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src/hotspot/share/gc/g1/g1HeapSizingPolicy.cpp

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rev 47452 : [mq]: 8189729-erikd-review

*** 49,61 **** double recent_gc_overhead = _analytics->recent_avg_pause_time_ratio() * 100.0; double last_gc_overhead = _analytics->last_pause_time_ratio() * 100.0; assert(GCTimeRatio > 0, "we should have set it to a default value set_g1_gc_flags() " "if a user set it to 0"); ! const double gc_overhead_perc = 100.0 * (1.0 / (1.0 + GCTimeRatio)); ! double threshold = gc_overhead_perc; size_t expand_bytes = 0; // If the heap is at less than half its maximum size, scale the threshold down, // to a limit of 1. Thus the smaller the heap is, the more likely it is to expand, // though the scaling code will likely keep the increase small. --- 49,61 ---- double recent_gc_overhead = _analytics->recent_avg_pause_time_ratio() * 100.0; double last_gc_overhead = _analytics->last_pause_time_ratio() * 100.0; assert(GCTimeRatio > 0, "we should have set it to a default value set_g1_gc_flags() " "if a user set it to 0"); ! const double gc_overhead_percent = 100.0 * (1.0 / (1.0 + GCTimeRatio)); ! double threshold = gc_overhead_percent; size_t expand_bytes = 0; // If the heap is at less than half its maximum size, scale the threshold down, // to a limit of 1. Thus the smaller the heap is, the more likely it is to expand, // though the scaling code will likely keep the increase small.
*** 105,117 **** if (committed_bytes < InitialHeapSize / 4) { expand_bytes = (InitialHeapSize - committed_bytes) / 2; } else { double const MinScaleDownFactor = 0.2; double const MaxScaleUpFactor = 2; ! double const StartScaleDownAt = gc_overhead_perc; ! double const StartScaleUpAt = gc_overhead_perc * 1.5; ! double const ScaleUpRange = gc_overhead_perc * 2.0; double ratio_delta; if (filled_history_buffer) { ratio_delta = recent_gc_overhead - threshold; } else { --- 105,117 ---- if (committed_bytes < InitialHeapSize / 4) { expand_bytes = (InitialHeapSize - committed_bytes) / 2; } else { double const MinScaleDownFactor = 0.2; double const MaxScaleUpFactor = 2; ! double const StartScaleDownAt = gc_overhead_percent; ! double const StartScaleUpAt = gc_overhead_percent * 1.5; ! double const ScaleUpRange = gc_overhead_percent * 2.0; double ratio_delta; if (filled_history_buffer) { ratio_delta = recent_gc_overhead - threshold; } else {
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