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6162
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 /*
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25 * @test
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26 * @bug 7158800
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27 * @run shell/timeout=400 Test7158800.sh
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28 * @summary This test performs poorly if alternate hashing isn't used for
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29 * string table.
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30 * The timeout is handled by the shell file (which kills the process)
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31 */
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32 import java.util.*;
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33 import java.io.*;
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34
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35 public class InternTest {
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36 public static void main (String args[]) throws Exception {
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37 final String badStringsFilename = "badstrings.txt";
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38
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39 if (args.length == 0 || (!args[0].equals("bad") && !args[0].equals("normal"))) {
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40 System.out.println("Usage: java InternTest [normal|bad]");
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41 System.exit(1);
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42 }
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43
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44 FileInputStream fstream = new FileInputStream(badStringsFilename);
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45 DataInputStream in = new DataInputStream(fstream);
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46 BufferedReader br = new BufferedReader(new InputStreamReader(in));
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47 String toIntern, toDiscard;
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48 int count = 0;
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49 long current = 0L;
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50 long last = System.currentTimeMillis();
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51
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52 if (args[0].equals("bad")) {
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53 while ((toIntern = br.readLine()) != null) {
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54 toDiscard = new String((new Integer((int)(Math.random() * Integer.MAX_VALUE))).toString());
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55 toIntern.intern();
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56 count++;
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57 if (count % 10000 == 0 && count != 0) {
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58 current = System.currentTimeMillis();
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59 System.out.println(new Date(current) + ": interned " + count + " 0-hash strings - last 10000 took " + ((float)(current - last))/1000 + "s (" + ((float)(current - last))/10000000 + "s per String)");
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60 last = current;
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61 }
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62 }
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63 }
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64 if (args[0].equals("normal")) {
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65 while ((toDiscard = br.readLine()) != null) { // do the same read from the file to try and make the test fair
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66 toIntern = new String((new Integer((int)(Math.random() * Integer.MAX_VALUE))).toString());
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67 toIntern.intern();
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68 count++;
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69 if (count % 10000 == 0 && count != 0) {
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70 current = System.currentTimeMillis();
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71 System.out.println(new Date(current) + ": interned " + count + " normal strings - last 10000 took " + ((float)(current - last))/1000 + "s (" + ((float)(current - last))/10000000 + "s per String)");
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72 last = current;
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73 }
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74 }
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75 }
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76 in.close();
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77 }
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78 }
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79
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80
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