1' Copyright (c) 2021-2022 Huawei Device Co., Ltd. 2' Licensed under the Apache License, Version 2.0 (the "License"); 3' you may not use this file except in compliance with the License. 4' You may obtain a copy of the License at 5' 6' http://www.apache.org/licenses/LICENSE-2.0 7' 8' Unless required by applicable law or agreed to in writing, software 9' distributed under the License is distributed on an "AS IS" BASIS, 10' WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11' See the License for the specific language governing permissions and 12' limitations under the License. 13 14@startuml 15skinparam monochrome true 16title G1 concurrent marking; 17|STW| 18:Initial mark 19triggered when threshold reached after Young GC; 20:Enable pre-barrier; 21|Concurrent| 22:Concurrently mark objects in the tenured space; 23:Fill RemSets; 24|STW| 25:Disable pre-barrier; 26:Remark (drain SATB buffers, reference processing); 27:Cleanup (accounting, prepare data for candidates for mixed GC); 28|Concurrent| 29stop 30@enduml 31