| /* |
| * Copyright (c) 2018, 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/shared/oopStorage.inline.hpp" |
| #include "gc/shared/oopStorageParState.inline.hpp" |
| #include "gc/shared/workgroup.hpp" |
| #include "logging/log.hpp" |
| #include "logging/logConfiguration.hpp" |
| #include "memory/allocation.inline.hpp" |
| #include "memory/iterator.inline.hpp" |
| #include "runtime/interfaceSupport.inline.hpp" |
| #include "runtime/os.hpp" |
| #include "runtime/thread.hpp" |
| #include "runtime/vmOperations.hpp" |
| #include "runtime/vmThread.hpp" |
| #include "utilities/debug.hpp" |
| #include "utilities/ostream.hpp" |
| #include "utilities/ticks.hpp" |
| |
| #include "unittest.hpp" |
| |
| // This "test" doesn't really verify much. Rather, it's mostly a |
| // microbenchmark for OopStorage parallel iteration. It executes |
| // parallel iteration with varying numbers of threads on an storage |
| // object containing a large number of entries, and logs some stats |
| // about the distribution and performance of the iteration. |
| |
| // Parallel iteration not available unless INCLUDE_ALL_GCS |
| #if INCLUDE_ALL_GCS |
| |
| const uint _max_workers = 10; |
| static uint _num_workers = 0; |
| const size_t _storage_entries = 1000000; |
| |
| class OopStorageParIterPerf : public ::testing::Test { |
| public: |
| OopStorageParIterPerf(); |
| ~OopStorageParIterPerf(); |
| |
| WorkGang* workers() const; |
| |
| class VM_ParStateTime; |
| class Task; |
| class Closure; |
| |
| Tickspan run_task(Task* task, uint nthreads); |
| void show_task(const Task* task, Tickspan duration, uint nthreads); |
| void run_test(uint nthreads); |
| |
| static WorkGang* _workers; |
| |
| static const int _active_rank = Mutex::leaf - 1; |
| static const int _allocate_rank = Mutex::leaf; |
| |
| Mutex _allocate_mutex; |
| Mutex _active_mutex; |
| OopStorage _storage; |
| oop* _entries[_storage_entries]; |
| }; |
| |
| WorkGang* OopStorageParIterPerf::_workers = NULL; |
| |
| WorkGang* OopStorageParIterPerf::workers() const { |
| if (_workers == NULL) { |
| WorkGang* wg = new WorkGang("OopStorageParIterPerf workers", |
| _num_workers, |
| false, |
| false); |
| wg->initialize_workers(); |
| wg->update_active_workers(_num_workers); |
| _workers = wg; |
| } |
| return _workers; |
| } |
| |
| OopStorageParIterPerf::OopStorageParIterPerf() : |
| _allocate_mutex(_allocate_rank, |
| "test_OopStorage_parperf_allocate", |
| false, |
| Mutex::_safepoint_check_never), |
| _active_mutex(_active_rank, |
| "test_OopStorage_parperf_active", |
| false, |
| Mutex::_safepoint_check_never), |
| _storage("Test Storage", &_allocate_mutex, &_active_mutex) |
| { |
| for (size_t i = 0; i < _storage_entries; ++i) { |
| _entries[i] = _storage.allocate(); |
| } |
| _num_workers = MIN2(_max_workers, (uint)os::processor_count()); |
| } |
| |
| OopStorageParIterPerf::~OopStorageParIterPerf() { |
| _storage.release(_entries, ARRAY_SIZE(_entries)); |
| } |
| |
| class OopStorageParIterPerf::VM_ParStateTime : public VM_GTestExecuteAtSafepoint { |
| public: |
| VM_ParStateTime(WorkGang* workers, AbstractGangTask* task, uint nthreads) : |
| _workers(workers), _task(task), _nthreads(nthreads) |
| {} |
| |
| void doit() { |
| _workers->run_task(_task, _nthreads); |
| } |
| |
| private: |
| WorkGang* _workers; |
| AbstractGangTask* _task; |
| uint _nthreads; |
| }; |
| |
| class OopStorageParIterPerf::Task : public AbstractGangTask { |
| typedef OopStorage::ParState<false, false> StateType; |
| |
| Tickspan* _worker_times; |
| StateType _state; |
| OopClosure* _closure; |
| |
| public: |
| Task(OopStorage* storage, OopClosure* closure, uint nthreads) : |
| AbstractGangTask("OopStorageParIterPerf::Task"), |
| _worker_times(NULL), |
| _state(storage, nthreads), |
| _closure(closure) |
| { |
| Tickspan* wtimes = NEW_C_HEAP_ARRAY(Tickspan, _num_workers, mtInternal); |
| for (uint i = 0; i < _num_workers; ++i) { |
| new (&wtimes[i]) Tickspan(); |
| } |
| _worker_times = wtimes; |
| } |
| |
| ~Task() { |
| FREE_C_HEAP_ARRAY(Tickspan, _worker_times); |
| } |
| |
| virtual void work(uint worker_id) { |
| Ticks start_time = Ticks::now(); |
| _state.oops_do(_closure); |
| _worker_times[worker_id] = Ticks::now() - start_time; |
| } |
| |
| const Tickspan* worker_times() const { return _worker_times; } |
| }; |
| |
| class OopStorageParIterPerf::Closure : public OopClosure { |
| public: |
| virtual void do_oop(oop* p) { guarantee(*p == NULL, "expected NULL"); } |
| virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
| }; |
| |
| Tickspan OopStorageParIterPerf::run_task(Task* task, uint nthreads) { |
| tty->print_cr("Running test with %u threads", nthreads); |
| VM_ParStateTime op(workers(), task, nthreads); |
| ThreadInVMfromNative invm(JavaThread::current()); |
| Ticks start_time = Ticks::now(); |
| VMThread::execute(&op); |
| return Ticks::now() - start_time; |
| } |
| |
| void OopStorageParIterPerf::show_task(const Task* task, Tickspan duration, uint nthreads) { |
| tty->print_cr("Run test with %u threads: " JLONG_FORMAT, nthreads, duration.value()); |
| const Tickspan* wtimes = task->worker_times(); |
| for (uint i = 0; i < _num_workers; ++i) { |
| if (wtimes[i] != Tickspan()) { |
| tty->print_cr(" %u: " JLONG_FORMAT, i, wtimes[i].value()); |
| } |
| } |
| tty->cr(); |
| } |
| |
| void OopStorageParIterPerf::run_test(uint nthreads) { |
| if (nthreads <= _num_workers) { |
| SCOPED_TRACE(err_msg("Running test with %u threads", nthreads).buffer()); |
| Closure closure; |
| Task task(&_storage, &closure, nthreads); |
| Tickspan t = run_task(&task, nthreads); |
| show_task(&task, t, nthreads); |
| } |
| } |
| |
| TEST_VM_F(OopStorageParIterPerf, test) { |
| // Enable additional interesting logging. |
| #define TEST_TAGS oopstorage, blocks, stats |
| // There isn't an obvious way to capture the old log level so it |
| // can be restored here, so just use Warning as the "default". |
| LogLevelType old_level = LogLevel::Warning; |
| if (log_is_enabled(Debug, TEST_TAGS)) { |
| old_level = LogLevel::Debug; |
| } else if (log_is_enabled(Info, TEST_TAGS)) { |
| old_level = LogLevel::Info; |
| } |
| bool debug_enabled = old_level == LogLevel::Debug; |
| if (!debug_enabled) { |
| LogConfiguration::configure_stdout(LogLevel::Debug, true, LOG_TAGS(TEST_TAGS)); |
| } |
| |
| run_test(1); |
| run_test(2); |
| run_test(3); |
| run_test(4); |
| run_test(6); |
| run_test(8); |
| run_test(10); |
| |
| if (!debug_enabled) { |
| LogConfiguration::configure_stdout(old_level, true, LOG_TAGS(TEST_TAGS)); |
| } |
| } |
| |
| #endif // INCLUDE_ALL_GCS |