1 /*
2 * Copyright (c) 2000, 2011, 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
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.hpp"
27 #include "memory/referencePolicy.hpp"
28 #include "memory/universe.hpp"
29 #include "runtime/arguments.hpp"
30 #include "runtime/globals.hpp"
31
32 LRUCurrentHeapPolicy::LRUCurrentHeapPolicy() {
33 setup();
34 }
35
36 // Capture state (of-the-VM) information needed to evaluate the policy
37 void LRUCurrentHeapPolicy::setup() {
38 _max_interval = (Universe::get_heap_free_at_last_gc() / M) * SoftRefLRUPolicyMSPerMB;
39 assert(_max_interval >= 0,"Sanity check");
40 }
41
42 // The oop passed in is the SoftReference object, and not
43 // the object the SoftReference points to.
44 bool LRUCurrentHeapPolicy::should_clear_reference(oop p,
45 jlong timestamp_clock) {
46 jlong interval = timestamp_clock - java_lang_ref_SoftReference::timestamp(p);
47 assert(interval >= 0, "Sanity check");
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1 /*
2 * Copyright (c) 2000, 2015, 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
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.hpp"
27 #include "gc/shared/referencePolicy.hpp"
28 #include "memory/universe.hpp"
29 #include "runtime/arguments.hpp"
30 #include "runtime/globals.hpp"
31
32 LRUCurrentHeapPolicy::LRUCurrentHeapPolicy() {
33 setup();
34 }
35
36 // Capture state (of-the-VM) information needed to evaluate the policy
37 void LRUCurrentHeapPolicy::setup() {
38 _max_interval = (Universe::get_heap_free_at_last_gc() / M) * SoftRefLRUPolicyMSPerMB;
39 assert(_max_interval >= 0,"Sanity check");
40 }
41
42 // The oop passed in is the SoftReference object, and not
43 // the object the SoftReference points to.
44 bool LRUCurrentHeapPolicy::should_clear_reference(oop p,
45 jlong timestamp_clock) {
46 jlong interval = timestamp_clock - java_lang_ref_SoftReference::timestamp(p);
47 assert(interval >= 0, "Sanity check");
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