS_HPP |
| |
| #include "memory/allocation.hpp" |
| |
| /** |
| * This provides the following in JVMStat: |
| * |
| * constants: |
| * - sun.gc.shenandoah.regions.timestamp the timestamp for this sample |
| * - sun.gc.shenandoah.regions.max_regions maximum number of regions |
| * - sun.gc.shenandoah.regions.region_size size per region, in kilobytes |
| * |
| * variables: |
| * - sun.gc.shenandoah.regions.status current GC status: |
| * - bit 0 set when marking in progress |
| * - bit 1 set when evacuation in progress |
| * - bit 2 set when update refs in progress |
| * - bit 3 set when traversal in progress |
| * |
| * two variable counters per region, with $max_regions (see above) counters: |
| * - sun.gc.shenandoah.regions.region.$i.data |
| * where $ is the region number from 0 <= i < $max_regions |
| * |
| * .data is in the following format: |
| * - bits 0-6 used memory in percent |
| * - bits 7-13 live memory in percent |
| * - bits 14-20 tlab allocated memory in percent |
| * - bits 21-27 gclab allocated memory in percent |
| * - bits 28-34 shared allocated memory in percent |
| * - bits 35-41 <reserved> |
| * - bits 42-50 <reserved> |
| * - bits 51-57 <reserved> |
| * - bits 58-63 status |
| * - bits describe the state as recorded in ShenandoahHeapRegion |
| */ |
| class ShenandoahHeapRegionCounters : public CHeapObj<mtGC> { |
| private: |
| static const jlong PERCENT_MASK = 0x7f; |
| static const jlong STATUS_MASK = 0x3f; |
| |
| static const jlong USED_SHIFT = 0; |
| static const jlong LIVE_SHIFT = 7; |
| static const jlong TLAB_SHIFT = 14; |
| static const jlong GCLAB_SHIFT = 21; |
| static const jlong SHARED_SHIFT = 28; |
| |
| static const jlong STATUS_SHIFT = 58; |
| |
| char* _name_space; |
| PerfLongVariable** _regions_data; |
| PerfLongVariable* _timestamp; |
| PerfLongVariable* _status; |
| volatile jlong _last_sample_millis; |
| |
| public: |
| ShenandoahHeapRegionCounters(); |
| ~ShenandoahHeapRegionCounters(); |
| void update(); |
| }; |
| |
| #endif // SHARE_GC_SHENANDOAH_SHENANDOAHHEAPREGIONCOUNTERS_HPP |