1 /* 2 * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #include "precompiled.hpp" 25 #include "gc/z/zAddress.inline.hpp" 26 #include "gc/z/zThreadLocalAllocBuffer.hpp" 27 #include "gc/z/zValue.inline.hpp" 28 #include "runtime/globals.hpp" 29 #include "runtime/thread.hpp" 30 31 ZPerWorker<ThreadLocalAllocStats>* ZThreadLocalAllocBuffer::_stats = NULL; 32 33 void ZThreadLocalAllocBuffer::initialize() { 34 if (UseTLAB) { 35 assert(_stats == NULL, "Already initialized"); 36 _stats = new ZPerWorker<ThreadLocalAllocStats>(); 37 reset_statistics(); 38 } 39 } 40 41 void ZThreadLocalAllocBuffer::reset_statistics() { 42 if (UseTLAB) { 43 ZPerWorkerIterator<ThreadLocalAllocStats> iter(_stats); 44 for (ThreadLocalAllocStats* stats; iter.next(&stats);) { 45 stats->reset(); 46 } 47 } 48 } 49 50 void ZThreadLocalAllocBuffer::publish_statistics() { 51 if (UseTLAB) { 52 ThreadLocalAllocStats total; 53 54 ZPerWorkerIterator<ThreadLocalAllocStats> iter(_stats); 55 for (ThreadLocalAllocStats* stats; iter.next(&stats);) { 56 total.update(*stats); 57 } 58 59 total.publish(); 60 } 61 } 62 63 static void fixup_address(HeapWord** p) { 64 *p = (HeapWord*)ZAddress::good_or_null((uintptr_t)*p); 65 } 66 67 void ZThreadLocalAllocBuffer::retire(Thread* thread) { 68 if (UseTLAB && thread->is_Java_thread()) { 69 ThreadLocalAllocStats* const stats = _stats->addr(); 70 thread->tlab().addresses_do(fixup_address); 71 thread->tlab().retire(stats); 72 if (ResizeTLAB) { 73 thread->tlab().resize(); 74 } 75 } 76 } 77 78 void ZThreadLocalAllocBuffer::remap(Thread* thread) { 79 if (UseTLAB && thread->is_Java_thread()) { 80 thread->tlab().addresses_do(fixup_address); 81 } 82 }