pliden@6413: /*
pliden@6413:  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
pliden@6413:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
pliden@6413:  *
pliden@6413:  * This code is free software; you can redistribute it and/or modify it
pliden@6413:  * under the terms of the GNU General Public License version 2 only, as
pliden@6413:  * published by the Free Software Foundation.
pliden@6413:  *
pliden@6413:  * This code is distributed in the hope that it will be useful, but WITHOUT
pliden@6413:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
pliden@6413:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
pliden@6413:  * version 2 for more details (a copy is included in the LICENSE file that
pliden@6413:  * accompanied this code).
pliden@6413:  *
pliden@6413:  * You should have received a copy of the GNU General Public License version
pliden@6413:  * 2 along with this work; if not, write to the Free Software Foundation,
pliden@6413:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
pliden@6413:  *
pliden@6413:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
pliden@6413:  * or visit www.oracle.com if you need additional information or have any
pliden@6413:  * questions.
pliden@6413:  *
pliden@6413:  */
pliden@6413: 
pliden@6413: #include "precompiled.hpp"
pliden@6413: #include "gc_implementation/g1/g1Log.hpp"
pliden@6413: #include "gc_implementation/g1/g1StringDedup.hpp"
pliden@6413: #include "gc_implementation/g1/g1StringDedupTable.hpp"
pliden@6413: #include "gc_implementation/g1/g1StringDedupThread.hpp"
pliden@6413: #include "gc_implementation/g1/g1StringDedupQueue.hpp"
pliden@6413: 
pliden@6413: G1StringDedupThread* G1StringDedupThread::_thread = NULL;
pliden@6413: 
pliden@6413: G1StringDedupThread::G1StringDedupThread() :
pliden@6413:   ConcurrentGCThread() {
pliden@6413:   set_name("String Deduplication Thread");
pliden@6413:   create_and_start();
pliden@6413: }
pliden@6413: 
pliden@6413: G1StringDedupThread::~G1StringDedupThread() {
pliden@6413:   ShouldNotReachHere();
pliden@6413: }
pliden@6413: 
pliden@6413: void G1StringDedupThread::create() {
pliden@6413:   assert(G1StringDedup::is_enabled(), "String deduplication not enabled");
pliden@6413:   assert(_thread == NULL, "One string deduplication thread allowed");
pliden@6413:   _thread = new G1StringDedupThread();
pliden@6413: }
pliden@6413: 
pliden@6413: G1StringDedupThread* G1StringDedupThread::thread() {
pliden@6413:   assert(G1StringDedup::is_enabled(), "String deduplication not enabled");
pliden@6413:   assert(_thread != NULL, "String deduplication thread not created");
pliden@6413:   return _thread;
pliden@6413: }
pliden@6413: 
pliden@6413: void G1StringDedupThread::print_on(outputStream* st) const {
pliden@6413:   st->print("\"%s\" ", name());
pliden@6413:   Thread::print_on(st);
pliden@6413:   st->cr();
pliden@6413: }
pliden@6413: 
pliden@6413: void G1StringDedupThread::run() {
pliden@6413:   G1StringDedupStat total_stat;
pliden@6413: 
pliden@6413:   initialize_in_thread();
pliden@6413:   wait_for_universe_init();
pliden@6413: 
pliden@6413:   // Main loop
pliden@6413:   for (;;) {
pliden@6413:     G1StringDedupStat stat;
pliden@6413: 
pliden@6413:     stat.mark_idle();
pliden@6413: 
pliden@6413:     // Wait for the queue to become non-empty
pliden@6413:     G1StringDedupQueue::wait();
pliden@6413: 
pliden@6413:     // Include this thread in safepoints
pliden@6413:     stsJoin();
pliden@6413: 
pliden@6413:     stat.mark_exec();
pliden@6413: 
pliden@6413:     // Process the queue
pliden@6413:     for (;;) {
pliden@6413:       oop java_string = G1StringDedupQueue::pop();
pliden@6413:       if (java_string == NULL) {
pliden@6413:         break;
pliden@6413:       }
pliden@6413: 
pliden@6413:       G1StringDedupTable::deduplicate(java_string, stat);
pliden@6413: 
pliden@6413:       // Safepoint this thread if needed
pliden@6413:       if (stsShouldYield()) {
pliden@6413:         stat.mark_block();
pliden@6413:         stsYield(NULL);
pliden@6413:         stat.mark_unblock();
pliden@6413:       }
pliden@6413:     }
pliden@6413: 
pliden@6413:     G1StringDedupTable::trim_entry_cache();
pliden@6413: 
pliden@6413:     stat.mark_done();
pliden@6413: 
pliden@6413:     // Print statistics
pliden@6413:     total_stat.add(stat);
pliden@6413:     print(gclog_or_tty, stat, total_stat);
pliden@6413: 
pliden@6413:     // Exclude this thread from safepoints
pliden@6413:     stsLeave();
pliden@6413:   }
pliden@6413: 
pliden@6413:   ShouldNotReachHere();
pliden@6413: }
pliden@6413: 
pliden@6413: void G1StringDedupThread::print(outputStream* st, const G1StringDedupStat& last_stat, const G1StringDedupStat& total_stat) {
pliden@6413:   if (G1Log::fine() || PrintStringDeduplicationStatistics) {
pliden@6413:     G1StringDedupStat::print_summary(st, last_stat, total_stat);
pliden@6413:     if (PrintStringDeduplicationStatistics) {
pliden@6413:       G1StringDedupStat::print_statistics(st, last_stat, false);
pliden@6413:       G1StringDedupStat::print_statistics(st, total_stat, true);
pliden@6413:       G1StringDedupTable::print_statistics(st);
pliden@6413:       G1StringDedupQueue::print_statistics(st);
pliden@6413:     }
pliden@6413:   }
pliden@6413: }