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src/share/vm/gc/g1/g1IHOPControl.cpp

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rev 9416 : dihop-changes
rev 9417 : imported patch sihop-thomas-review
rev 9418 : imported patch erik-jmasa-review
rev 9419 : [mq]: fix-evac-failure-needs-stats


  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/g1/g1CollectedHeap.inline.hpp"
  27 #include "gc/g1/g1ErgoVerbose.hpp"
  28 #include "gc/g1/g1IHOPControl.hpp"
  29 
  30 G1IHOPControl::G1IHOPControl(double initial_ihop_percent, size_t target_occupancy) :
  31   _initial_ihop_percent(initial_ihop_percent),
  32   _target_occupancy(target_occupancy) {



  33   assert(_initial_ihop_percent >= 0.0 && _initial_ihop_percent <= 100.0, "Initial IHOP value must be between 0 and 100 but is %.3f", initial_ihop_percent);
  34 }
  35 
  36 G1StaticIHOPControl::G1StaticIHOPControl(double ihop_percent, size_t target_occupancy) :
  37   G1IHOPControl(ihop_percent, target_occupancy),
  38   _last_allocation_time_s(0.0),
  39   _last_allocated_bytes(0),
  40   _last_marking_length_s(0.0) {
  41   assert(_target_occupancy > 0, "Target occupancy must be larger than zero.");
  42 }
  43 
  44 void G1StaticIHOPControl::print() {

  45   ergo_verbose6(ErgoIHOP,
  46                 "basic information",
  47                 ergo_format_reason("value update")
  48                 ergo_format_byte_perc("threshold")
  49                 ergo_format_byte("target occupancy")
  50                 ergo_format_byte("current occupancy")
  51                 ergo_format_double("recent old gen allocation rate")
  52                 ergo_format_ms("recent marking phase length"),
  53                 get_conc_mark_start_threshold(),
  54                 _initial_ihop_percent,
  55                 _target_occupancy,
  56                 G1CollectedHeap::heap()->used(),
  57                 _last_allocation_time_s > 0.0 ? _last_allocated_bytes / _last_allocation_time_s : 0.0,
  58                 _last_marking_length_s * 1000.0);






  59 }
  60 
  61 #ifndef PRODUCT
  62 static void test_update(G1IHOPControl* ctrl, double alloc_time, size_t alloc_amount, size_t young_size, double mark_time) {
  63   for (int i = 0; i < 100; i++) {
  64     ctrl->update_allocation_info(alloc_time, alloc_amount, young_size);
  65     ctrl->update_marking_length(mark_time);
  66   }
  67 }
  68 
  69 void G1StaticIHOPControl::test() {
  70   size_t const initial_ihop = 45;
  71 
  72   G1StaticIHOPControl ctrl(initial_ihop, 100);
  73   size_t threshold;
  74   
  75   threshold = ctrl.get_conc_mark_start_threshold();
  76   assert(threshold == initial_ihop,
  77          "Expected IHOP threshold of " SIZE_FORMAT " but is " SIZE_FORMAT, initial_ihop, threshold);
  78 




  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/g1/g1CollectedHeap.inline.hpp"
  27 #include "gc/g1/g1ErgoVerbose.hpp"
  28 #include "gc/g1/g1IHOPControl.hpp"
  29 
  30 G1IHOPControl::G1IHOPControl(double initial_ihop_percent, size_t target_occupancy) :
  31   _initial_ihop_percent(initial_ihop_percent),
  32   _target_occupancy(target_occupancy),
  33   _last_allocated_bytes(0),
  34   _last_allocation_time_s(0.0)
  35 {
  36   assert(_initial_ihop_percent >= 0.0 && _initial_ihop_percent <= 100.0, "Initial IHOP value must be between 0 and 100 but is %.3f", initial_ihop_percent);
  37 }
  38 
  39 void G1IHOPControl::update_allocation_info(double allocation_time_s, size_t allocated_bytes, size_t additional_buffer_size) {
  40   assert(allocation_time_s >= 0.0, "Allocation time must be positive but is %.3f", allocation_time_s);
  41 
  42   _last_allocation_time_s = allocation_time_s;
  43   _last_allocated_bytes = allocated_bytes;

  44 }
  45 
  46 void G1IHOPControl::print() {
  47   size_t cur_conc_mark_start_threshold = get_conc_mark_start_threshold();
  48   ergo_verbose6(ErgoIHOP,
  49                 "basic information",
  50                 ergo_format_reason("value update")
  51                 ergo_format_byte_perc("threshold")
  52                 ergo_format_byte("target occupancy")
  53                 ergo_format_byte("current occupancy")
  54                 ergo_format_double("recent old gen allocation rate")
  55                 ergo_format_double("recent marking phase length"),
  56                 cur_conc_mark_start_threshold,
  57                 cur_conc_mark_start_threshold * 100.0 / _target_occupancy,
  58                 _target_occupancy,
  59                 G1CollectedHeap::heap()->used(),
  60                 _last_allocation_time_s > 0.0 ? _last_allocated_bytes / _last_allocation_time_s : 0.0,
  61                 last_marking_length_s());
  62 }
  63 
  64 G1StaticIHOPControl::G1StaticIHOPControl(double ihop_percent, size_t target_occupancy) :
  65   G1IHOPControl(ihop_percent, target_occupancy),
  66   _last_marking_length_s(0.0) {
  67   assert(_target_occupancy > 0, "Target occupancy must be larger than zero.");
  68 }
  69 
  70 #ifndef PRODUCT
  71 static void test_update(G1IHOPControl* ctrl, double alloc_time, size_t alloc_amount, size_t young_size, double mark_time) {
  72   for (int i = 0; i < 100; i++) {
  73     ctrl->update_allocation_info(alloc_time, alloc_amount, young_size);
  74     ctrl->update_marking_length(mark_time);
  75   }
  76 }
  77 
  78 void G1StaticIHOPControl::test() {
  79   size_t const initial_ihop = 45;
  80 
  81   G1StaticIHOPControl ctrl(initial_ihop, 100);
  82   size_t threshold;
  83   
  84   threshold = ctrl.get_conc_mark_start_threshold();
  85   assert(threshold == initial_ihop,
  86          "Expected IHOP threshold of " SIZE_FORMAT " but is " SIZE_FORMAT, initial_ihop, threshold);
  87 


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