1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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24
25#ifndef SHARE_GC_G1_G1HETEROGENEOUSHEAPYOUNGGENSIZER_HPP
26#define SHARE_GC_G1_G1HETEROGENEOUSHEAPYOUNGGENSIZER_HPP
27
28#include "gc/g1/g1YoungGenSizer.hpp"
29
30// This class prevents the size of young generation of G1 heap to exceed dram
31// memory available. If set on command line, MaxRAM and MaxRAMFraction/MaxRAMPercentage
32// are used to determine the maximum size that young generation can grow.
33// Else we set the maximum size to 80% of dram available in the system.
34
35class G1HeterogeneousHeapYoungGenSizer : public G1YoungGenSizer {
36private:
37 // maximum no of regions that young generation can grow to. Calculated in constructor.
38 uint _max_young_length;
39 void adjust_lengths_based_on_dram_memory();
40
41public:
42 G1HeterogeneousHeapYoungGenSizer();
43
44 // Calculate the maximum length of the young gen given the number of regions
45 // depending on the sizing algorithm.
46 virtual void adjust_max_new_size(uint number_of_heap_regions);
47
48 virtual void heap_size_changed(uint new_number_of_heap_regions);
49};
50
51#endif // SHARE_GC_G1_G1HETEROGENEOUSHEAPYOUNGGENSIZER_HPP
52