aprofiler.hpp revision 0
0N/A/*
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0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
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0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
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0N/A *
553N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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0N/A *
0N/A */
0N/A
0N/A// A simple allocation profiler for Java. The profiler collects and prints
0N/A// the number and total size of instances allocated per class, including
0N/A// array classes.
0N/A//
0N/A// The profiler is currently global for all threads. It can be changed to a
0N/A// per threads profiler by keeping a more elaborate data structure and calling
0N/A// iterate_since_last_scavenge at thread switches.
0N/A
0N/A
0N/Aclass AllocationProfiler: AllStatic {
0N/A friend class GenCollectedHeap;
610N/A friend class MarkSweep;
0N/A private:
610N/A static bool _active; // tells whether profiler is active
0N/A static GrowableArray<klassOop>* _print_array; // temporary array for printing
610N/A
0N/A // Utility printing functions
0N/A static void add_class_to_array(klassOop k);
0N/A static void add_classes_to_array(klassOop k);
0N/A static int compare_classes(klassOop* k1, klassOop* k2);
0N/A static int average(size_t alloc_size, int alloc_count);
0N/A static void sort_and_print_array(size_t cutoff);
0N/A
0N/A // Call for collecting allocation information. Called at scavenge, mark-sweep and disengage.
0N/A static void iterate_since_last_gc();
0N/A
0N/A public:
// Start profiler
static void engage();
// Stop profiler
static void disengage();
// Tells whether profiler is active
static bool is_active() { return _active; }
// Print profile
static void print(size_t cutoff); // Cutoff in total allocation size (in words)
};