121 lines
4.2 KiB
C++
121 lines
4.2 KiB
C++
/*
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* Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "gc/g1/g1BlockOffsetTable.hpp"
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#include "gc/g1/g1RegionToSpaceMapper.hpp"
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#include "gc/shared/workerThread.hpp"
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#include "memory/virtualspace.hpp"
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#include "runtime/atomic.hpp"
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#include "runtime/os.hpp"
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#include "unittest.hpp"
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class G1MapperWorkers : AllStatic {
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static WorkerThreads* _workers;
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static WorkerThreads* workers() {
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if (_workers == nullptr) {
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_workers = new WorkerThreads("G1 Small Workers", MaxWorkers);
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_workers->initialize_workers();
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_workers->set_active_workers(MaxWorkers);
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}
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return _workers;
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}
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public:
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static const uint MaxWorkers = 4;
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static void run_task(WorkerTask* task) {
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workers()->run_task(task);
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}
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};
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WorkerThreads* G1MapperWorkers::_workers = nullptr;
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class G1TestCommitUncommit : public WorkerTask {
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G1RegionToSpaceMapper* _mapper;
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uint _claim_id;
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public:
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G1TestCommitUncommit(G1RegionToSpaceMapper* mapper) :
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WorkerTask("Stress mapper"),
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_mapper(mapper),
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_claim_id(0) { }
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void work(uint worker_id) {
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uint index = Atomic::fetch_then_add(&_claim_id, 1u);
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for (int i = 0; i < 100000; i++) {
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// Stress commit and uncommit of a single region. The same
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// will be done for multiple adjacent region to make sure
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// we properly handle bitmap updates as well as updates for
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// regions sharing the same underlying OS page.
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_mapper->commit_regions(index);
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_mapper->uncommit_regions(index);
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}
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}
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};
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TEST_VM(G1RegionToSpaceMapper, smallStressAdjacent) {
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// Fake a heap with 1m regions and create a BOT like mapper. This
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// will give a G1RegionsSmallerThanCommitSizeMapper to stress.
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uint num_regions = G1MapperWorkers::MaxWorkers;
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size_t region_size = 1*M;
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size_t size = G1BlockOffsetTable::compute_size(num_regions * region_size / HeapWordSize);
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size_t page_size = os::vm_page_size();
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ReservedSpace rs(size, os::vm_page_size());
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G1RegionToSpaceMapper* small_mapper =
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G1RegionToSpaceMapper::create_mapper(rs,
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size,
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page_size,
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region_size,
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G1BlockOffsetTable::heap_map_factor(),
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mtGC);
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G1TestCommitUncommit task(small_mapper);
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G1MapperWorkers::run_task(&task);
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}
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TEST_VM(G1RegionToSpaceMapper, largeStressAdjacent) {
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// Fake a heap with 2m regions and create a BOT like mapper. This
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// will give a G1RegionsLargerThanCommitSizeMapper to stress.
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uint num_regions = G1MapperWorkers::MaxWorkers;
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size_t region_size = 2*M;
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size_t size = G1BlockOffsetTable::compute_size(num_regions * region_size / HeapWordSize);
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size_t page_size = os::vm_page_size();
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ReservedSpace rs(size, page_size);
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G1RegionToSpaceMapper* large_mapper =
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G1RegionToSpaceMapper::create_mapper(rs,
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size,
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page_size,
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region_size,
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G1BlockOffsetTable::heap_map_factor(),
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mtGC);
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G1TestCommitUncommit task(large_mapper);
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G1MapperWorkers::run_task(&task);
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}
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