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src/hotspot/share/gc/g1/g1_globals.hpp

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rev 49897 : [mq]: 8201491-precleaning


  62           range(0, 100)                                                     \
  63                                                                             \
  64   diagnostic(intx, G1SummarizeRSetStatsPeriod, 0,                           \
  65           "The period (in number of GCs) at which we will generate "        \
  66           "update buffer processing info "                                  \
  67           "(0 means do not periodically generate this info); "              \
  68           "it also requires that logging is enabled on the trace"           \
  69           "level for gc+remset")                                            \
  70           range(0, max_intx)                                                \
  71                                                                             \
  72   product(double, G1ConcMarkStepDurationMillis, 10.0,                       \
  73           "Target duration of individual concurrent marking steps "         \
  74           "in milliseconds.")                                               \
  75           range(1.0, DBL_MAX)                                               \
  76                                                                             \
  77   product(uint, G1RefProcDrainInterval, 1000,                               \
  78           "The number of discovered reference objects to process before "   \
  79           "draining concurrent marking work queues.")                       \
  80           range(1, INT_MAX)                                                 \
  81                                                                             \




  82   experimental(double, G1LastPLABAverageOccupancy, 50.0,                    \
  83                "The expected average occupancy of the last PLAB in "        \
  84                "percent.")                                                  \
  85                range(0.001, 100.0)                                          \
  86                                                                             \
  87   product(size_t, G1SATBBufferSize, 1*K,                                    \
  88           "Number of entries in an SATB log buffer.")                       \
  89           range(1, max_uintx)                                               \
  90                                                                             \
  91   develop(intx, G1SATBProcessCompletedThreshold, 20,                        \
  92           "Number of completed buffers that triggers log processing.")      \
  93           range(0, max_jint)                                                \
  94                                                                             \
  95   product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60,                \
  96           "Before enqueueing them, each mutator thread tries to do some "   \
  97           "filtering on the SATB buffers it generates. If post-filtering "  \
  98           "the percentage of retained entries is over this threshold "      \
  99           "the buffer will be enqueued for processing. A value of 0 "       \
 100           "specifies that mutator threads should not do such filtering.")   \
 101           range(0, 100)                                                     \




  62           range(0, 100)                                                     \
  63                                                                             \
  64   diagnostic(intx, G1SummarizeRSetStatsPeriod, 0,                           \
  65           "The period (in number of GCs) at which we will generate "        \
  66           "update buffer processing info "                                  \
  67           "(0 means do not periodically generate this info); "              \
  68           "it also requires that logging is enabled on the trace"           \
  69           "level for gc+remset")                                            \
  70           range(0, max_intx)                                                \
  71                                                                             \
  72   product(double, G1ConcMarkStepDurationMillis, 10.0,                       \
  73           "Target duration of individual concurrent marking steps "         \
  74           "in milliseconds.")                                               \
  75           range(1.0, DBL_MAX)                                               \
  76                                                                             \
  77   product(uint, G1RefProcDrainInterval, 1000,                               \
  78           "The number of discovered reference objects to process before "   \
  79           "draining concurrent marking work queues.")                       \
  80           range(1, INT_MAX)                                                 \
  81                                                                             \
  82   experimental(bool, G1UseReferencePrecleaning, true,                       \
  83                "Concurrently preclean java.lang.ref.references instances "  \
  84                "before the Remark pause.")                                  \
  85                                                                             \
  86   experimental(double, G1LastPLABAverageOccupancy, 50.0,                    \
  87                "The expected average occupancy of the last PLAB in "        \
  88                "percent.")                                                  \
  89                range(0.001, 100.0)                                          \
  90                                                                             \
  91   product(size_t, G1SATBBufferSize, 1*K,                                    \
  92           "Number of entries in an SATB log buffer.")                       \
  93           range(1, max_uintx)                                               \
  94                                                                             \
  95   develop(intx, G1SATBProcessCompletedThreshold, 20,                        \
  96           "Number of completed buffers that triggers log processing.")      \
  97           range(0, max_jint)                                                \
  98                                                                             \
  99   product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60,                \
 100           "Before enqueueing them, each mutator thread tries to do some "   \
 101           "filtering on the SATB buffers it generates. If post-filtering "  \
 102           "the percentage of retained entries is over this threshold "      \
 103           "the buffer will be enqueued for processing. A value of 0 "       \
 104           "specifies that mutator threads should not do such filtering.")   \
 105           range(0, 100)                                                     \


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