svn commit: r257630 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Mon Nov  4 11:48:45 2013
New Revision: 257630
URL: http://svnweb.freebsd.org/changeset/base/257630

Log:
  Added regression test.
  
  Sponsored by:	EMC / Isilon storage division

Added:
  user/pho/stress2/misc/nanosleep.sh   (contents, props changed)

Added: user/pho/stress2/misc/nanosleep.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/nanosleep.sh	Mon Nov  4 11:48:45 2013	(r257630)
@@ -0,0 +1,96 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2013 EMC Corp.
+# 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.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+#
+# $FreeBSD$
+#
+
+# A simplistic regression test for r200510: 
+
+[ `sysctl kern.hz | sed 's/.* //'` -ne 1000 ] && exit 1
+
+here=`pwd`
+cd /tmp
+sed '1,/^EOF/d' < $here/$0 > nanosleep.c
+cc -o nanosleep -Wall -Wextra nanosleep.c || exit 1
+rm -f nanosleep.c
+
+/tmp/nanosleep || exit
+
+rm -f /tmp/nanosleep
+exit 0
+EOF
+#include <err.h>
+#include <strings.h>
+#include <time.h>
+#include <stdio.h>
+#include <sys/limits.h>
+#include <sys/time.h>
+
+#define timespecsub(vvp, uvp)                                           \
+	do {                                                            \
+		(vvp)->tv_sec -= (uvp)->tv_sec;                         \
+		(vvp)->tv_nsec -= (uvp)->tv_nsec;                       \
+		if ((vvp)->tv_nsec < 0) {                               \
+			(vvp)->tv_sec--;                                \
+			(vvp)->tv_nsec += 1000000000;                   \
+		}                                                       \
+	} while (0)
+
+#define N 20000
+
+int
+main(void)
+{
+	struct timespec rqt, rmt;
+	struct timespec start, finish;
+	long m;
+	int i;
+
+	m = LONG_MAX;
+	for (i = 0; i < 100; i++) {
+		rqt.tv_sec  = 0;
+		rqt.tv_nsec = N;
+		clock_gettime(CLOCK_REALTIME_PRECISE, &start);
+		if (nanosleep(&rqt, &rmt) == -1)
+			err(1, "nanosleep");
+		clock_gettime(CLOCK_REALTIME_PRECISE, &finish);
+		timespecsub(&finish, &start);
+		if (finish.tv_nsec < N)
+			errx(1, "Short sleep: %ld", finish.tv_nsec);
+//		fprintf(stderr, "asked for %f, got %f\n", (double)N / 1e9,
+//	  	    (double)finish.tv_nsec / 1e9);
+		if (m > finish.tv_nsec)
+			m = finish.tv_nsec;
+	}
+	if (m > 2 * N) {
+		fprintf(stderr, "nanosleep(%fs). Best value is %fs.\n",
+		    (double)N / 1e9, (double)m / 1e9);
+		errx(1, "FAIL");
+	}
+
+	return (0);
+}