annotate src/share/vm/runtime/aprofiler.hpp @ 3602:da91efe96a93

6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents f95d63e2154a
children
rev   line source
duke@0 1 /*
coleenp@3602 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
trims@1472 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1472 20 * or visit www.oracle.com if you need additional information or have any
trims@1472 21 * questions.
duke@0 22 *
duke@0 23 */
duke@0 24
stefank@1879 25 #ifndef SHARE_VM_RUNTIME_APROFILER_HPP
stefank@1879 26 #define SHARE_VM_RUNTIME_APROFILER_HPP
stefank@1879 27
stefank@1879 28 #include "memory/allocation.hpp"
stefank@1879 29 #include "memory/universe.hpp"
stefank@1879 30 #include "oops/klass.hpp"
stefank@1879 31 #include "utilities/top.hpp"
stefank@1879 32
duke@0 33 // A simple allocation profiler for Java. The profiler collects and prints
duke@0 34 // the number and total size of instances allocated per class, including
duke@0 35 // array classes.
duke@0 36 //
duke@0 37 // The profiler is currently global for all threads. It can be changed to a
duke@0 38 // per threads profiler by keeping a more elaborate data structure and calling
duke@0 39 // iterate_since_last_scavenge at thread switches.
duke@0 40
duke@0 41
duke@0 42 class AllocationProfiler: AllStatic {
duke@0 43 friend class GenCollectedHeap;
ysr@342 44 friend class G1CollectedHeap;
duke@0 45 friend class MarkSweep;
duke@0 46 private:
duke@0 47 static bool _active; // tells whether profiler is active
coleenp@3602 48 static GrowableArray<Klass*>* _print_array; // temporary array for printing
duke@0 49
duke@0 50 // Utility printing functions
coleenp@3602 51 static void add_class_to_array(Klass* k);
coleenp@3602 52 static void add_classes_to_array(Klass* k);
coleenp@3602 53 static int compare_classes(Klass** k1, Klass** k2);
duke@0 54 static int average(size_t alloc_size, int alloc_count);
duke@0 55 static void sort_and_print_array(size_t cutoff);
duke@0 56
duke@0 57 // Call for collecting allocation information. Called at scavenge, mark-sweep and disengage.
duke@0 58 static void iterate_since_last_gc();
duke@0 59
duke@0 60 public:
duke@0 61 // Start profiler
duke@0 62 static void engage();
duke@0 63 // Stop profiler
duke@0 64 static void disengage();
duke@0 65 // Tells whether profiler is active
duke@0 66 static bool is_active() { return _active; }
duke@0 67 // Print profile
duke@0 68 static void print(size_t cutoff); // Cutoff in total allocation size (in words)
duke@0 69 };
stefank@1879 70
stefank@1879 71 #endif // SHARE_VM_RUNTIME_APROFILER_HPP