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1 /* |
1 /* |
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * |
4 * |
5 * This code is free software; you can redistribute it and/or modify it |
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 |
6 * under the terms of the GNU General Public License version 2 only, as |
7 * published by the Free Software Foundation. |
7 * published by the Free Software Foundation. |
21 * questions. |
21 * questions. |
22 * |
22 * |
23 */ |
23 */ |
24 |
24 |
25 #include "precompiled.hpp" |
25 #include "precompiled.hpp" |
26 #include "classfile/javaClasses.hpp" |
26 #include "classfile/javaClasses.inline.hpp" |
27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
28 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
28 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
29 #include "gc_implementation/g1/g1StringDedup.hpp" |
29 #include "gc_implementation/g1/g1StringDedup.hpp" |
30 #include "gc_implementation/g1/g1StringDedupQueue.hpp" |
30 #include "gc_implementation/g1/g1StringDedupQueue.hpp" |
31 #include "gc_implementation/g1/g1StringDedupStat.hpp" |
31 #include "gc_implementation/g1/g1StringDedupStat.hpp" |
49 assert(is_enabled(), "String deduplication not enabled"); |
49 assert(is_enabled(), "String deduplication not enabled"); |
50 G1StringDedupThread::stop(); |
50 G1StringDedupThread::stop(); |
51 } |
51 } |
52 |
52 |
53 bool G1StringDedup::is_candidate_from_mark(oop obj) { |
53 bool G1StringDedup::is_candidate_from_mark(oop obj) { |
54 if (java_lang_String::is_instance(obj)) { |
54 if (java_lang_String::is_instance_inlined(obj)) { |
55 bool from_young = G1CollectedHeap::heap()->heap_region_containing_raw(obj)->is_young(); |
55 bool from_young = G1CollectedHeap::heap()->heap_region_containing_raw(obj)->is_young(); |
56 if (from_young && obj->age() < StringDeduplicationAgeThreshold) { |
56 if (from_young && obj->age() < StringDeduplicationAgeThreshold) { |
57 // Candidate found. String is being evacuated from young to old but has not |
57 // Candidate found. String is being evacuated from young to old but has not |
58 // reached the deduplication age threshold, i.e. has not previously been a |
58 // reached the deduplication age threshold, i.e. has not previously been a |
59 // candidate during its life in the young generation. |
59 // candidate during its life in the young generation. |
71 G1StringDedupQueue::push(0 /* worker_id */, java_string); |
71 G1StringDedupQueue::push(0 /* worker_id */, java_string); |
72 } |
72 } |
73 } |
73 } |
74 |
74 |
75 bool G1StringDedup::is_candidate_from_evacuation(bool from_young, bool to_young, oop obj) { |
75 bool G1StringDedup::is_candidate_from_evacuation(bool from_young, bool to_young, oop obj) { |
76 if (from_young && java_lang_String::is_instance(obj)) { |
76 if (from_young && java_lang_String::is_instance_inlined(obj)) { |
77 if (to_young && obj->age() == StringDeduplicationAgeThreshold) { |
77 if (to_young && obj->age() == StringDeduplicationAgeThreshold) { |
78 // Candidate found. String is being evacuated from young to young and just |
78 // Candidate found. String is being evacuated from young to young and just |
79 // reached the deduplication age threshold. |
79 // reached the deduplication age threshold. |
80 return true; |
80 return true; |
81 } |
81 } |