Mercurial > hg > blitz_condensed

annotate src/org/dancres/blitz/tools/CondensedStats.java @ 34:6f68e94c1fb8 default tip

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Add CondensedStats monitoring utility, equivalent to vmstat
author Dominic Cleal <dominic-cleal@cdo2.com>
date Thu, 05 Aug 2010 11:07:25 +0100
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1 package org.dancres.blitz.tools;
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2
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3 import java.io.PrintStream;
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4 import java.rmi.RemoteException;
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5 import java.util.ArrayList;
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6 import java.util.Collection;
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7 import java.util.Formatter;
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8
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9 import org.dancres.blitz.remote.StatsAdmin;
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10 import org.dancres.blitz.stats.BlockingOpsStat;
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11 import org.dancres.blitz.stats.EventQueueStat;
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12 import org.dancres.blitz.stats.IOStat;
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13 import org.dancres.blitz.stats.InstanceCount;
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14 import org.dancres.blitz.stats.MemoryStat;
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15 import org.dancres.blitz.stats.MissedOpsStat;
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16 import org.dancres.blitz.stats.OpStat;
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17 import org.dancres.blitz.stats.Stat;
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18 import org.dancres.blitz.stats.TaskQueueStat;
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19 import org.dancres.blitz.stats.ThreadStat;
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20 import org.dancres.blitz.stats.TxnStat;
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21
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22 /**
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23 <p>CondensedStats accepts a spacename as an argument and a loop time. It
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24 then regularly prints a condensed view of some important space stats every
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25 loop time seconds. Specifying a loop time of 0 will cause MonitorStats to
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26 dump stats once and exit.</p>
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27
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28 <p>Typical usage:
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29
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30 <pre>
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31 java -Xmx256m -Djava.security.policy=config/policy.all
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32 -classpath /home/dan/jini/jini2_0/lib/jsk-platform.jar:/home/dan/src/jini/space/build:/home/dan/jini/jini2_0/lib/jini-ext.jar:/home/dan/jini/jini2_0/lib/sun-util.jar
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33 org.dancres.blitz.tools.CondensedStats dancres 20
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34 </pre>
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35
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36 @see org.dancres.blitz.remote.BlitzAdmin
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37 */
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38 public class CondensedStats extends MonitorStats {
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39 public static void main(String args[]) {
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40 new CondensedStats().startup(args);
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41 }
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42
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43 @Override
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44 Runnable getWatcher(StatsAdmin anAdmin, long aTimeout)
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45 {
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46 return new CondensedWatcher(anAdmin, aTimeout);
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47 }
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48
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49 /**
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50 * Provides a vmstat-style one line repeating summary of Blitz statistics.
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51 * Includes operation counts, active txns/ops, listeners and queue stats,
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52 * writer I/O and VM stats.
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53 */
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54 static class CondensedWatcher implements Runnable {
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55 private StatsAdmin theAdmin;
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56 private long theTimeout;
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57 private Stat[] theLastStats;
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58
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59 CondensedWatcher(StatsAdmin anAdmin, long aTimeout) {
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60 theAdmin = anAdmin;
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61 theTimeout = aTimeout;
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62 }
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63
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64 public void run() {
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65 boolean run = true;
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66 while (run) {
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67 try {
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68 // if timeout is 0, run once over a 1 second period
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69 if (theTimeout == 0) {
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70 run = false;
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71 theTimeout = 1000;
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72 }
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73
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74 printHeader(System.out);
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75
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76 theLastStats = theAdmin.getStats();
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77
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78 for (int i = 0;; i++) {
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79 Thread.sleep(theTimeout);
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80
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81 print(System.out, (int)theTimeout / 1000);
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82 if ((i + 1) % 48 == 0)
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83 printHeader(System.out);
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84 }
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85 } catch (Exception anE) {
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86 System.err.println(anE);
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87 anE.printStackTrace();
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88 }
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89 }
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90 }
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91
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92 public void printHeader(PrintStream out) {
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93 out.println("-----ops---- " +
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94 " missed " +
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95 "obj " +
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96 "---active-- " +
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97 "listeners " +
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98 "---queues-- " +
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99 "------io----- " +
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100 "-----vm-----");
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101
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102 out.println(" r t w " +
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103 " r t " +
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104 "+/- " +
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105 "txn r t " +
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106 " tr pt " +
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107 "evt rem oth " +
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108 " i/o qsz thr " +
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109 "thrd mem max");
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110 }
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111
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112 public void print(PrintStream out, int interval) throws RemoteException {
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113 Stat[] last = theLastStats;
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114 Stat[] stats = theAdmin.getStats();
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115
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116 // Operation count since last iteration
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117 long opReads = getOpCount(stats, OpStat.READS) -
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118 getOpCount(last, OpStat.READS);
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119 long opTakes = getOpCount(stats, OpStat.TAKES) -
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120 getOpCount(last, OpStat.TAKES);
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121 long opWrites = (getOpCount(stats, OpStat.WRITES) -
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122 getOpCount(last, OpStat.WRITES)) / interval;
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123
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124 // Missed operations, not available until first operation
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125 long missReads = 0, missTakes = 0;
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126 MissedOpsStat missedStat = getStatistic(stats, MissedOpsStat.class);
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127 MissedOpsStat missedLast = getStatistic(stats, MissedOpsStat.class);
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128
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129 if (missedStat != null && missedLast != null) {
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130 missReads = (missedStat.getMissedReads() - missedLast.getMissedReads())
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131 / interval;
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132 missTakes = (missedStat.getMissedTakes() - missedLast.getMissedTakes())
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133 / interval;
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134 }
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135
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136 // Change op counts to include misses
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137 opReads = (opReads + missReads) / interval;
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138 opTakes = (opTakes + missTakes) / interval;
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139
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140 // Overall instance count
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141 long instances = (getInstanceCount(stats) - getInstanceCount(last))
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142 / interval;
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143
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144 // Active operations/txns
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145 int activeTxn = getStatistic(stats, TxnStat.class).getActiveTxnCount();
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146
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147 // Not available until after first space operation
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148 int activeRead = 0, activeTake = 0;
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149 BlockingOpsStat blockedOps = getStatistic(stats, BlockingOpsStat.class);
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150 if (blockedOps != null) {
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151 activeRead = blockedOps.getReaders();
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152 activeTake = blockedOps.getTakers();
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153 }
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154
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155 // Notify listeners
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156 int listenTrans = getStatistic(stats, EventQueueStat.class).getTransientCount();
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157 int listenPers = getStatistic(stats, EventQueueStat.class).getPersistentCount();
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158
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159 // Queues, internal notify queue, remote notify queue and other tasks
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160 int queueEvents = getTaskQueue(stats, "Events");
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161 int queueRemote = getTaskQueue(stats, "RemoteEvent");
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162 int queueOther = getTaskQueue(stats, "DefaultTask");
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163
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164 // Writer I/O if persistent storage model in use
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165 double ioRatio = 0;
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166 int ioQueueSize = 0, ioThrottle = 0;
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167
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168 IOStat myIoStat = getStatistic(stats, IOStat.class);
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169 if (myIoStat != null) {
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170 ioRatio = myIoStat.getInOutRatio();
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171 ioQueueSize = getStatistic(stats, IOStat.class).getQueueSize();
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172 ioThrottle = (getStatistic(stats, IOStat.class).getThrottleCount() -
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173 getStatistic(last, IOStat.class).getThrottleCount())
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174 / interval;
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175 }
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176
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177 // Virtual machine
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178 int vmThreads = getStatistic(stats, ThreadStat.class).getThreadCount();
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179
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180 double vmMemory = getStatistic(stats, MemoryStat.class).getCurrentMemory();
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181 vmMemory = vmMemory / 1024 / 1024 / 1024;
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182
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183 double vmMaxMem = getStatistic(stats, MemoryStat.class).getMaxMemory();
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184 vmMaxMem = vmMaxMem / 1024 / 1024 / 1024;
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185
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186 // r t w$ r w$ +/-$txn r t$ tr pt
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187 String formatString = "%4d %3d %3d %4d %3d %5d %4d %3d %3d %5d %4d ";
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188 // evt rem oth$i/o qsz thr$thrd mem max
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189 formatString += "%4d %3d %3d %5.1f %4d %3d %5d %3.1f %3.1f";
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190
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191 String line = new Formatter().format(formatString,
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192 opReads, opTakes, opWrites,
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193 missReads, missTakes, instances,
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194 activeTxn, activeRead, activeTake,
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195 listenTrans, listenPers,
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196 queueEvents, queueRemote, queueOther,
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197 ioRatio, ioQueueSize, ioThrottle,
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198 vmThreads, vmMemory, vmMaxMem).toString();
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199
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200 out.println(line);
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201
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202 theLastStats = stats;
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203 }
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204
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205 private <T extends Stat> Collection<T> getStatistics(Stat[] allStats,
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206 Class<T> statClazz) {
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207 Collection<T> ret = new ArrayList<T>();
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208 for (Stat stat : allStats)
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209 if (statClazz.isInstance(stat))
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210 ret.add(statClazz.cast(stat));
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211
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212 return ret;
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213 }
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214
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215 private <T extends Stat> T getStatistic(Stat[] allStats,
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216 Class<T> statClazz) {
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217 Collection<T> subset = getStatistics(allStats, statClazz);
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218 return (subset.isEmpty()) ? null : subset.iterator().next();
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219 }
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220
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221 /** Adds up operations across all entry types.
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222 * @param opType OpStat.TAKES/READS/WRITES
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223 */
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224 private long getOpCount(Stat[] stats, int opType) {
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225 long count = 0;
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226 for (OpStat ops : getStatistics(stats, OpStat.class))
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227 if (ops.getOp() == opType)
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228 count += ops.getCount();
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229
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230 return count;
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231 }
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232
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233 /** Adds up instance counts across all entry types. */
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234 private long getInstanceCount(Stat[] stats) {
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235 long count = 0;
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236 for (InstanceCount ops : getStatistics(stats, InstanceCount.class))
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237 count += ops.getCount();
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238
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239 return count;
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240 }
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241
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242 /** Gets size of a task queue with a particular task name */
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243 private int getTaskQueue(Stat[] stats, String taskName) {
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244 for (TaskQueueStat ops : getStatistics(stats, TaskQueueStat.class))
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245 if (taskName.equals(ops.getQueueName()))
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246 return ops.getQueueSize();
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247
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248 return 0;
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249 }
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250 }
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251 }