| /* |
| * Copyright (c) 2020, 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. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "gc/g1/g1BlockOffsetTable.hpp" |
| #include "gc/g1/g1RegionToSpaceMapper.hpp" |
| #include "memory/virtualspace.hpp" |
| #include "gc/shared/workgroup.hpp" |
| #include "runtime/atomic.hpp" |
| #include "runtime/os.hpp" |
| #include "unittest.hpp" |
| |
| class G1MapperWorkers : AllStatic { |
| static WorkGang* _work_gang; |
| static WorkGang* work_gang() { |
| if (_work_gang == NULL) { |
| _work_gang = new WorkGang("G1 Small Workers", MaxWorkers, false, false); |
| _work_gang->initialize_workers(); |
| _work_gang->update_active_workers(MaxWorkers); |
| } |
| return _work_gang; |
| } |
| |
| public: |
| static const uint MaxWorkers = 4; |
| static void run_task(AbstractGangTask* task) { |
| work_gang()->run_task(task); |
| } |
| }; |
| WorkGang* G1MapperWorkers::_work_gang = NULL; |
| |
| class G1TestCommitUncommit : public AbstractGangTask { |
| G1RegionToSpaceMapper* _mapper; |
| uint _claim_id; |
| public: |
| G1TestCommitUncommit(G1RegionToSpaceMapper* mapper) : |
| AbstractGangTask("Stress mapper"), |
| _mapper(mapper), |
| _claim_id(0) { } |
| |
| void work(uint worker_id) { |
| uint index = Atomic::fetch_and_add(&_claim_id, 1u); |
| |
| for (int i = 0; i < 100000; i++) { |
| // Stress commit and uncommit of a single region. The same |
| // will be done for multiple adjacent region to make sure |
| // we properly handle bitmap updates as well as updates for |
| // regions sharing the same underlying OS page. |
| _mapper->commit_regions(index); |
| _mapper->uncommit_regions(index); |
| } |
| } |
| }; |
| |
| TEST_VM(G1RegionToSpaceMapper, smallStressAdjacent) { |
| // Fake a heap with 1m regions and create a BOT like mapper. This |
| // will give a G1RegionsSmallerThanCommitSizeMapper to stress. |
| uint num_regions = G1MapperWorkers::MaxWorkers; |
| size_t region_size = 1*M; |
| size_t size = G1BlockOffsetTable::compute_size(num_regions * region_size / HeapWordSize); |
| size_t page_size = os::vm_page_size(); |
| |
| ReservedSpace rs(size, os::vm_page_size()); |
| |
| G1RegionToSpaceMapper* small_mapper = |
| G1RegionToSpaceMapper::create_mapper(rs, |
| size, |
| page_size, |
| region_size, |
| G1BlockOffsetTable::heap_map_factor(), |
| mtGC); |
| |
| |
| |
| G1TestCommitUncommit task(small_mapper); |
| G1MapperWorkers::run_task(&task); |
| } |
| |
| TEST_VM(G1RegionToSpaceMapper, largeStressAdjacent) { |
| // Fake a heap with 2m regions and create a BOT like mapper. This |
| // will give a G1RegionsLargerThanCommitSizeMapper to stress. |
| uint num_regions = G1MapperWorkers::MaxWorkers; |
| size_t region_size = 2*M; |
| size_t size = G1BlockOffsetTable::compute_size(num_regions * region_size / HeapWordSize); |
| size_t page_size = os::vm_page_size(); |
| |
| ReservedSpace rs(size, page_size); |
| |
| G1RegionToSpaceMapper* large_mapper = |
| G1RegionToSpaceMapper::create_mapper(rs, |
| size, |
| page_size, |
| region_size, |
| G1BlockOffsetTable::heap_map_factor(), |
| mtGC); |
| |
| G1TestCommitUncommit task(large_mapper); |
| G1MapperWorkers::run_task(&task); |
| } |