Annotation of prex/usr/sample/bench/bench.c, Revision 1.1.1.1
1.1 nbrk 1: /*
2: * Copyright (c) 2005-2007, Kohsuke Ohtani
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: /*
31: * bench.c - benchmark program for running many threads
32: */
33:
34: /*
35: * Note: The system must have enough memory to run this program.
36: * At least, 512M bytes of RAM is required to create 100000 threads
37: * with i386-pc.
38: */
39:
40: #include <prex/prex.h>
41: #include <stdio.h>
42:
43: /*
44: * Number of threads
45: */
46: #define NR_THREADS 100000
47:
48: static thread_t *th;
49:
50: void
51: null_thread(void)
52: {
53: for (;;) ;
54: }
55:
56: int
57: main(int argc, char *argv[])
58: {
59: struct info_timer info;
60: task_t task;
61: char stack[16];
62: u_long start, end;
63: int i, prio, err;
64:
65: printf("Benchmark to create/terminate %d threads\n", NR_THREADS);
66:
67: sys_info(INFO_TIMER, &info);
68: if (info.hz == 0)
69: panic("can not get timer tick rate");
70:
71: thread_getprio(thread_self(), &prio);
72: thread_setprio(thread_self(), prio - 1);
73:
74: task = task_self();
75: err = vm_allocate(task, (void **)&th, sizeof(thread_t) * NR_THREADS, 1);
76: if (err)
77: panic("vm_allocate is failed");
78:
79: sys_time(&start);
80:
81: /*
82: * Create threads
83: */
84: for (i = 0; i < NR_THREADS; i++) {
85: if (thread_create(task, &th[i]) != 0)
86: panic("thread_create is failed");
87:
88: if (thread_load(th[i], null_thread, &stack) != 0)
89: panic("thread_load is failed");
90:
91: if (thread_resume(th[i]) != 0)
92: panic("thread_resume is failed");
93: }
94:
95: /*
96: * Teminate threads
97: */
98: for (i = 0; i < NR_THREADS; i++)
99: thread_terminate(th[i]);
100:
101: sys_time(&end);
102:
103: vm_free(task, th);
104:
105: printf("Complete. The score is %d msec (%d ticks).\n",
106: (int)((end - start) * 1000 / info.hz),
107: (int)(end - start));
108:
109: return 0;
110: }
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