| /* |
| * Copyright (c) 2014, 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_implementation/g1/g1Log.hpp" |
| #include "gc_implementation/g1/g1StringDedup.hpp" |
| #include "gc_implementation/g1/g1StringDedupTable.hpp" |
| #include "gc_implementation/g1/g1StringDedupThread.hpp" |
| #include "gc_implementation/g1/g1StringDedupQueue.hpp" |
| |
| G1StringDedupThread* G1StringDedupThread::_thread = NULL; |
| |
| G1StringDedupThread::G1StringDedupThread() : |
| ConcurrentGCThread() { |
| set_name("String Deduplication Thread"); |
| create_and_start(); |
| } |
| |
| G1StringDedupThread::~G1StringDedupThread() { |
| ShouldNotReachHere(); |
| } |
| |
| void G1StringDedupThread::create() { |
| assert(G1StringDedup::is_enabled(), "String deduplication not enabled"); |
| assert(_thread == NULL, "One string deduplication thread allowed"); |
| _thread = new G1StringDedupThread(); |
| } |
| |
| G1StringDedupThread* G1StringDedupThread::thread() { |
| assert(G1StringDedup::is_enabled(), "String deduplication not enabled"); |
| assert(_thread != NULL, "String deduplication thread not created"); |
| return _thread; |
| } |
| |
| void G1StringDedupThread::print_on(outputStream* st) const { |
| st->print("\"%s\" ", name()); |
| Thread::print_on(st); |
| st->cr(); |
| } |
| |
| void G1StringDedupThread::run() { |
| G1StringDedupStat total_stat; |
| |
| initialize_in_thread(); |
| wait_for_universe_init(); |
| |
| // Main loop |
| for (;;) { |
| G1StringDedupStat stat; |
| |
| stat.mark_idle(); |
| |
| // Wait for the queue to become non-empty |
| G1StringDedupQueue::wait(); |
| if (_should_terminate) { |
| break; |
| } |
| |
| { |
| // Include thread in safepoints |
| SuspendibleThreadSetJoiner sts; |
| |
| stat.mark_exec(); |
| |
| // Process the queue |
| for (;;) { |
| oop java_string = G1StringDedupQueue::pop(); |
| if (java_string == NULL) { |
| break; |
| } |
| |
| G1StringDedupTable::deduplicate(java_string, stat); |
| |
| // Safepoint this thread if needed |
| if (sts.should_yield()) { |
| stat.mark_block(); |
| sts.yield(); |
| stat.mark_unblock(); |
| } |
| } |
| |
| G1StringDedupTable::trim_entry_cache(); |
| |
| stat.mark_done(); |
| |
| // Print statistics |
| total_stat.add(stat); |
| print(gclog_or_tty, stat, total_stat); |
| } |
| } |
| |
| terminate(); |
| } |
| |
| void G1StringDedupThread::stop() { |
| { |
| MonitorLockerEx ml(Terminator_lock); |
| _thread->_should_terminate = true; |
| } |
| |
| G1StringDedupQueue::cancel_wait(); |
| |
| { |
| MonitorLockerEx ml(Terminator_lock); |
| while (!_thread->_has_terminated) { |
| ml.wait(); |
| } |
| } |
| } |
| |
| void G1StringDedupThread::print(outputStream* st, const G1StringDedupStat& last_stat, const G1StringDedupStat& total_stat) { |
| if (G1Log::fine() || PrintStringDeduplicationStatistics) { |
| G1StringDedupStat::print_summary(st, last_stat, total_stat); |
| if (PrintStringDeduplicationStatistics) { |
| G1StringDedupStat::print_statistics(st, last_stat, false); |
| G1StringDedupStat::print_statistics(st, total_stat, true); |
| G1StringDedupTable::print_statistics(st); |
| G1StringDedupQueue::print_statistics(st); |
| } |
| } |
| } |