jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/ageTable.hpp@b985cbb00e68

8223147: JFR Backport
8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling
8202835: jfr/event/os/TestSystemProcess.java fails on missing events
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens

     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  */

    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP

    28 #include "oops/markOop.hpp"

    29 #include "oops/oop.hpp"

    30 #include "gc_implementation/shared/gcTrace.hpp"

    31 #include "runtime/perfData.hpp"

    33 /* Copyright (c) 1992-2009 Oracle and/or its affiliates, and Stanford University.

    34    See the LICENSE file for license information. */

    36 // Age table for adaptive feedback-mediated tenuring (scavenging)

    37 //

    38 // Note: all sizes are in oops

    40 class ageTable VALUE_OBJ_CLASS_SPEC {

    41   friend class VMStructs;

    43  public:

    44   // constants

    45   enum { table_size = markOopDesc::max_age + 1 };

    47   // instance variables

    48   size_t sizes[table_size];

    50   // constructor.  "global" indicates that this is the global age table

    51   // (as opposed to gc-thread-local)

    52   ageTable(bool global = true);

    54   // clear table

    55   void clear();

    57   // add entry

    58   void add(oop p, size_t oop_size) {

    59     add(p->age(), oop_size);

    60   }

    62   void add(uint age, size_t oop_size) {

    63     assert(age > 0 && age < table_size, "invalid age of object");

    64     sizes[age] += oop_size;

    65   }

    67   // Merge another age table with the current one.  Used

    68   // for parallel young generation gc.

    69   void merge(ageTable* subTable);

    70   void merge_par(ageTable* subTable);

    72   // calculate new tenuring threshold based on age information

    73   uint compute_tenuring_threshold(size_t survivor_capacity, GCTracer &tracer);

    75  private:

    76   PerfVariable* _perf_sizes[table_size];

    77 };

    79 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP

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

src/share/vm/gc_implementation/shared/ageTable.hpp@b985cbb00e68

src/share/vm/gc_implementation/shared/ageTable.hpp