1 /*
2 * Copyright (c) 1997, 2003, 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 // 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;
36 friend class G1CollectedHeap;
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 };
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1 /*
2 * Copyright (c) 1997, 2010, 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 #ifndef SHARE_VM_RUNTIME_APROFILER_HPP
26 #define SHARE_VM_RUNTIME_APROFILER_HPP
27
28 #include "memory/allocation.hpp"
29 #include "memory/universe.hpp"
30 #include "oops/klass.hpp"
31 #include "oops/klassOop.hpp"
32 #include "utilities/top.hpp"
33
34 // A simple allocation profiler for Java. The profiler collects and prints
35 // the number and total size of instances allocated per class, including
36 // array classes.
37 //
38 // The profiler is currently global for all threads. It can be changed to a
39 // per threads profiler by keeping a more elaborate data structure and calling
40 // iterate_since_last_scavenge at thread switches.
41
42
43 class AllocationProfiler: AllStatic {
44 friend class GenCollectedHeap;
45 friend class G1CollectedHeap;
46 friend class MarkSweep;
47 private:
48 static bool _active; // tells whether profiler is active
49 static GrowableArray<klassOop>* _print_array; // temporary array for printing
50
51 // Utility printing functions
52 static void add_class_to_array(klassOop k);
53 static void add_classes_to_array(klassOop k);
54 static int compare_classes(klassOop* k1, klassOop* k2);
55 static int average(size_t alloc_size, int alloc_count);
56 static void sort_and_print_array(size_t cutoff);
57
58 // Call for collecting allocation information. Called at scavenge, mark-sweep and disengage.
59 static void iterate_since_last_gc();
60
61 public:
62 // Start profiler
63 static void engage();
64 // Stop profiler
65 static void disengage();
66 // Tells whether profiler is active
67 static bool is_active() { return _active; }
68 // Print profile
69 static void print(size_t cutoff); // Cutoff in total allocation size (in words)
70 };
71
72 #endif // SHARE_VM_RUNTIME_APROFILER_HPP
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