1 /* $NetBSD: softint1.c,v 1.2 2008/04/28 20:23:07 martin Exp $ */
2
3 /*-
4 * Copyright (c) 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Andrew Doran.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Force sched_pstats() to block by acquiring proclist_lock.
34 */
35
36 #include <unistd.h>
37 #include <stdio.h>
38 #include <pthread.h>
39
40 void *thread(void *);
41
42 int desc;
43
44 void *
thread(void * arg)45 thread(void *arg)
46 {
47
48 for (;;) {
49 (void)getppid();
50 }
51
52 return NULL;
53 }
54
55 int
main(int argc,char ** argv)56 main(int argc, char **argv)
57 {
58 pthread_t thr;
59 int nt;
60
61 for (nt = sysconf(_SC_NPROCESSORS_ONLN); nt > 0; nt--) {
62 pthread_create(&thr, NULL, thread, NULL);
63 }
64 sleep(60);
65 printf("Check output of vmstat -e for \"softint clk block\".\n");
66
67 return 0;
68 }
69