svn commit: r298916 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Mon May  2 05:27:54 2016
New Revision: 298916
URL: https://svnweb.freebsd.org/changeset/base/298916

Log:
  Added a regression test.
  
  Sponsored by:	EMC / Isilon Storage Division

Added:
  user/pho/stress2/misc/mmap27.sh   (contents, props changed)

Added: user/pho/stress2/misc/mmap27.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/mmap27.sh	Mon May  2 05:27:54 2016	(r298916)
@@ -0,0 +1,128 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2016 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.
+#
+# $FreeBSD$
+#
+
+# 'WARNING: A device driver has set "memattr" inconsistently.' seen on
+# console.
+# https://people.freebsd.org/~pho/stress/log/mmap27.txt
+# Fixed by r298891.
+
+. ../default.cfg
+
+odir=`pwd`
+cd /tmp
+sed '1,/^EOF/d' < $odir/$0 > mmap27.c
+mycc -o mmap27 -Wall -Wextra -g -O0 mmap27.c || exit 1
+rm -f mmap27.c
+cd $odir
+
+daemon sh -c '(cd ../testcases/swap; ./swap -t 2m -i 20 -l 100)' > /dev/null 2>&1
+sleep 2
+/tmp/mmap27
+while pgrep -q swap; do
+	pkill -9 swap
+done
+rm -f ./mmap27 /tmp/mmap27.0*
+exit 0
+
+EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+int fd;
+
+#define ADRSPACE  (256 * 1024 * 1024 )
+#define PARALLEL 64
+#define RUNTIME 120
+#define STARTADDR 0x50000000U
+
+static void
+work(void)
+{
+	size_t left, len;
+	int i;
+	char *p;
+	volatile char val;
+
+	if ((fd = open("/dev/mem", O_RDWR)) == -1)
+		err(1,"open()");
+
+	p = (void *)STARTADDR + trunc_page(arc4random() % ADRSPACE);
+	left = ADRSPACE - (size_t)p + STARTADDR;
+	len = trunc_page(arc4random() % left) + PAGE_SIZE;
+
+	if ((p = mmap(p, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) ==
+			MAP_FAILED) {
+		if (errno == ENOMEM)
+			return;
+		err(1, "mmap()");
+	}
+
+	for (i = 0; i < 100; i++)
+		val = p[arc4random() % len];
+
+	if (munmap(p, len) == -1)
+		err(1, "munmap(%p)", p);
+
+	_exit(0);
+}
+
+int
+main(void)
+{
+	pid_t pids[PARALLEL];
+	time_t start;
+	int i, n;
+
+	start = time(NULL);
+	while (time(NULL) - start < RUNTIME) {
+		n = arc4random() % PARALLEL + 1;
+		for (i = 0; i < n; i++) {
+			if ((pids[i] = fork()) == 0)
+				work();
+		}
+
+		for (i = 0; i < n; i++)
+			if (waitpid(pids[i], NULL, 0) != pids[i])
+				err(1, "waitpid(%d)", pids[i]);
+	}
+	close(fd);
+
+	return (0);
+}