jdk8-mips64-public/hotspot: src/share/vm/runtime/aprofiler.hpp@7ee622712fcf

6666698: EnableBiasedLocking with BiasedLockingStartupDelay can block Watcher thread
Summary: Enqueue VM_EnableBiasedLocking operation asynchronously
Reviewed-by: never, xlu, kbr, acorn

     1 /*

     2  * Copyright 1997-2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    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.

    34 class AllocationProfiler: AllStatic {

    35   friend class GenCollectedHeap;

    36   friend class MarkSweep;

    37  private:

    38   static bool _active;                          // tells whether profiler is active

    39   static GrowableArray<klassOop>* _print_array; // temporary array for printing

    41   // Utility printing functions

    42   static void add_class_to_array(klassOop k);

    43   static void add_classes_to_array(klassOop k);

    44   static int  compare_classes(klassOop* k1, klassOop* k2);

    45   static int  average(size_t alloc_size, int alloc_count);

    46   static void sort_and_print_array(size_t cutoff);

    48   // Call for collecting allocation information. Called at scavenge, mark-sweep and disengage.

    49   static void iterate_since_last_gc();

    51  public:

    52   // Start profiler

    53   static void engage();

    54   // Stop profiler

    55   static void disengage();

    56   // Tells whether profiler is active

    57   static bool is_active()                   { return _active; }

    58   // Print profile

    59   static void print(size_t cutoff);   // Cutoff in total allocation size (in words)

    60 };

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

src/share/vm/runtime/aprofiler.hpp@7ee622712fcf

src/share/vm/runtime/aprofiler.hpp