root / prex-0.9.0 / usr / sample / bench / bench.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*
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2 | * Copyright (c) 2005-2007, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | /*
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31 | * bench.c - benchmark program for running many threads
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32 | */
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33 | |||
34 | /*
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35 | * Note: The system must have enough memory to run this program.
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36 | * At least, 512M bytes of RAM is required to create 100000 threads
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37 | * with x86-pc.
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38 | */
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39 | |||
40 | #include <sys/prex.h> |
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41 | #include <stdio.h> |
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42 | |||
43 | /*
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44 | * Number of threads
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45 | */
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46 | #define NR_THREADS 10000 |
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47 | |||
48 | static thread_t *thread;
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49 | |||
50 | void
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51 | null_thread(void)
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52 | { |
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53 | for (;;) ;
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54 | } |
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55 | |||
56 | int
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57 | main(int argc, char *argv[]) |
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58 | { |
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59 | struct timerinfo info;
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60 | task_t task; |
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61 | char stack[16]; |
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62 | u_long start, end; |
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63 | int i, pri, error;
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64 | |||
65 | printf("Benchmark to create/terminate %d threads\n", NR_THREADS);
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66 | |||
67 | sys_info(INFO_TIMER, &info); |
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68 | if (info.hz == 0) |
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69 | panic("can not get timer tick rate");
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70 | |||
71 | thread_getpri(thread_self(), &pri); |
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72 | thread_setpri(thread_self(), pri - 1);
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73 | |||
74 | task = task_self(); |
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75 | error = vm_allocate(task, (void **)&thread,
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76 | sizeof(thread_t) * NR_THREADS, 1); |
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77 | if (error)
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78 | panic("vm_allocate is failed");
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79 | |||
80 | sys_time(&start); |
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81 | |||
82 | /*
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83 | * Create threads
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84 | */
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85 | for (i = 0; i < NR_THREADS; i++) { |
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86 | if (thread_create(task, &thread[i]) != 0) |
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87 | panic("thread_create is failed");
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88 | |||
89 | if (thread_load(thread[i], null_thread, &stack) != 0) |
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90 | panic("thread_load is failed");
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91 | |||
92 | if (thread_resume(thread[i]) != 0) |
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93 | panic("thread_resume is failed");
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94 | } |
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95 | |||
96 | /*
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97 | * Teminate threads
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98 | */
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99 | for (i = 0; i < NR_THREADS; i++) |
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100 | thread_terminate(thread[i]); |
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101 | |||
102 | sys_time(&end); |
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103 | |||
104 | vm_free(task, thread); |
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105 | |||
106 | printf("Complete. The score is %d msec (%d ticks).\n",
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107 | (int)((end - start) * 1000 / info.hz), |
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108 | (int)(end - start));
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109 | |||
110 | return 0; |
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111 | } |