1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/gc_implementation/g1/g1StringDedupThread.cpp Tue Mar 18 19:07:22 2014 +0100
1.3 @@ -0,0 +1,124 @@
1.4 +/*
1.5 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "gc_implementation/g1/g1Log.hpp"
1.30 +#include "gc_implementation/g1/g1StringDedup.hpp"
1.31 +#include "gc_implementation/g1/g1StringDedupTable.hpp"
1.32 +#include "gc_implementation/g1/g1StringDedupThread.hpp"
1.33 +#include "gc_implementation/g1/g1StringDedupQueue.hpp"
1.34 +
1.35 +G1StringDedupThread* G1StringDedupThread::_thread = NULL;
1.36 +
1.37 +G1StringDedupThread::G1StringDedupThread() :
1.38 + ConcurrentGCThread() {
1.39 + set_name("String Deduplication Thread");
1.40 + create_and_start();
1.41 +}
1.42 +
1.43 +G1StringDedupThread::~G1StringDedupThread() {
1.44 + ShouldNotReachHere();
1.45 +}
1.46 +
1.47 +void G1StringDedupThread::create() {
1.48 + assert(G1StringDedup::is_enabled(), "String deduplication not enabled");
1.49 + assert(_thread == NULL, "One string deduplication thread allowed");
1.50 + _thread = new G1StringDedupThread();
1.51 +}
1.52 +
1.53 +G1StringDedupThread* G1StringDedupThread::thread() {
1.54 + assert(G1StringDedup::is_enabled(), "String deduplication not enabled");
1.55 + assert(_thread != NULL, "String deduplication thread not created");
1.56 + return _thread;
1.57 +}
1.58 +
1.59 +void G1StringDedupThread::print_on(outputStream* st) const {
1.60 + st->print("\"%s\" ", name());
1.61 + Thread::print_on(st);
1.62 + st->cr();
1.63 +}
1.64 +
1.65 +void G1StringDedupThread::run() {
1.66 + G1StringDedupStat total_stat;
1.67 +
1.68 + initialize_in_thread();
1.69 + wait_for_universe_init();
1.70 +
1.71 + // Main loop
1.72 + for (;;) {
1.73 + G1StringDedupStat stat;
1.74 +
1.75 + stat.mark_idle();
1.76 +
1.77 + // Wait for the queue to become non-empty
1.78 + G1StringDedupQueue::wait();
1.79 +
1.80 + // Include this thread in safepoints
1.81 + stsJoin();
1.82 +
1.83 + stat.mark_exec();
1.84 +
1.85 + // Process the queue
1.86 + for (;;) {
1.87 + oop java_string = G1StringDedupQueue::pop();
1.88 + if (java_string == NULL) {
1.89 + break;
1.90 + }
1.91 +
1.92 + G1StringDedupTable::deduplicate(java_string, stat);
1.93 +
1.94 + // Safepoint this thread if needed
1.95 + if (stsShouldYield()) {
1.96 + stat.mark_block();
1.97 + stsYield(NULL);
1.98 + stat.mark_unblock();
1.99 + }
1.100 + }
1.101 +
1.102 + G1StringDedupTable::trim_entry_cache();
1.103 +
1.104 + stat.mark_done();
1.105 +
1.106 + // Print statistics
1.107 + total_stat.add(stat);
1.108 + print(gclog_or_tty, stat, total_stat);
1.109 +
1.110 + // Exclude this thread from safepoints
1.111 + stsLeave();
1.112 + }
1.113 +
1.114 + ShouldNotReachHere();
1.115 +}
1.116 +
1.117 +void G1StringDedupThread::print(outputStream* st, const G1StringDedupStat& last_stat, const G1StringDedupStat& total_stat) {
1.118 + if (G1Log::fine() || PrintStringDeduplicationStatistics) {
1.119 + G1StringDedupStat::print_summary(st, last_stat, total_stat);
1.120 + if (PrintStringDeduplicationStatistics) {
1.121 + G1StringDedupStat::print_statistics(st, last_stat, false);
1.122 + G1StringDedupStat::print_statistics(st, total_stat, true);
1.123 + G1StringDedupTable::print_statistics(st);
1.124 + G1StringDedupQueue::print_statistics(st);
1.125 + }
1.126 + }
1.127 +}
