jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/ageTable.cpp@7426d8d76305

8034761: Remove the do_code_roots parameter from process_strong_roots
Reviewed-by: tschatzl, mgerdin, jmasa

     1 /*

     2  * Copyright (c) 1997, 2014, 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 #include "precompiled.hpp"

    26 #include "gc_implementation/shared/ageTable.hpp"

    27 #include "gc_implementation/shared/gcPolicyCounters.hpp"

    28 #include "memory/collectorPolicy.hpp"

    29 #include "memory/resourceArea.hpp"

    30 #include "memory/sharedHeap.hpp"

    31 #include "utilities/copy.hpp"

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

    34    See the LICENSE file for license information. */

    36 ageTable::ageTable(bool global) {

    38   clear();

    40   if (UsePerfData && global) {

    42     ResourceMark rm;

    43     EXCEPTION_MARK;

    45     const char* agetable_ns = "generation.0.agetable";

    46     const char* bytes_ns = PerfDataManager::name_space(agetable_ns, "bytes");

    48     for(int age = 0; age < table_size; age ++) {

    49       char age_name[10];

    50       jio_snprintf(age_name, sizeof(age_name), "%2.2d", age);

    51       const char* cname = PerfDataManager::counter_name(bytes_ns, age_name);

    52       _perf_sizes[age] = PerfDataManager::create_variable(SUN_GC, cname,

    53                                                           PerfData::U_Bytes,

    54                                                           CHECK);

    55     }

    57     const char* cname = PerfDataManager::counter_name(agetable_ns, "size");

    58     PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_None,

    59                                      table_size, CHECK);

    60   }

    61 }

    63 void ageTable::clear() {

    64   for (size_t* p = sizes; p < sizes + table_size; ++p) {

    65     *p = 0;

    66   }

    67 }

    69 void ageTable::merge(ageTable* subTable) {

    70   for (int i = 0; i < table_size; i++) {

    71     sizes[i]+= subTable->sizes[i];

    72   }

    73 }

    75 void ageTable::merge_par(ageTable* subTable) {

    76   for (int i = 0; i < table_size; i++) {

    77     Atomic::add_ptr(subTable->sizes[i], &sizes[i]);

    78   }

    79 }

    81 uint ageTable::compute_tenuring_threshold(size_t survivor_capacity) {

    82   size_t desired_survivor_size = (size_t)((((double) survivor_capacity)*TargetSurvivorRatio)/100);

    83   size_t total = 0;

    84   uint age = 1;

    85   assert(sizes[0] == 0, "no objects with age zero should be recorded");

    86   while (age < table_size) {

    87     total += sizes[age];

    88     // check if including objects of age 'age' made us pass the desired

    89     // size, if so 'age' is the new threshold

    90     if (total > desired_survivor_size) break;

    91     age++;

    92   }

    93   uint result = age < MaxTenuringThreshold ? age : MaxTenuringThreshold;

    95   if (PrintTenuringDistribution || UsePerfData) {

    97     if (PrintTenuringDistribution) {

    98       gclog_or_tty->cr();

    99       gclog_or_tty->print_cr("Desired survivor size " SIZE_FORMAT " bytes, new threshold %u (max %u)",

   100         desired_survivor_size*oopSize, result, (int) MaxTenuringThreshold);

   101     }

   103     total = 0;

   104     age = 1;

   105     while (age < table_size) {

   106       total += sizes[age];

   107       if (sizes[age] > 0) {

   108         if (PrintTenuringDistribution) {

   109           gclog_or_tty->print_cr("- age %3u: " SIZE_FORMAT_W(10) " bytes, " SIZE_FORMAT_W(10) " total",

   110                                         age,    sizes[age]*oopSize,          total*oopSize);

   111         }

   112       }

   113       if (UsePerfData) {

   114         _perf_sizes[age]->set_value(sizes[age]*oopSize);

   115       }

   116       age++;

   117     }

   118     if (UsePerfData) {

   119       SharedHeap* sh = SharedHeap::heap();

   120       CollectorPolicy* policy = sh->collector_policy();

   121       GCPolicyCounters* gc_counters = policy->counters();

   122       gc_counters->tenuring_threshold()->set_value(result);

   123       gc_counters->desired_survivor_size()->set_value(

   124         desired_survivor_size*oopSize);

   125     }

   126   }

   128   return result;

   129 }

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