io.netty.buffer.PoolArenaMetric Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2015 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package io.netty.buffer;

import java.util.List;

/**
 * Expose metrics for an arena.
 */
public interface PoolArenaMetric {

    /**
     * Returns the number of thread caches backed by this arena.
     */
    int numThreadCaches();

    /**
     * Returns the number of tiny sub-pages for the arena.
     */
    int numTinySubpages();

    /**
     * Returns the number of small sub-pages for the arena.
     */
    int numSmallSubpages();

    /**
     * Returns the number of chunk lists for the arena.
     */
    int numChunkLists();

    /**
     * Returns an unmodifiable {@link List} which holds {@link PoolSubpageMetric}s for tiny sub-pages.
     */
    List tinySubpages();

    /**
     * Returns an unmodifiable {@link List} which holds {@link PoolSubpageMetric}s for small sub-pages.
     */
    List smallSubpages();

    /**
     * Returns an unmodifiable {@link List} which holds {@link PoolChunkListMetric}s.
     */
    List chunkLists();

    /**
     * Return the number of allocations done via the arena. This includes all sizes.
     */
    long numAllocations();

    /**
     * Return the number of tiny allocations done via the arena.
     */
    long numTinyAllocations();

    /**
     * Return the number of small allocations done via the arena.
     */
    long numSmallAllocations();

    /**
     * Return the number of normal allocations done via the arena.
     */
    long numNormalAllocations();

    /**
     * Return the number of huge allocations done via the arena.
     */
    long numHugeAllocations();

    /**
     * Return the number of deallocations done via the arena. This includes all sizes.
     */
    long numDeallocations();

    /**
     * Return the number of tiny deallocations done via the arena.
     */
    long numTinyDeallocations();

    /**
     * Return the number of small deallocations done via the arena.
     */
    long numSmallDeallocations();

    /**
     * Return the number of normal deallocations done via the arena.
     */
    long numNormalDeallocations();

    /**
     * Return the number of huge deallocations done via the arena.
     */
    long numHugeDeallocations();

    /**
     * Return the number of currently active allocations.
     */
    long numActiveAllocations();

    /**
     * Return the number of currently active tiny allocations.
     */
    long numActiveTinyAllocations();

    /**
     * Return the number of currently active small allocations.
     */
    long numActiveSmallAllocations();

    /**
     * Return the number of currently active normal allocations.
     */
    long numActiveNormalAllocations();

    /**
     * Return the number of currently active huge allocations.
     */
    long numActiveHugeAllocations();

    /**
     * Return the number of active bytes that are currently allocated by the arena.
     */
    long numActiveBytes();
}