DfsReaderIoStats.java

  1. /*
  2.  * Copyright (C) 2017, Google Inc. and others
  3.  *
  4.  * This program and the accompanying materials are made available under the
  5.  * terms of the Eclipse Distribution License v. 1.0 which is available at
  6.  * https://www.eclipse.org/org/documents/edl-v10.php.
  7.  *
  8.  * SPDX-License-Identifier: BSD-3-Clause
  9.  */

  11. package org.eclipse.jgit.internal.storage.dfs;

  13. /**
  14.  * IO statistics for a {@link org.eclipse.jgit.internal.storage.dfs.DfsReader}.
  15.  */
  16. public class DfsReaderIoStats {
  17.     /** POJO to accumulate IO statistics. */
  18.     public static class Accumulator {
  19.         /** Number of times the reader explicitly called scanPacks. */
  20.         long scanPacks;

  22.         /** Total number of complete pack indexes read into memory. */
  23.         long readIdx;

  25.         /** Total number of complete bitmap indexes read into memory. */
  26.         long readBitmap;

  28.         /** Total number of bytes read from indexes. */
  29.         long readIdxBytes;

  31.         /** Total microseconds spent reading pack or bitmap indexes. */
  32.         long readIdxMicros;

  34.         /** Total number of block cache hits. */
  35.         long blockCacheHit;

  37.         /**
  38.          * Total number of discrete blocks actually read from pack file(s), that is,
  39.          * block cache misses.
  40.          */
  41.         long readBlock;

  43.         /**
  44.          * Total number of compressed bytes read during cache misses, as block sized
  45.          * units.
  46.          */
  47.         long readBlockBytes;

  49.         /** Total microseconds spent reading {@link #readBlock} blocks. */
  50.         long readBlockMicros;

  52.         /** Total number of bytes decompressed. */
  53.         long inflatedBytes;

  55.         /** Total microseconds spent inflating compressed bytes. */
  56.         long inflationMicros;

  58.         Accumulator() {
  59.         }
  60.     }

  62.     private final Accumulator stats;

  64.     DfsReaderIoStats(Accumulator stats) {
  65.         this.stats = stats;
  66.     }

  68.     /**
  69.      * Get number of times the reader explicitly called scanPacks.
  70.      *
  71.      * @return number of times the reader explicitly called scanPacks.
  72.      */
  73.     public long getScanPacks() {
  74.         return stats.scanPacks;
  75.     }

  77.     /**
  78.      * Get total number of complete pack indexes read into memory.
  79.      *
  80.      * @return total number of complete pack indexes read into memory.
  81.      */
  82.     public long getReadPackIndexCount() {
  83.         return stats.readIdx;
  84.     }

  86.     /**
  87.      * Get total number of complete bitmap indexes read into memory.
  88.      *
  89.      * @return total number of complete bitmap indexes read into memory.
  90.      */
  91.     public long getReadBitmapIndexCount() {
  92.         return stats.readBitmap;
  93.     }

  95.     /**
  96.      * Get total number of bytes read from indexes.
  97.      *
  98.      * @return total number of bytes read from indexes.
  99.      */
  100.     public long getReadIndexBytes() {
  101.         return stats.readIdxBytes;
  102.     }

  104.     /**
  105.      * Get total microseconds spent reading pack or bitmap indexes.
  106.      *
  107.      * @return total microseconds spent reading pack or bitmap indexes.
  108.      */
  109.     public long getReadIndexMicros() {
  110.         return stats.readIdxMicros;
  111.     }

  113.     /**
  114.      * Get total number of block cache hits.
  115.      *
  116.      * @return total number of block cache hits.
  117.      */
  118.     public long getBlockCacheHits() {
  119.         return stats.blockCacheHit;
  120.     }

  122.     /**
  123.      * Get total number of discrete blocks actually read from pack file(s), that
  124.      * is, block cache misses.
  125.      *
  126.      * @return total number of discrete blocks read from pack file(s).
  127.      */
  128.     public long getReadBlocksCount() {
  129.         return stats.readBlock;
  130.     }

  132.     /**
  133.      * Get total number of compressed bytes read during cache misses, as block
  134.      * sized units.
  135.      *
  136.      * @return total number of compressed bytes read as block sized units.
  137.      */
  138.     public long getReadBlocksBytes() {
  139.         return stats.readBlockBytes;
  140.     }

  142.     /**
  143.      * Get total microseconds spent reading blocks during cache misses.
  144.      *
  145.      * @return total microseconds spent reading blocks.
  146.      */
  147.     public long getReadBlocksMicros() {
  148.         return stats.readBlockMicros;
  149.     }

  151.     /**
  152.      * Get total number of bytes decompressed.
  153.      *
  154.      * @return total number of bytes decompressed.
  155.      */
  156.     public long getInflatedBytes() {
  157.         return stats.inflatedBytes;
  158.     }

  160.     /**
  161.      * Get total microseconds spent inflating compressed bytes.
  162.      *
  163.      * @return total microseconds inflating compressed bytes.
  164.      */
  165.     public long getInflationMicros() {
  166.         return stats.inflationMicros;
  167.     }
  168. }
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