--- old/src/share/vm/memory/referencePolicy.cpp 2015-05-12 11:57:37.514781390 +0200 +++ /dev/null 2015-03-18 17:10:38.111854831 +0100 @@ -1,86 +0,0 @@ -/* - * Copyright (c) 2000, 2011, 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. - * - */ - -#include "precompiled.hpp" -#include "classfile/javaClasses.hpp" -#include "memory/referencePolicy.hpp" -#include "memory/universe.hpp" -#include "runtime/arguments.hpp" -#include "runtime/globals.hpp" - -LRUCurrentHeapPolicy::LRUCurrentHeapPolicy() { - setup(); -} - -// Capture state (of-the-VM) information needed to evaluate the policy -void LRUCurrentHeapPolicy::setup() { - _max_interval = (Universe::get_heap_free_at_last_gc() / M) * SoftRefLRUPolicyMSPerMB; - assert(_max_interval >= 0,"Sanity check"); -} - -// The oop passed in is the SoftReference object, and not -// the object the SoftReference points to. -bool LRUCurrentHeapPolicy::should_clear_reference(oop p, - jlong timestamp_clock) { - jlong interval = timestamp_clock - java_lang_ref_SoftReference::timestamp(p); - assert(interval >= 0, "Sanity check"); - - // The interval will be zero if the ref was accessed since the last scavenge/gc. - if(interval <= _max_interval) { - return false; - } - - return true; -} - -/////////////////////// MaxHeap ////////////////////// - -LRUMaxHeapPolicy::LRUMaxHeapPolicy() { - setup(); -} - -// Capture state (of-the-VM) information needed to evaluate the policy -void LRUMaxHeapPolicy::setup() { - size_t max_heap = MaxHeapSize; - max_heap -= Universe::get_heap_used_at_last_gc(); - max_heap /= M; - - _max_interval = max_heap * SoftRefLRUPolicyMSPerMB; - assert(_max_interval >= 0,"Sanity check"); -} - -// The oop passed in is the SoftReference object, and not -// the object the SoftReference points to. -bool LRUMaxHeapPolicy::should_clear_reference(oop p, - jlong timestamp_clock) { - jlong interval = timestamp_clock - java_lang_ref_SoftReference::timestamp(p); - assert(interval >= 0, "Sanity check"); - - // The interval will be zero if the ref was accessed since the last scavenge/gc. - if(interval <= _max_interval) { - return false; - } - - return true; -} --- /dev/null 2015-03-18 17:10:38.111854831 +0100 +++ new/src/share/vm/gc/shared/referencePolicy.cpp 2015-05-12 11:57:37.332773721 +0200 @@ -0,0 +1,86 @@ +/* + * Copyright (c) 2000, 2015, 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. + * + */ + +#include "precompiled.hpp" +#include "classfile/javaClasses.hpp" +#include "gc/shared/referencePolicy.hpp" +#include "memory/universe.hpp" +#include "runtime/arguments.hpp" +#include "runtime/globals.hpp" + +LRUCurrentHeapPolicy::LRUCurrentHeapPolicy() { + setup(); +} + +// Capture state (of-the-VM) information needed to evaluate the policy +void LRUCurrentHeapPolicy::setup() { + _max_interval = (Universe::get_heap_free_at_last_gc() / M) * SoftRefLRUPolicyMSPerMB; + assert(_max_interval >= 0,"Sanity check"); +} + +// The oop passed in is the SoftReference object, and not +// the object the SoftReference points to. +bool LRUCurrentHeapPolicy::should_clear_reference(oop p, + jlong timestamp_clock) { + jlong interval = timestamp_clock - java_lang_ref_SoftReference::timestamp(p); + assert(interval >= 0, "Sanity check"); + + // The interval will be zero if the ref was accessed since the last scavenge/gc. + if(interval <= _max_interval) { + return false; + } + + return true; +} + +/////////////////////// MaxHeap ////////////////////// + +LRUMaxHeapPolicy::LRUMaxHeapPolicy() { + setup(); +} + +// Capture state (of-the-VM) information needed to evaluate the policy +void LRUMaxHeapPolicy::setup() { + size_t max_heap = MaxHeapSize; + max_heap -= Universe::get_heap_used_at_last_gc(); + max_heap /= M; + + _max_interval = max_heap * SoftRefLRUPolicyMSPerMB; + assert(_max_interval >= 0,"Sanity check"); +} + +// The oop passed in is the SoftReference object, and not +// the object the SoftReference points to. +bool LRUMaxHeapPolicy::should_clear_reference(oop p, + jlong timestamp_clock) { + jlong interval = timestamp_clock - java_lang_ref_SoftReference::timestamp(p); + assert(interval >= 0, "Sanity check"); + + // The interval will be zero if the ref was accessed since the last scavenge/gc. + if(interval <= _max_interval) { + return false; + } + + return true; +}