Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciCallProfile.hpp @ 10992:b9d151496930
8016556: G1: Use ArrayAllocator for BitMaps
Reviewed-by: tschatzl, dholmes, coleenp, johnc
author | brutisso |
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date | Tue, 18 Jun 2013 22:45:32 +0200 |
parents | c26de9aef2ed |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_CI_CICALLPROFILE_HPP |
26 #define SHARE_VM_CI_CICALLPROFILE_HPP | |
27 | |
28 #include "ci/ciClassList.hpp" | |
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29 #include "memory/allocation.hpp" |
1972 | 30 |
0 | 31 // ciCallProfile |
32 // | |
33 // This class is used to determine the frequently called method | |
34 // at some call site | |
35 class ciCallProfile : StackObj { | |
36 private: | |
37 // Fields are initialized directly by ciMethod::call_profile_at_bci. | |
38 friend class ciMethod; | |
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39 friend class ciMethodHandle; |
0 | 40 |
41 enum { MorphismLimit = 2 }; // Max call site's morphism we care about | |
42 int _limit; // number of receivers have been determined | |
43 int _morphism; // determined call site's morphism | |
44 int _count; // # times has this call been executed | |
45 int _receiver_count[MorphismLimit + 1]; // # times receivers have been seen | |
46 ciMethod* _method[MorphismLimit + 1]; // receivers methods | |
47 ciKlass* _receiver[MorphismLimit + 1]; // receivers (exact) | |
48 | |
49 ciCallProfile() { | |
50 _limit = 0; | |
51 _morphism = 0; | |
52 _count = -1; | |
53 _receiver_count[0] = -1; | |
54 _method[0] = NULL; | |
55 _receiver[0] = NULL; | |
56 } | |
57 | |
58 void add_receiver(ciKlass* receiver, int receiver_count); | |
59 | |
60 public: | |
61 // Note: The following predicates return false for invalid profiles: | |
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62 bool has_receiver(int i) const { return _limit > i; } |
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63 int morphism() const { return _morphism; } |
0 | 64 |
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65 int count() const { return _count; } |
0 | 66 int receiver_count(int i) { |
67 assert(i < _limit, "out of Call Profile MorphismLimit"); | |
68 return _receiver_count[i]; | |
69 } | |
70 float receiver_prob(int i) { | |
71 assert(i < _limit, "out of Call Profile MorphismLimit"); | |
72 return (float)_receiver_count[i]/(float)_count; | |
73 } | |
74 ciMethod* method(int i) { | |
75 assert(i < _limit, "out of Call Profile MorphismLimit"); | |
76 return _method[i]; | |
77 } | |
78 ciKlass* receiver(int i) { | |
79 assert(i < _limit, "out of Call Profile MorphismLimit"); | |
80 return _receiver[i]; | |
81 } | |
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82 |
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83 // Rescale the current profile based on the incoming scale |
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84 ciCallProfile rescale(double scale) { |
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85 assert(scale >= 0 && scale <= 1.0, "out of range"); |
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86 ciCallProfile call = *this; |
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87 call._count = (int)(call._count * scale); |
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88 for (int i = 0; i < _morphism; i++) { |
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89 call._receiver_count[i] = (int)(call._receiver_count[i] * scale); |
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90 } |
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91 return call; |
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92 } |
0 | 93 }; |
1972 | 94 |
95 #endif // SHARE_VM_CI_CICALLPROFILE_HPP |