/*

 * Copyright (c) 2018, Red Hat, Inc. All rights reserved.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#include "precompiled.hpp"

#include "gc/shenandoah/shenandoahHeap.hpp"

#include "gc/shenandoah/shenandoahPhaseTimings.hpp"

#include "gc/shenandoah/shenandoahTimingTracker.hpp"

#include "gc/shenandoah/shenandoahUtils.hpp"

#include "runtime/os.hpp"

ShenandoahPhaseTimings::Phase ShenandoahTerminationTracker::_current_termination_phase = ShenandoahPhaseTimings::_num_phases;

ShenandoahWorkerTimingsTracker::ShenandoahWorkerTimingsTracker(ShenandoahWorkerTimings* worker_times,

                                                              ShenandoahPhaseTimings::GCParPhases phase, uint worker_id) :

  _phase(phase), _worker_times(worker_times), _worker_id(worker_id) {

  if (_worker_times != NULL) {

    _start_time = os::elapsedTime();

  }

}

ShenandoahWorkerTimingsTracker::~ShenandoahWorkerTimingsTracker() {

  if (_worker_times != NULL) {

    _worker_times->record_time_secs(_phase, _worker_id, os::elapsedTime() - _start_time);

  }

  if (ShenandoahGCPhase::is_root_work_phase()) {

    ShenandoahPhaseTimings::Phase root_phase = ShenandoahGCPhase::current_phase();

    ShenandoahPhaseTimings::Phase cur_phase = (ShenandoahPhaseTimings::Phase)((int)root_phase + (int)_phase + 1);

    _event.commit(GCId::current(), _worker_id, ShenandoahPhaseTimings::phase_name(cur_phase));

  }

}

ShenandoahTerminationTimingsTracker::ShenandoahTerminationTimingsTracker(uint worker_id) :

  _worker_id(worker_id)  {

  if (ShenandoahTerminationTrace) {

    _start_time = os::elapsedTime();

  }

}

ShenandoahTerminationTimingsTracker::~ShenandoahTerminationTimingsTracker() {

  if (ShenandoahTerminationTrace) {

    ShenandoahHeap::heap()->phase_timings()->termination_times()->record_time_secs(_worker_id, os::elapsedTime() - _start_time);

  }

}

ShenandoahTerminationTracker::ShenandoahTerminationTracker(ShenandoahPhaseTimings::Phase phase) : _phase(phase) {

  assert(_current_termination_phase == ShenandoahPhaseTimings::_num_phases, "Should be invalid");

  assert(phase == ShenandoahPhaseTimings::termination ||

         phase == ShenandoahPhaseTimings::final_traversal_gc_termination ||

         phase == ShenandoahPhaseTimings::full_gc_mark_termination ||

         phase == ShenandoahPhaseTimings::conc_termination ||

         phase == ShenandoahPhaseTimings::conc_traversal_termination ||

         phase == ShenandoahPhaseTimings::weakrefs_termination ||

         phase == ShenandoahPhaseTimings::full_gc_weakrefs_termination,

         "Only these phases");

  assert(Thread::current()->is_VM_thread() || Thread::current()->is_ConcurrentGC_thread(),

    "Called from wrong thread");

  _current_termination_phase = phase;

  ShenandoahHeap::heap()->phase_timings()->termination_times()->reset();

}

ShenandoahTerminationTracker::~ShenandoahTerminationTracker() {

  assert(_phase == _current_termination_phase, "Can not change phase");

  ShenandoahPhaseTimings* phase_times = ShenandoahHeap::heap()->phase_timings();

  double t = phase_times->termination_times()->average();

  phase_times->record_phase_time(_phase, t);

  debug_only(_current_termination_phase = ShenandoahPhaseTimings::_num_phases;)

}