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A test for the lwpctl preemption counter.

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This commit is contained in:
ad 2008-03-12 11:02:21 +00:00
parent 727b89a296
commit 2dc7c918f0
3 changed files with 80 additions and 2 deletions
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4
regress/sys/kern/Makefile
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@ -1,6 +1,6 @@
# $NetBSD: Makefile,v 1.27 2006/09/10 12:23:10 kardel Exp $
# $NetBSD: Makefile,v 1.28 2008/03/12 11:02:21 ad Exp $
SUBDIR+= execve extent getcwd ipf kqueue lock lockf pipe poll ras \
SUBDIR+= execve extent getcwd kqueue lock lockf lwpctl pipe poll ras \
sigtramp sleeping sysvmsg sysvsem sysvshm time ucontext umount \
unfdpass writev

11
regress/sys/kern/lwpctl/Makefile Normal file
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@ -0,0 +1,11 @@
# $NetBSD: Makefile,v 1.1 2008/03/12 11:02:21 ad Exp $
NOMAN= # defined
PROG= lwpctl
WARNS= 4
regress:
@./${PROG}
.include <bsd.prog.mk>

67
regress/sys/kern/lwpctl/lwpctl.c Normal file
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/* $NetBSD: lwpctl.c,v 1.1 2008/03/12 11:02:21 ad Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/lwpctl.h>
#include <lwp.h>
#include <stdio.h>
#include <unistd.h>
#include <err.h>
int
main(void)
{
lwpctl_t *lc;
struct timespec ts;
int ctr1, ctr2;
if (_lwp_ctl(LWPCTL_FEATURE_PCTR, &lc) != 0)
err(1, "_lwp_ctl");
/* Ensure that preemption is reported. */
ctr1 = lc->lc_pctr;
printf("pctr = %d\n", ctr1);
ts.tv_nsec = 10*1000000;
ts.tv_sec = 0;
nanosleep(&ts, 0);
ctr2 = lc->lc_pctr;
printf("pctr = %d\n", ctr2);
if (ctr1 == ctr2)
errx(1, "counters match");
return 0;
}