Mercurial > hg > graal-compiler
view src/share/vm/memory/referencePolicy.cpp @ 1630:7cc68a696c62
6966252: Bump the HS19 build number to 04
Summary: Update the HS19 build number to 04
Reviewed-by: jcoomes
author | trims |
---|---|
date | Fri, 02 Jul 2010 01:37:36 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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/* * Copyright (c) 2000, 2008, 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 "incls/_precompiled.incl" # include "incls/_referencePolicy.cpp.incl" 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 interval = java_lang_ref_SoftReference::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 interval = java_lang_ref_SoftReference::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; }