src/hotspot/share/gc/g1/g1ConcurrentRefineStats.cpp

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#include "gc/g1/g1ConcurrentRefineStats.hpp"

G1ConcurrentRefineStats::G1ConcurrentRefineStats() :
  _refinement_time(),
  _refined_cards(0),
  _precleaned_cards(0),
  _dirtied_cards(0)
{}

double G1ConcurrentRefineStats::refinement_rate_ms() const {
  // Report 0 when no time recorded because no refinement performed.
  double secs = refinement_time().seconds();
  return (secs > 0) ? (refined_cards() / (secs * MILLIUNITS)) : 0.0;
}

G1ConcurrentRefineStats&
G1ConcurrentRefineStats::operator+=(const G1ConcurrentRefineStats& other) {
  _refinement_time += other._refinement_time;
  _refined_cards += other._refined_cards;
  _precleaned_cards += other._precleaned_cards;
  _dirtied_cards += other._dirtied_cards;
  return *this;
}

template<typename T>
static T clipped_sub(T x, T y) {
  return (x < y) ? T() : (x - y);
}

G1ConcurrentRefineStats&
G1ConcurrentRefineStats::operator-=(const G1ConcurrentRefineStats& other) {
  _refinement_time = clipped_sub(_refinement_time, other._refinement_time);
  _refined_cards = clipped_sub(_refined_cards, other._refined_cards);
  _precleaned_cards = clipped_sub(_precleaned_cards, other._precleaned_cards);
  _dirtied_cards = clipped_sub(_dirtied_cards, other._dirtied_cards);
  return *this;
}

void G1ConcurrentRefineStats::reset() {
  *this = G1ConcurrentRefineStats();
}