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src/share/vm/gc/shared/adaptiveSizePolicy.cpp

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rev 8362 : [mq]: hotspot


   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  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc_implementation/shared/adaptiveSizePolicy.hpp"
  27 #include "gc_interface/gcCause.hpp"
  28 #include "memory/collectorPolicy.hpp"

  29 #include "runtime/timer.hpp"
  30 #include "utilities/ostream.hpp"
  31 #include "utilities/workgroup.hpp"
  32 elapsedTimer AdaptiveSizePolicy::_minor_timer;
  33 elapsedTimer AdaptiveSizePolicy::_major_timer;
  34 bool AdaptiveSizePolicy::_debug_perturbation = false;
  35 
  36 // The throughput goal is implemented as
  37 //      _throughput_goal = 1 - ( 1 / (1 + gc_cost_ratio))
  38 // gc_cost_ratio is the ratio
  39 //      application cost / gc cost
  40 // For example a gc_cost_ratio of 4 translates into a
  41 // throughput goal of .80
  42 
  43 AdaptiveSizePolicy::AdaptiveSizePolicy(size_t init_eden_size,
  44                                        size_t init_promo_size,
  45                                        size_t init_survivor_size,
  46                                        double gc_pause_goal_sec,
  47                                        uint gc_cost_ratio) :
  48     _eden_size(init_eden_size),
  49     _promo_size(init_promo_size),
  50     _survivor_size(init_survivor_size),
  51     _gc_pause_goal_sec(gc_pause_goal_sec),




   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  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc/shared/adaptiveSizePolicy.hpp"
  27 #include "gc/shared/collectorPolicy.hpp"
  28 #include "gc/shared/gcCause.hpp"
  29 #include "gc/shared/workgroup.hpp"
  30 #include "runtime/timer.hpp"
  31 #include "utilities/ostream.hpp"

  32 elapsedTimer AdaptiveSizePolicy::_minor_timer;
  33 elapsedTimer AdaptiveSizePolicy::_major_timer;
  34 bool AdaptiveSizePolicy::_debug_perturbation = false;
  35 
  36 // The throughput goal is implemented as
  37 //      _throughput_goal = 1 - ( 1 / (1 + gc_cost_ratio))
  38 // gc_cost_ratio is the ratio
  39 //      application cost / gc cost
  40 // For example a gc_cost_ratio of 4 translates into a
  41 // throughput goal of .80
  42 
  43 AdaptiveSizePolicy::AdaptiveSizePolicy(size_t init_eden_size,
  44                                        size_t init_promo_size,
  45                                        size_t init_survivor_size,
  46                                        double gc_pause_goal_sec,
  47                                        uint gc_cost_ratio) :
  48     _eden_size(init_eden_size),
  49     _promo_size(init_promo_size),
  50     _survivor_size(init_survivor_size),
  51     _gc_pause_goal_sec(gc_pause_goal_sec),


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