src/hotspot/share/gc/g1/g1HeterogeneousHeapPolicy.cpp

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#include "precompiled.hpp"
#include "gc/g1/g1CollectedHeap.hpp"
#include "gc/g1/g1HeterogeneousHeapPolicy.hpp"
#include "gc/g1/g1Policy.hpp"
#include "gc/g1/heterogeneousHeapRegionManager.hpp"

G1HeterogeneousHeapPolicy::G1HeterogeneousHeapPolicy(STWGCTimer* gc_timer) :
  G1Policy(gc_timer), _manager(NULL) {}

// We call the super class init(), after which we provision young_list_target_length() regions in dram.
void G1HeterogeneousHeapPolicy::init(G1CollectedHeap* g1h, G1CollectionSet* collection_set) {
  G1Policy::init(g1h, collection_set);
  _manager = HeterogeneousHeapRegionManager::manager();
  _manager->adjust_dram_regions((uint)young_list_target_length(), G1CollectedHeap::heap()->workers());
}

// After a collection pause, young list target length is updated. So we need to make sure we have enough regions in dram for young gen.
void G1HeterogeneousHeapPolicy::record_collection_pause_end(double pause_time_ms, size_t cards_scanned, size_t heap_used_bytes_before_gc) {
  G1Policy::record_collection_pause_end(pause_time_ms, cards_scanned, heap_used_bytes_before_gc);
  _manager->adjust_dram_regions((uint)young_list_target_length(), G1CollectedHeap::heap()->workers());
}

// After a full collection, young list target length is updated. So we need to make sure we have enough regions in dram for young gen.
void G1HeterogeneousHeapPolicy::record_full_collection_end() {
  G1Policy::record_full_collection_end();
  _manager->adjust_dram_regions((uint)young_list_target_length(), G1CollectedHeap::heap()->workers());
}

bool G1HeterogeneousHeapPolicy::force_upgrade_to_full() {
  if (_manager->has_borrowed_regions()) {
    return true;
  }
  return false;
}