--- /dev/null 2018-05-23 08:05:51.220661352 -0400 +++ new/src/hotspot/share/gc/shared/stringdedup/stringDedupThread.inline.hpp 2018-05-28 11:50:33.528069752 -0400 @@ -0,0 +1,91 @@ +/* + * 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. + * + */ + +#ifndef SHARE_VM_GC_SHARED_STRINGDEDUP_STRINGDEDUPTHREAD_INLINE_HPP +#define SHARE_VM_GC_SHARED_STRINGDEDUP_STRINGDEDUPTHREAD_INLINE_HPP + +#include "gc/shared/suspendibleThreadSet.hpp" +#include "gc/shared/stringdedup/stringDedupQueue.inline.hpp" +#include "gc/shared/stringdedup/stringDedupThread.hpp" + +template +void StringDedupThreadImpl::do_deduplication() { + STAT total_stat; + + deduplicate_shared_strings(&total_stat); + + // Main loop + for (;;) { + STAT stat; + + stat.mark_idle(); + + // Wait for the queue to become non-empty + StringDedupQueue::wait(); + if (this->should_terminate()) { + break; + } + + { + // Include thread in safepoints + SuspendibleThreadSetJoiner sts_join; + + stat.mark_exec(); + StringDedupStat::print_start(&stat); + + // Process the queue + for (;;) { + oop java_string = StringDedupQueue::pop(); + if (java_string == NULL) { + break; + } + + StringDedupTable::deduplicate(java_string, &stat); + + // Safepoint this thread if needed + if (sts_join.should_yield()) { + stat.mark_block(); + sts_join.yield(); + stat.mark_unblock(); + } + } + + stat.mark_done(); + + total_stat.add(&stat); + print_end(&stat, &total_stat); + stat.reset(); + } + + StringDedupTable::clean_entry_cache(); + } +} + +template +void StringDedupThreadImpl::create() { + assert(_thread == NULL, "One string deduplication thread allowed"); + _thread = new StringDedupThreadImpl(); +} + +#endif // SHARE_VM_GC_SHARED_STRINGDEDUP_STRINGDEDUPTHREAD_INLINE_HPP