1 /*
2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package gc.g1.plab.lib;
24
25 import java.util.ArrayList;
26 import java.util.HashMap;
27 import java.util.List;
28 import java.util.Map;
29 import java.util.Scanner;
30 import java.util.regex.Matcher;
31 import java.util.regex.Pattern;
32 import jdk.test.lib.Pair;
33
34 /**
35 * LogParser class parses VM output to get PLAB and ConsumptionStats values.
36 *
37 * Typical GC log with PLAB statistics looks like:
38 *
39 * #1: [GC pause (WhiteBox Initiated Young GC) (young) (allocated = 0 wasted = 0 unused = 0 used = 0 undo_waste = 0 region_end_waste = 0 regions filled = 0 direct_allocated = 0 failure_used = 0 failure_waste = 0) (plab_sz = 0 desired_plab_sz = 258)
40 * (allocated = 70692 wasted = 1450 unused = 1287 used = 67955 undo_waste = 0 region_end_waste = 0 regions filled = 1 direct_allocated = 19003 failure_used = 0 failure_waste = 0) (plab_sz = 13591 desired_plab_sz = 10193)
41 * where first line is statistic for young PLAB and second line is for old PLAB.
42 */
43 final public class LogParser {
44
45 // Name for GC ID field in report.
46 public final static String GC_ID = "gc_id";
47
48 /**
49 * Type of parsed log element.
50 */
51 public static enum ReportType {
52
53 SURVIVOR_STATS,
54 OLD_STATS
55 }
56
57 private final String log;
58 private final List<Pair<ReportType, ? extends Map<String, Long>>> reportHolder;
59
60 // GC ID
61 private static final Pattern GC_ID_PATTERN = Pattern.compile("#(\\d+):");
62 // Pattern for extraction pair <name>=<numeric value>
63 private static final Pattern PAIRS_PATTERN = Pattern.compile("\\w+\\s*=\\s*\\d+");
64
65 /**
66 * Construct LogParser Object
67 *
68 * @param log - VM Output
69 */
70 public LogParser(String log) {
71 if (log == null) {
72 throw new IllegalArgumentException("Parameter log should not be null.");
73 }
74 this.log = log;
75 reportHolder = parseLines();
76 }
77
78 /**
79 * @return log which is being processed
80 */
81 public String getLog() {
82 return log;
83 }
84
85 /**
86 * Returns list of log entries.
87 *
88 * @return list of Pair with ReportType and Map of parameters/values.
89 */
90 public List<Pair<ReportType, ? extends Map<String, Long>>> getEntries() {
91 return reportHolder;
92 }
93
94 private List<Pair<ReportType, ? extends Map<String, Long>>> parseLines() throws NumberFormatException {
95 Scanner lineScanner = new Scanner(log);
96 List<Pair<ReportType, ? extends Map<String, Long>>> allocationStatistics = new ArrayList<>();
97 long gc_id = 0;
98 while (lineScanner.hasNextLine()) {
99 String line = lineScanner.nextLine();
100 // If no any prefix - this is the Old PLAB statistics
101 ReportType currentStats = ReportType.OLD_STATS;
102 // #NUMBER - this is first line of PLAB statistics
103 if (line.startsWith("#")) {
104 currentStats = ReportType.SURVIVOR_STATS;
105 gc_id = getGcId(line);
106 }
107
108 Matcher matcher = PAIRS_PATTERN.matcher(line);
109 if (matcher.find()) {
110 HashMap<String, Long> map = new HashMap<>();
111 map.put(GC_ID, gc_id);
112 allocationStatistics.add(new Pair<>(currentStats, map));
113 // Extract all pairs from log.
114 do {
115 String pair = matcher.group();
116 String[] nameValue = pair.replaceAll(" ", "").split("=");
117 map.put(nameValue[0], Long.parseLong(nameValue[1]));
118 } while (matcher.find());
119 }
120 }
121 return allocationStatistics;
122 }
123
124 private long getGcId(String line) {
125 Matcher number = GC_ID_PATTERN.matcher(line);
126 if (number.find()) {
127 return Long.parseLong(number.group(1));
128 }
129 throw new RuntimeException("Should not reach");
130 }
131 }