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 #ifndef SHARE_VM_GC_PARALLEL_PSADAPTIVESIZEPOLICY_HPP
  26 #define SHARE_VM_GC_PARALLEL_PSADAPTIVESIZEPOLICY_HPP
  27 
  28 #include "gc/shared/adaptiveSizePolicy.hpp"
  29 #include "gc/shared/gcCause.hpp"
  30 #include "gc/shared/gcStats.hpp"
  31 #include "gc/shared/gcUtil.hpp"

  32 
  33 // This class keeps statistical information and computes the
  34 // optimal free space for both the young and old generation
  35 // based on current application characteristics (based on gc cost
  36 // and application footprint).
  37 //
  38 // It also computes an optimal tenuring threshold between the young
  39 // and old generations, so as to equalize the cost of collections
  40 // of those generations, as well as optimal survivor space sizes
  41 // for the young generation.
  42 //
  43 // While this class is specifically intended for a generational system
  44 // consisting of a young gen (containing an Eden and two semi-spaces)
  45 // and a tenured gen, as well as a perm gen for reflective data, it
  46 // makes NO references to specific generations.
  47 //
  48 // 05/02/2003 Update
  49 // The 1.5 policy makes use of data gathered for the costs of GC on
  50 // specific generations.  That data does reference specific
  51 // generation.  Also diagnostics specific to generations have

  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 #ifndef SHARE_VM_GC_PARALLEL_PSADAPTIVESIZEPOLICY_HPP
  26 #define SHARE_VM_GC_PARALLEL_PSADAPTIVESIZEPOLICY_HPP
  27 
  28 #include "gc/shared/adaptiveSizePolicy.hpp"
  29 #include "gc/shared/gcCause.hpp"
  30 #include "gc/shared/gcStats.hpp"
  31 #include "gc/shared/gcUtil.hpp"
  32 #include "utilities/align.hpp"
  33 
  34 // This class keeps statistical information and computes the
  35 // optimal free space for both the young and old generation
  36 // based on current application characteristics (based on gc cost
  37 // and application footprint).
  38 //
  39 // It also computes an optimal tenuring threshold between the young
  40 // and old generations, so as to equalize the cost of collections
  41 // of those generations, as well as optimal survivor space sizes
  42 // for the young generation.
  43 //
  44 // While this class is specifically intended for a generational system
  45 // consisting of a young gen (containing an Eden and two semi-spaces)
  46 // and a tenured gen, as well as a perm gen for reflective data, it
  47 // makes NO references to specific generations.
  48 //
  49 // 05/02/2003 Update
  50 // The 1.5 policy makes use of data gathered for the costs of GC on
  51 // specific generations.  That data does reference specific
  52 // generation.  Also diagnostics specific to generations have