Mon, 08 Dec 2014 18:57:33 +0100
8067655: Clean up G1 remembered set oop iteration
Summary: Pass on the static type G1ParPushHeapRSClosure to allow oop_iterate devirtualization
Reviewed-by: jmasa, kbarrett
pliden@6413 | 1 | /* |
pliden@6413 | 2 | * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
pliden@6413 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
pliden@6413 | 4 | * |
pliden@6413 | 5 | * This code is free software; you can redistribute it and/or modify it |
pliden@6413 | 6 | * under the terms of the GNU General Public License version 2 only, as |
pliden@6413 | 7 | * published by the Free Software Foundation. |
pliden@6413 | 8 | * |
pliden@6413 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
pliden@6413 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
pliden@6413 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
pliden@6413 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
pliden@6413 | 13 | * accompanied this code). |
pliden@6413 | 14 | * |
pliden@6413 | 15 | * You should have received a copy of the GNU General Public License version |
pliden@6413 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
pliden@6413 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
pliden@6413 | 18 | * |
pliden@6413 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
pliden@6413 | 20 | * or visit www.oracle.com if you need additional information or have any |
pliden@6413 | 21 | * questions. |
pliden@6413 | 22 | * |
pliden@6413 | 23 | */ |
pliden@6413 | 24 | |
pliden@6413 | 25 | #include "precompiled.hpp" |
pliden@6413 | 26 | #include "gc_implementation/g1/g1Log.hpp" |
pliden@6413 | 27 | #include "gc_implementation/g1/g1StringDedup.hpp" |
pliden@6413 | 28 | #include "gc_implementation/g1/g1StringDedupTable.hpp" |
pliden@6413 | 29 | #include "gc_implementation/g1/g1StringDedupThread.hpp" |
pliden@6413 | 30 | #include "gc_implementation/g1/g1StringDedupQueue.hpp" |
pliden@6413 | 31 | |
pliden@6413 | 32 | G1StringDedupThread* G1StringDedupThread::_thread = NULL; |
pliden@6413 | 33 | |
pliden@6413 | 34 | G1StringDedupThread::G1StringDedupThread() : |
pliden@6413 | 35 | ConcurrentGCThread() { |
pliden@6413 | 36 | set_name("String Deduplication Thread"); |
pliden@6413 | 37 | create_and_start(); |
pliden@6413 | 38 | } |
pliden@6413 | 39 | |
pliden@6413 | 40 | G1StringDedupThread::~G1StringDedupThread() { |
pliden@6413 | 41 | ShouldNotReachHere(); |
pliden@6413 | 42 | } |
pliden@6413 | 43 | |
pliden@6413 | 44 | void G1StringDedupThread::create() { |
pliden@6413 | 45 | assert(G1StringDedup::is_enabled(), "String deduplication not enabled"); |
pliden@6413 | 46 | assert(_thread == NULL, "One string deduplication thread allowed"); |
pliden@6413 | 47 | _thread = new G1StringDedupThread(); |
pliden@6413 | 48 | } |
pliden@6413 | 49 | |
pliden@6413 | 50 | G1StringDedupThread* G1StringDedupThread::thread() { |
pliden@6413 | 51 | assert(G1StringDedup::is_enabled(), "String deduplication not enabled"); |
pliden@6413 | 52 | assert(_thread != NULL, "String deduplication thread not created"); |
pliden@6413 | 53 | return _thread; |
pliden@6413 | 54 | } |
pliden@6413 | 55 | |
pliden@6413 | 56 | void G1StringDedupThread::print_on(outputStream* st) const { |
pliden@6413 | 57 | st->print("\"%s\" ", name()); |
pliden@6413 | 58 | Thread::print_on(st); |
pliden@6413 | 59 | st->cr(); |
pliden@6413 | 60 | } |
pliden@6413 | 61 | |
pliden@6413 | 62 | void G1StringDedupThread::run() { |
pliden@6413 | 63 | G1StringDedupStat total_stat; |
pliden@6413 | 64 | |
pliden@6413 | 65 | initialize_in_thread(); |
pliden@6413 | 66 | wait_for_universe_init(); |
pliden@6413 | 67 | |
pliden@6413 | 68 | // Main loop |
pliden@6413 | 69 | for (;;) { |
pliden@6413 | 70 | G1StringDedupStat stat; |
pliden@6413 | 71 | |
pliden@6413 | 72 | stat.mark_idle(); |
pliden@6413 | 73 | |
pliden@6413 | 74 | // Wait for the queue to become non-empty |
pliden@6413 | 75 | G1StringDedupQueue::wait(); |
pliden@6690 | 76 | if (_should_terminate) { |
pliden@6690 | 77 | break; |
pliden@6690 | 78 | } |
pliden@6413 | 79 | |
pliden@6906 | 80 | { |
pliden@6906 | 81 | // Include thread in safepoints |
pliden@6906 | 82 | SuspendibleThreadSetJoiner sts; |
pliden@6413 | 83 | |
pliden@6906 | 84 | stat.mark_exec(); |
pliden@6413 | 85 | |
pliden@6906 | 86 | // Process the queue |
pliden@6906 | 87 | for (;;) { |
pliden@6906 | 88 | oop java_string = G1StringDedupQueue::pop(); |
pliden@6906 | 89 | if (java_string == NULL) { |
pliden@6906 | 90 | break; |
pliden@6906 | 91 | } |
pliden@6906 | 92 | |
pliden@6906 | 93 | G1StringDedupTable::deduplicate(java_string, stat); |
pliden@6906 | 94 | |
pliden@6906 | 95 | // Safepoint this thread if needed |
pliden@6906 | 96 | if (sts.should_yield()) { |
pliden@6906 | 97 | stat.mark_block(); |
pliden@6906 | 98 | sts.yield(); |
pliden@6906 | 99 | stat.mark_unblock(); |
pliden@6906 | 100 | } |
pliden@6413 | 101 | } |
pliden@6413 | 102 | |
pliden@6906 | 103 | G1StringDedupTable::trim_entry_cache(); |
pliden@6413 | 104 | |
pliden@6906 | 105 | stat.mark_done(); |
pliden@6906 | 106 | |
pliden@6906 | 107 | // Print statistics |
pliden@6906 | 108 | total_stat.add(stat); |
pliden@6906 | 109 | print(gclog_or_tty, stat, total_stat); |
pliden@6413 | 110 | } |
pliden@6413 | 111 | } |
pliden@6413 | 112 | |
pliden@6690 | 113 | terminate(); |
pliden@6690 | 114 | } |
pliden@6690 | 115 | |
pliden@6690 | 116 | void G1StringDedupThread::stop() { |
pliden@6690 | 117 | { |
pliden@6690 | 118 | MonitorLockerEx ml(Terminator_lock); |
pliden@6690 | 119 | _thread->_should_terminate = true; |
pliden@6690 | 120 | } |
pliden@6690 | 121 | |
pliden@6690 | 122 | G1StringDedupQueue::cancel_wait(); |
pliden@6690 | 123 | |
pliden@6690 | 124 | { |
pliden@6690 | 125 | MonitorLockerEx ml(Terminator_lock); |
pliden@6690 | 126 | while (!_thread->_has_terminated) { |
pliden@6690 | 127 | ml.wait(); |
pliden@6690 | 128 | } |
pliden@6690 | 129 | } |
pliden@6413 | 130 | } |
pliden@6413 | 131 | |
pliden@6413 | 132 | void G1StringDedupThread::print(outputStream* st, const G1StringDedupStat& last_stat, const G1StringDedupStat& total_stat) { |
pliden@6413 | 133 | if (G1Log::fine() || PrintStringDeduplicationStatistics) { |
pliden@6413 | 134 | G1StringDedupStat::print_summary(st, last_stat, total_stat); |
pliden@6413 | 135 | if (PrintStringDeduplicationStatistics) { |
pliden@6413 | 136 | G1StringDedupStat::print_statistics(st, last_stat, false); |
pliden@6413 | 137 | G1StringDedupStat::print_statistics(st, total_stat, true); |
pliden@6413 | 138 | G1StringDedupTable::print_statistics(st); |
pliden@6413 | 139 | G1StringDedupQueue::print_statistics(st); |
pliden@6413 | 140 | } |
pliden@6413 | 141 | } |
pliden@6413 | 142 | } |