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      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 *
     45 thread(void *arg)
     46 {
     47 
     48 	for (;;) {
     49 		(void)getppid();
     50 	}
     51 
     52 	return NULL;
     53 }
     54 
     55 int
     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