Mercurial > hg > truffle
annotate src/share/vm/memory/referencePolicy.cpp @ 989:148e5441d916
6863023: need non-perm oops in code cache for JSR 292
Summary: Make a special root-list for those few nmethods which might contain non-perm oops.
Reviewed-by: twisti, kvn, never, jmasa, ysr
| author | jrose |
|---|---|
| date | Tue, 15 Sep 2009 21:53:47 -0700 |
| parents | ad8c8ca4ab0f |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 470 | 2 * Copyright 2000-2008 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_referencePolicy.cpp.incl" | |
| 27 | |
| 28 LRUCurrentHeapPolicy::LRUCurrentHeapPolicy() { | |
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29 setup(); |
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30 } |
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31 |
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32 // Capture state (of-the-VM) information needed to evaluate the policy |
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33 void LRUCurrentHeapPolicy::setup() { |
| 0 | 34 _max_interval = (Universe::get_heap_free_at_last_gc() / M) * SoftRefLRUPolicyMSPerMB; |
| 35 assert(_max_interval >= 0,"Sanity check"); | |
| 36 } | |
| 37 | |
| 38 // The oop passed in is the SoftReference object, and not | |
| 39 // the object the SoftReference points to. | |
| 40 bool LRUCurrentHeapPolicy::should_clear_reference(oop p) { | |
| 41 jlong interval = java_lang_ref_SoftReference::clock() - java_lang_ref_SoftReference::timestamp(p); | |
| 42 assert(interval >= 0, "Sanity check"); | |
| 43 | |
| 44 // The interval will be zero if the ref was accessed since the last scavenge/gc. | |
| 45 if(interval <= _max_interval) { | |
| 46 return false; | |
| 47 } | |
| 48 | |
| 49 return true; | |
| 50 } | |
| 51 | |
| 52 /////////////////////// MaxHeap ////////////////////// | |
| 53 | |
| 54 LRUMaxHeapPolicy::LRUMaxHeapPolicy() { | |
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55 setup(); |
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56 } |
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57 |
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58 // Capture state (of-the-VM) information needed to evaluate the policy |
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6778647: snap(), snap_policy() should be renamed setup(), setup_policy()
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59 void LRUMaxHeapPolicy::setup() { |
| 0 | 60 size_t max_heap = MaxHeapSize; |
| 61 max_heap -= Universe::get_heap_used_at_last_gc(); | |
| 62 max_heap /= M; | |
| 63 | |
| 64 _max_interval = max_heap * SoftRefLRUPolicyMSPerMB; | |
| 65 assert(_max_interval >= 0,"Sanity check"); | |
| 66 } | |
| 67 | |
| 68 // The oop passed in is the SoftReference object, and not | |
| 69 // the object the SoftReference points to. | |
| 70 bool LRUMaxHeapPolicy::should_clear_reference(oop p) { | |
| 71 jlong interval = java_lang_ref_SoftReference::clock() - java_lang_ref_SoftReference::timestamp(p); | |
| 72 assert(interval >= 0, "Sanity check"); | |
| 73 | |
| 74 // The interval will be zero if the ref was accessed since the last scavenge/gc. | |
| 75 if(interval <= _max_interval) { | |
| 76 return false; | |
| 77 } | |
| 78 | |
| 79 return true; | |
| 80 } |