jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/concurrentMarkSweep/cmsGCAdaptivePolicyCounters.hpp@c96030fff130

6684579: SoftReference processing can be made more efficient
Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa

     1 /*

     2  * Copyright 2004-2005 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 // CMSGCAdaptivePolicyCounters is a holder class for performance counters

    26 // that track the data and decisions for the ergonomics policy for the

    27 // concurrent mark sweep collector

    29 class CMSGCAdaptivePolicyCounters : public GCAdaptivePolicyCounters {

    30   friend class VMStructs;

    32  private:

    34   // Capacity of tenured generation recorded at the end of

    35   // any collection.

    36   PerfVariable* _cms_capacity_counter; // Make this common with PS _old_capacity

    38   // Average stop-the-world pause time for both initial and

    39   // remark pauses sampled at the end of the checkpointRootsFinalWork.

    40   PerfVariable* _avg_cms_STW_time_counter;

    41   // Average stop-the-world (STW) GC cost for the STW pause time

    42   // _avg_cms_STW_time_counter.

    43   PerfVariable* _avg_cms_STW_gc_cost_counter;

    45 #ifdef NOT_PRODUCT

    46   // These are useful to see how the most recent values of these

    47   // counters compare to their respective averages but

    48   // do not control behavior.

    49   PerfVariable* _initial_pause_counter;

    50   PerfVariable* _remark_pause_counter;

    51 #endif

    53   // Average of the initial marking pause for a concurrent collection.

    54   PerfVariable* _avg_initial_pause_counter;

    55   // Average of the remark pause for a concurrent collection.

    56   PerfVariable* _avg_remark_pause_counter;

    58   // Average for the sum of all the concurrent times per collection.

    59   PerfVariable* _avg_concurrent_time_counter;

    60   // Average for the time between the most recent end of a

    61   // concurrent collection and the beginning of the next

    62   // concurrent collection.

    63   PerfVariable* _avg_concurrent_interval_counter;

    64   // Average of the concurrent GC costs based on _avg_concurrent_time_counter

    65   // and _avg_concurrent_interval_counter.

    66   PerfVariable* _avg_concurrent_gc_cost_counter;

    68   // Average of the free space in the tenured generation at the

    69   // end of the sweep of the tenured generation.

    70   PerfVariable* _avg_cms_free_counter;

    71   // Average of the free space in the tenured generation at the

    72   // start of the sweep of the tenured genertion.

    73   PerfVariable* _avg_cms_free_at_sweep_counter;

    74   // Average of the free space in the tenured generation at the

    75   // after any resizing of the tenured generation at the end

    76   // of a collection of the tenured generation.

    77   PerfVariable* _avg_cms_promo_counter;

    79   // Average of  the mark-sweep-compact (MSC) pause time for a collection

    80   // of the tenured generation.

    81   PerfVariable* _avg_msc_pause_counter;

    82   // Average for the time between the most recent end of a

    83   // MSC collection and the beginning of the next

    84   // MSC collection.

    85   PerfVariable* _avg_msc_interval_counter;

    86   // Average for the GC cost of a MSC collection based on

    87   // _avg_msc_pause_counter and _avg_msc_interval_counter.

    88   PerfVariable* _msc_gc_cost_counter;

    90   // Average of  the mark-sweep (MS) pause time for a collection

    91   // of the tenured generation.

    92   PerfVariable* _avg_ms_pause_counter;

    93   // Average for the time between the most recent end of a

    94   // MS collection and the beginning of the next

    95   // MS collection.

    96   PerfVariable* _avg_ms_interval_counter;

    97   // Average for the GC cost of a MS collection based on

    98   // _avg_ms_pause_counter and _avg_ms_interval_counter.

    99   PerfVariable* _ms_gc_cost_counter;

   101   // Average of the bytes promoted per minor collection.

   102   PerfVariable* _promoted_avg_counter;

   103   // Average of the deviation of the promoted average

   104   PerfVariable* _promoted_avg_dev_counter;

   105   // Padded average of the bytes promoted per minor colleciton

   106   PerfVariable* _promoted_padded_avg_counter;

   108   // See description of the _change_young_gen_for_maj_pauses

   109   // variable recently in cmsAdaptiveSizePolicy.hpp.

   110   PerfVariable* _change_young_gen_for_maj_pauses_counter;

   112   // See descriptions of _remark_pause_old_slope, _initial_pause_old_slope,

   113   // etc. variables recently in cmsAdaptiveSizePolicy.hpp.

   114   PerfVariable* _remark_pause_old_slope_counter;

   115   PerfVariable* _initial_pause_old_slope_counter;

   116   PerfVariable* _remark_pause_young_slope_counter;

   117   PerfVariable* _initial_pause_young_slope_counter;

   119   CMSAdaptiveSizePolicy* cms_size_policy() {

   120     assert(_size_policy->kind() ==

   121       AdaptiveSizePolicy::_gc_cms_adaptive_size_policy,

   122       "Wrong size policy");

   123     return (CMSAdaptiveSizePolicy*)_size_policy;

   124   }

   126   inline void update_avg_cms_STW_time_counter() {

   127     _avg_cms_STW_time_counter->set_value(

   128       (jlong) (cms_size_policy()->avg_cms_STW_time()->average() *

   129       (double) MILLIUNITS));

   130   }

   132   inline void update_avg_cms_STW_gc_cost_counter() {

   133     _avg_cms_STW_gc_cost_counter->set_value(

   134       (jlong) (cms_size_policy()->avg_cms_STW_gc_cost()->average() * 100.0));

   135   }

   137   inline void update_avg_initial_pause_counter() {

   138     _avg_initial_pause_counter->set_value(

   139       (jlong) (cms_size_policy()->avg_initial_pause()->average() *

   140       (double) MILLIUNITS));

   141   }

   142 #ifdef NOT_PRODUCT

   143   inline void update_avg_remark_pause_counter() {

   144     _avg_remark_pause_counter->set_value(

   145       (jlong) (cms_size_policy()-> avg_remark_pause()->average() *

   146       (double) MILLIUNITS));

   147   }

   149   inline void update_initial_pause_counter() {

   150     _initial_pause_counter->set_value(

   151       (jlong) (cms_size_policy()->avg_initial_pause()->average() *

   152       (double) MILLIUNITS));

   153   }

   154 #endif

   155   inline void update_remark_pause_counter() {

   156     _remark_pause_counter->set_value(

   157       (jlong) (cms_size_policy()-> avg_remark_pause()->last_sample() *

   158       (double) MILLIUNITS));

   159   }

   161   inline void update_avg_concurrent_time_counter() {

   162     _avg_concurrent_time_counter->set_value(

   163       (jlong) (cms_size_policy()->avg_concurrent_time()->last_sample() *

   164       (double) MILLIUNITS));

   165   }

   167   inline void update_avg_concurrent_interval_counter() {

   168     _avg_concurrent_interval_counter->set_value(

   169       (jlong) (cms_size_policy()->avg_concurrent_interval()->average() *

   170       (double) MILLIUNITS));

   171   }

   173   inline void update_avg_concurrent_gc_cost_counter() {

   174     _avg_concurrent_gc_cost_counter->set_value(

   175       (jlong) (cms_size_policy()->avg_concurrent_gc_cost()->average() * 100.0));

   176   }

   178   inline void update_avg_cms_free_counter() {

   179     _avg_cms_free_counter->set_value(

   180       (jlong) cms_size_policy()->avg_cms_free()->average());

   181   }

   183   inline void update_avg_cms_free_at_sweep_counter() {

   184     _avg_cms_free_at_sweep_counter->set_value(

   185       (jlong) cms_size_policy()->avg_cms_free_at_sweep()->average());

   186   }

   188   inline void update_avg_cms_promo_counter() {

   189     _avg_cms_promo_counter->set_value(

   190       (jlong) cms_size_policy()->avg_cms_promo()->average());

   191   }

   193   inline void update_avg_old_live_counter() {

   194     _avg_old_live_counter->set_value(

   195       (jlong)(cms_size_policy()->avg_old_live()->average())

   196     );

   197   }

   199   inline void update_avg_msc_pause_counter() {

   200     _avg_msc_pause_counter->set_value(

   201       (jlong) (cms_size_policy()->avg_msc_pause()->average() *

   202       (double) MILLIUNITS));

   203   }

   205   inline void update_avg_msc_interval_counter() {

   206     _avg_msc_interval_counter->set_value(

   207       (jlong) (cms_size_policy()->avg_msc_interval()->average() *

   208       (double) MILLIUNITS));

   209   }

   211   inline void update_msc_gc_cost_counter() {

   212     _msc_gc_cost_counter->set_value(

   213       (jlong) (cms_size_policy()->avg_msc_gc_cost()->average() * 100.0));

   214   }

   216   inline void update_avg_ms_pause_counter() {

   217     _avg_ms_pause_counter->set_value(

   218       (jlong) (cms_size_policy()->avg_ms_pause()->average() *

   219       (double) MILLIUNITS));

   220   }

   222   inline void update_avg_ms_interval_counter() {

   223     _avg_ms_interval_counter->set_value(

   224       (jlong) (cms_size_policy()->avg_ms_interval()->average() *

   225       (double) MILLIUNITS));

   226   }

   228   inline void update_ms_gc_cost_counter() {

   229     _ms_gc_cost_counter->set_value(

   230       (jlong) (cms_size_policy()->avg_ms_gc_cost()->average() * 100.0));

   231   }

   233   inline void update_major_gc_cost_counter() {

   234     _major_gc_cost_counter->set_value(

   235       (jlong)(cms_size_policy()->cms_gc_cost() * 100.0)

   236     );

   237   }

   238   inline void update_mutator_cost_counter() {

   239     _mutator_cost_counter->set_value(

   240       (jlong)(cms_size_policy()->mutator_cost() * 100.0)

   241     );

   242   }

   244   inline void update_avg_promoted_avg(CMSGCStats* gc_stats) {

   245     _promoted_avg_counter->set_value(

   246       (jlong)(gc_stats->avg_promoted()->average())

   247     );

   248   }

   249   inline void update_avg_promoted_dev(CMSGCStats* gc_stats) {

   250     _promoted_avg_dev_counter->set_value(

   251       (jlong)(gc_stats->avg_promoted()->deviation())

   252     );

   253   }

   254   inline void update_avg_promoted_padded_avg(CMSGCStats* gc_stats) {

   255     _promoted_padded_avg_counter->set_value(

   256       (jlong)(gc_stats->avg_promoted()->padded_average())

   257     );

   258   }

   259   inline void update_remark_pause_old_slope_counter() {

   260     _remark_pause_old_slope_counter->set_value(

   261       (jlong)(cms_size_policy()->remark_pause_old_slope() * 1000)

   262     );

   263   }

   264   inline void update_initial_pause_old_slope_counter() {

   265     _initial_pause_old_slope_counter->set_value(

   266       (jlong)(cms_size_policy()->initial_pause_old_slope() * 1000)

   267     );

   268   }

   269   inline void update_remark_pause_young_slope_counter() {

   270     _remark_pause_young_slope_counter->set_value(

   271       (jlong)(cms_size_policy()->remark_pause_young_slope() * 1000)

   272     );

   273   }

   274   inline void update_initial_pause_young_slope_counter() {

   275     _initial_pause_young_slope_counter->set_value(

   276       (jlong)(cms_size_policy()->initial_pause_young_slope() * 1000)

   277     );

   278   }

   279   inline void update_change_young_gen_for_maj_pauses() {

   280     _change_young_gen_for_maj_pauses_counter->set_value(

   281       cms_size_policy()->change_young_gen_for_maj_pauses());

   282   }

   284  public:

   285   CMSGCAdaptivePolicyCounters(const char* name, int collectors, int generations,

   286                               AdaptiveSizePolicy* size_policy);

   288   // update counters

   289   void update_counters();

   290   void update_counters(CMSGCStats* gc_stats);

   291   void update_counters_from_policy();

   293   inline void update_cms_capacity_counter(size_t size_in_bytes) {

   294     _cms_capacity_counter->set_value(size_in_bytes);

   295   }

   297   virtual GCPolicyCounters::Name kind() const {

   298     return GCPolicyCounters::CMSGCAdaptivePolicyCountersKind;

   299   }

   300 };

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

src/share/vm/gc_implementation/concurrentMarkSweep/cmsGCAdaptivePolicyCounters.hpp@c96030fff130

src/share/vm/gc_implementation/concurrentMarkSweep/cmsGCAdaptivePolicyCounters.hpp