Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/aprofiler.hpp @ 1777:179464550c7d
6983930: CMS: Various small cleanups ca September 2010
Summary: Fixed comment/documentation typos; converted some guarantee()s to assert()s.
Reviewed-by: jmasa
author | ysr |
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date | Fri, 10 Sep 2010 17:07:55 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2003, 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 | |
25 // A simple allocation profiler for Java. The profiler collects and prints | |
26 // the number and total size of instances allocated per class, including | |
27 // array classes. | |
28 // | |
29 // The profiler is currently global for all threads. It can be changed to a | |
30 // per threads profiler by keeping a more elaborate data structure and calling | |
31 // iterate_since_last_scavenge at thread switches. | |
32 | |
33 | |
34 class AllocationProfiler: AllStatic { | |
35 friend class GenCollectedHeap; | |
342 | 36 friend class G1CollectedHeap; |
0 | 37 friend class MarkSweep; |
38 private: | |
39 static bool _active; // tells whether profiler is active | |
40 static GrowableArray<klassOop>* _print_array; // temporary array for printing | |
41 | |
42 // Utility printing functions | |
43 static void add_class_to_array(klassOop k); | |
44 static void add_classes_to_array(klassOop k); | |
45 static int compare_classes(klassOop* k1, klassOop* k2); | |
46 static int average(size_t alloc_size, int alloc_count); | |
47 static void sort_and_print_array(size_t cutoff); | |
48 | |
49 // Call for collecting allocation information. Called at scavenge, mark-sweep and disengage. | |
50 static void iterate_since_last_gc(); | |
51 | |
52 public: | |
53 // Start profiler | |
54 static void engage(); | |
55 // Stop profiler | |
56 static void disengage(); | |
57 // Tells whether profiler is active | |
58 static bool is_active() { return _active; } | |
59 // Print profile | |
60 static void print(size_t cutoff); // Cutoff in total allocation size (in words) | |
61 }; |