GlobalGCStats.hpp

/*******************************************************************************
 * Copyright IBM Corp. and others 1991
 *
 * This program and the accompanying materials are made available under
 * the terms of the Eclipse Public License 2.0 which accompanies this
 * distribution and is available at https://www.eclipse.org/legal/epl-2.0/
 * or the Apache License, Version 2.0 which accompanies this distribution and
 * is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * This Source Code may also be made available under the following
 * Secondary Licenses when the conditions for such availability set
 * forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
 * General Public License, version 2 with the GNU Classpath
 * Exception [1] and GNU General Public License, version 2 with the
 * OpenJDK Assembly Exception [2].
 *
 * [1] https://www.gnu.org/software/classpath/license.html
 * [2] https://openjdk.org/legal/assembly-exception.html
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
 *******************************************************************************/

#if !defined(GLOBALGCSTATS_HPP_)
#define GLOBALGCSTATS_HPP_

#include "omrcomp.h"
#include "modronbase.h"

#include "ClassUnloadStats.hpp"
#if defined(OMR_GC_MODRON_COMPACTION)
#include "CompactStats.hpp"
#endif /* OMR_GC_MODRON_COMPACTION */
#include "MarkStats.hpp"
#include "MetronomeStats.hpp"
#include "SweepStats.hpp"
#include "WorkPacketStats.hpp"

/**
 * Storage for statistics relevant to global garbage collections
 * @ingroup GC_Stats_Core
 */
class MM_GlobalGCStats {
public:
	uintptr_t gcCount; /**< Count of the number of GC cycles that have occurred */
	MM_WorkPacketStats workPacketStats;
	MM_SweepStats sweepStats;
#if defined(OMR_GC_MODRON_COMPACTION)
	MM_CompactStats compactStats;
#endif /* OMR_GC_MODRON_COMPACTION */

	uintptr_t fixHeapForWalkReason;
	uint64_t fixHeapForWalkTime;
	uint64_t fixHeapForWalkObjectCount;

	MM_MarkStats markStats;
	MM_ClassUnloadStats classUnloadStats;
	MM_MetronomeStats metronomeStats; /**< Stats collected during one GC increment (quantum) */

	MMINLINE void clear()
	{
		/* gcCount is not cleared as the value must persist across cycles */

		workPacketStats.clear();
		sweepStats.clear();
#if defined(OMR_GC_MODRON_COMPACTION)
		compactStats.clear();
#endif /* OMR_GC_MODRON_COMPACTION */

		fixHeapForWalkReason = FIXUP_NONE;
		fixHeapForWalkTime = 0;
		fixHeapForWalkObjectCount = 0;

		markStats.clear();
		classUnloadStats.clear();
		metronomeStats.clearStart();
	};

	/**
	 * Get the total stall time
	 * @return the time in hi-res ticks
	 */
	MMINLINE uint64_t 
	getStallTime()
	{
		return markStats.getStallTime() + workPacketStats.getStallTime() + sweepStats.idleTime;
	}

	MM_GlobalGCStats() :
		gcCount(0),
		workPacketStats(),
		sweepStats(),
#if defined(OMR_GC_MODRON_COMPACTION)
		compactStats(),
#endif /* OMR_GC_MODRON_COMPACTION */
		fixHeapForWalkReason(FIXUP_NONE),
		fixHeapForWalkTime(0),
		fixHeapForWalkObjectCount(0),
		markStats(),
		classUnloadStats(),
		metronomeStats()
	{}
};

#endif /* GLOBALGCSTATS_HPP_ */