Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/share/vm/runtime/aprofiler.hpp	Sat Dec 01 00:00:00 2007 +0000
     1.3 @@ -0,0 +1,60 @@
     1.4 +/*
     1.5 + * Copyright 1997-2003 Sun Microsystems, Inc.  All Rights Reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
    1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
    1.24 + * have any questions.
    1.25 + *
    1.26 + */
    1.27 +
    1.28 +// A simple allocation profiler for Java. The profiler collects and prints
    1.29 +// the number and total size of instances allocated per class, including
    1.30 +// array classes.
    1.31 +//
    1.32 +// The profiler is currently global for all threads. It can be changed to a
    1.33 +// per threads profiler by keeping a more elaborate data structure and calling
    1.34 +// iterate_since_last_scavenge at thread switches.
    1.35 +
    1.36 +
    1.37 +class AllocationProfiler: AllStatic {
    1.38 +  friend class GenCollectedHeap;
    1.39 +  friend class MarkSweep;
    1.40 + private:
    1.41 +  static bool _active;                          // tells whether profiler is active
    1.42 +  static GrowableArray<klassOop>* _print_array; // temporary array for printing
    1.43 +
    1.44 +  // Utility printing functions
    1.45 +  static void add_class_to_array(klassOop k);
    1.46 +  static void add_classes_to_array(klassOop k);
    1.47 +  static int  compare_classes(klassOop* k1, klassOop* k2);
    1.48 +  static int  average(size_t alloc_size, int alloc_count);
    1.49 +  static void sort_and_print_array(size_t cutoff);
    1.50 +
    1.51 +  // Call for collecting allocation information. Called at scavenge, mark-sweep and disengage.
    1.52 +  static void iterate_since_last_gc();
    1.53 +
    1.54 + public:
    1.55 +  // Start profiler
    1.56 +  static void engage();
    1.57 +  // Stop profiler
    1.58 +  static void disengage();
    1.59 +  // Tells whether profiler is active
    1.60 +  static bool is_active()                   { return _active; }
    1.61 +  // Print profile
    1.62 +  static void print(size_t cutoff);   // Cutoff in total allocation size (in words)
    1.63 +};