shenandoahCollectorPolicy.hpp

/*
 * Copyright (c) 2013, 2021, Red Hat, Inc. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
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#ifndef SHARE_GC_SHENANDOAH_SHENANDOAHCOLLECTORPOLICY_HPP
#define SHARE_GC_SHENANDOAH_SHENANDOAHCOLLECTORPOLICY_HPP

#include "gc/shared/gcTrace.hpp"
#include "gc/shenandoah/shenandoahGC.hpp"
#include "gc/shenandoah/shenandoahSharedVariables.hpp"
#include "memory/allocation.hpp"
#include "utilities/ostream.hpp"

class ShenandoahTracer : public GCTracer {
public:
  ShenandoahTracer() : GCTracer(Shenandoah) {}
};

class ShenandoahCollectorPolicy : public CHeapObj<mtGC> {
private:
  size_t _success_concurrent_gcs;
  size_t _success_degenerated_gcs;
  size_t _success_full_gcs;
  size_t _alloc_failure_degenerated;
  size_t _alloc_failure_degenerated_upgrade_to_full;
  size_t _alloc_failure_full;
  size_t _explicit_concurrent;
  size_t _explicit_full;
  size_t _implicit_concurrent;
  size_t _implicit_full;
  size_t _degen_points[ShenandoahGC::_DEGENERATED_LIMIT];

  ShenandoahSharedFlag _in_shutdown;

  ShenandoahTracer* _tracer;

  size_t _cycle_counter;

public:
  ShenandoahCollectorPolicy();

  // TODO: This is different from gc_end: that one encompasses one VM operation.
  // These two encompass the entire cycle.
  void record_cycle_start();

  void record_success_concurrent();
  void record_success_degenerated();
  void record_success_full();
  void record_alloc_failure_to_degenerated(ShenandoahGC::ShenandoahDegenPoint point);
  void record_alloc_failure_to_full();
  void record_degenerated_upgrade_to_full();
  void record_explicit_to_concurrent();
  void record_explicit_to_full();
  void record_implicit_to_concurrent();
  void record_implicit_to_full();

  void record_shutdown();
  bool is_at_shutdown();

  ShenandoahTracer* tracer() {return _tracer;}

  size_t cycle_counter() const;

  void print_gc_stats(outputStream* out) const;
};

#endif // SHARE_GC_SHENANDOAH_SHENANDOAHCOLLECTORPOLICY_HPP