svn commit: r330840 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Tue Mar 13 12:35:37 2018
New Revision: 330840
URL: https://svnweb.freebsd.org/changeset/base/330840

Log:
  Added a kevent(2) test, which has triggered a OOM problem.
  
  Sponsored by:	Dell EMC Isilon

Added:
  user/pho/stress2/misc/kevent11.sh   (contents, props changed)

Added: user/pho/stress2/misc/kevent11.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/kevent11.sh	Tue Mar 13 12:35:37 2018	(r330840)
@@ -0,0 +1,181 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2017 Dell EMC Isilon
+# 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.
+#
+# $FreeBSD$
+#
+
+# Variation of kevent5.sh
+# OOM seen: https://people.freebsd.org/~pho/stress/log/mark018.txt
+
+. ../default.cfg
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/kevent11.c
+mycc -o kevent11 -Wall -Wextra -O0 -g kevent11.c || exit 1
+rm -f kevent11.c
+cd $odir
+
+set -e
+mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
+[ -c /dev/md$mdstart ] &&  mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 2g -u $mdstart
+bsdlabel -w md$mdstart auto
+newfs $newfs_flags md${mdstart}$part > /dev/null
+mount /dev/md${mdstart}$part $mntpoint
+set +e
+
+(cd $odir/../testcases/swap; ./swap -t 5m -i 20 -h -l 100 > /dev/null) &
+cd $mntpoint
+$dir/kevent11
+s=$?
+[ -f kevent11.core -a $s -eq 0 ] &&
+    { ls -l kevent11.core; mv kevent11.core /tmp; s=1; }
+cd $odir
+while pkill -9 swap; do :; done
+wait
+
+for i in `jot 6`; do
+	mount | grep -q "on $mntpoint " || break
+	umount $mntpoint && break || sleep 10
+done
+[ $i -eq 6 ] && exit 1
+mdconfig -d -u $mdstart
+rm -rf $dir/kevent11
+exit $s
+
+EOF
+#include <sys/param.h>
+#include <sys/event.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <machine/atomic.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>
+
+static volatile u_int *share;
+static char *file = "file";
+
+#define PARALLEL 256
+#define RUNTIME (3 * 60)
+#define SYNC 0
+
+static void
+test(void)
+{
+        struct kevent ev[2];
+        struct timespec ts;
+        int kq = -1;
+        int fd, n;
+
+	if ((fd = open(file, O_RDONLY, 0)) == -1)
+		err(1, "open(%s). %s:%d", file, __func__, __LINE__);
+
+	if ((kq = kqueue()) < 0)
+		err(1, "kqueue()");
+
+	n = 0;
+	EV_SET(&ev[n], fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR,
+		NOTE_DELETE, 0, 0);
+	n++;
+
+	if (kevent(kq, ev, n, NULL, 0, NULL) < 0)
+		err(1, "kevent()");
+
+	setproctitle("presync");
+	atomic_add_int(&share[SYNC], 1);
+	while (share[SYNC] != PARALLEL)
+		usleep(10000);
+	setproctitle("postsync");
+
+	memset(&ev, 0, sizeof(ev));
+	n = kevent(kq, NULL, 0, ev, 1, &ts);
+	close(fd);
+	close(kq);
+
+	_exit(0);
+}
+
+int
+main(void)
+{
+	pid_t pids[PARALLEL];
+	size_t len;
+	time_t start;
+	int e, fd, i, status;
+
+	e = 0;
+	len = PAGE_SIZE;
+	if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
+	    MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+		err(1, "mmap");
+
+	start = time(NULL);
+	while ((time(NULL) - start) < RUNTIME && e == 0) {
+		if ((fd = open(file, O_CREAT | O_TRUNC | O_RDWR, 0660)) ==
+		    -1)
+			err(1, "open(%s)", file);
+		close(fd);
+		share[SYNC] = 0;
+		for (i = 0; i < PARALLEL; i++) {
+
+			if ((pids[i] = fork()) == 0)
+				test();
+			if (pids[i] == -1)
+				err(1, "fork()");
+		}
+		while (share[SYNC] != PARALLEL)
+			usleep(10000);
+		if (unlink(file) == -1)
+			err(1, "unlink(%s). %s:%d\n", file,
+				    __FILE__, __LINE__);
+		for (i = 0; i < PARALLEL; i++) {
+			if (waitpid(pids[i], &status, 0) == -1)
+				err(1, "waitpid(%d)", pids[i]);
+			if (status != 0) {
+				if (WIFSIGNALED(status))
+					fprintf(stderr,
+					    "pid %d exit signal %d\n",
+					    pids[i], WTERMSIG(status));
+			}
+			e += status == 0 ? 0 : 1;
+		}
+	}
+
+	return (e);
+}