src/hotspot/share/gc/z/zDirector.cpp

*** 122,132 ****
    const double max_alloc_rate = (ZStatAllocRate::avg() * ZAllocationSpikeTolerance) + (ZStatAllocRate::avg_sd() * one_in_1000);
    const double time_until_oom = free / (max_alloc_rate + 1.0); // Plus 1.0B/s to avoid division by zero
  
    // Calculate max duration of a GC cycle. The duration of GC is a moving
    // average, we add ~3.3 sigma to account for the GC duration variance.
!   const AbsSeq& duration_of_gc = ZStatCycle::duration();
    const double max_duration_of_gc = duration_of_gc.davg() + (duration_of_gc.dsd() * one_in_1000);
  
    // Calculate time until GC given the time until OOM and max duration of GC.
    // We also deduct the sample interval, so that we don't overshoot the target
    // time and end up starting the GC too late in the next interval.
--- 122,132 ----
    const double max_alloc_rate = (ZStatAllocRate::avg() * ZAllocationSpikeTolerance) + (ZStatAllocRate::avg_sd() * one_in_1000);
    const double time_until_oom = free / (max_alloc_rate + 1.0); // Plus 1.0B/s to avoid division by zero
  
    // Calculate max duration of a GC cycle. The duration of GC is a moving
    // average, we add ~3.3 sigma to account for the GC duration variance.
!   const AbsSeq& duration_of_gc = ZStatCycle::normalized_duration();
    const double max_duration_of_gc = duration_of_gc.davg() + (duration_of_gc.dsd() * one_in_1000);
  
    // Calculate time until GC given the time until OOM and max duration of GC.
    // We also deduct the sample interval, so that we don't overshoot the target
    // time and end up starting the GC too late in the next interval.
*** 165,175 ****
      return false;
    }
  
    const double assumed_throughput_drop_during_gc = 0.50; // 50%
    const double acceptable_throughput_drop = 0.01;        // 1%
!   const AbsSeq& duration_of_gc = ZStatCycle::duration();
    const double max_duration_of_gc = duration_of_gc.davg() + (duration_of_gc.dsd() * one_in_1000);
    const double acceptable_gc_interval = max_duration_of_gc * ((assumed_throughput_drop_during_gc / acceptable_throughput_drop) - 1.0);
    const double time_until_gc = acceptable_gc_interval - time_since_last_gc;
  
    log_debug(gc, director)("Rule: Proactive, AcceptableGCInterval: %.3lfs, TimeSinceLastGC: %.3lfs, TimeUntilGC: %.3lfs",
--- 165,175 ----
      return false;
    }
  
    const double assumed_throughput_drop_during_gc = 0.50; // 50%
    const double acceptable_throughput_drop = 0.01;        // 1%
!   const AbsSeq& duration_of_gc = ZStatCycle::normalized_duration();
    const double max_duration_of_gc = duration_of_gc.davg() + (duration_of_gc.dsd() * one_in_1000);
    const double acceptable_gc_interval = max_duration_of_gc * ((assumed_throughput_drop_during_gc / acceptable_throughput_drop) - 1.0);
    const double time_until_gc = acceptable_gc_interval - time_since_last_gc;
  
    log_debug(gc, director)("Rule: Proactive, AcceptableGCInterval: %.3lfs, TimeSinceLastGC: %.3lfs, TimeUntilGC: %.3lfs",