svn commit: r254643 - user/pho/stress2/misc
Peter Holm
pho at FreeBSD.org
Thu Aug 22 06:28:07 UTC 2013
Author: pho
Date: Thu Aug 22 06:28:07 2013
New Revision: 254643
URL: http://svnweb.freebsd.org/changeset/base/254643
Log:
Added VM test scenario.
Sponsored by: EMC / Isilon storage division
Added:
user/pho/stress2/misc/holdcnt0.sh (contents, props changed)
Added: user/pho/stress2/misc/holdcnt0.sh
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/pho/stress2/misc/holdcnt0.sh Thu Aug 22 06:28:07 2013 (r254643)
@@ -0,0 +1,244 @@
+#!/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.
+#
+# $FreeBSD$
+#
+
+# "panic: cluster_wbuild: page 0xc2eebc10 failed shared busing" seen.
+# "panic: vdrop: holdcnt 0" seen.
+# "panic: cleaned vnode isn't" seen.
+
+# Test scenario suggestion by alc@
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+[ `uname -m` = "i386" ] && exit 0 # Not enough vm
+
+. ../default.cfg
+
+here=`pwd`
+cd /tmp
+sed '1,/^EOF/d' < $here/$0 > holdcnt0.c
+cc -o holdcnt0 -Wall -Wextra -g holdcnt0.c || exit 1
+rm -f holdcnt0.c
+cd $here
+
+mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint
+mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 5g -u $mdstart
+bsdlabel -w md$mdstart auto
+newfs md${mdstart}$part > /dev/null
+mount /dev/md${mdstart}$part $mntpoint
+
+(cd $mntpoint; /tmp/holdcnt0) &
+sleep 5
+while kill -0 $! 2> /dev/null; do
+ (cd ../testcases/swap; ./swap -t 1m -i 1) > /dev/null 2>&1
+done
+wait
+
+while mount | grep -q md${mdstart}$part; do
+ umount $mntpoint || sleep 1
+done
+mdconfig -d -u $mdstart
+rm -f /tmp/holdcnt0
+exit 0
+EOF
+/*
+ A test that causes the page daemon to generate cached pages
+ within a bunch of files and has some consumer that is trying to
+ allocate new pages to the same files.
+*/
+
+#include <sys/types.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+#define BUFSIZE (1024 * 1024)
+#define FILES 200
+#define RPARALLEL 8
+#define WPARALLEL 2
+
+static jmp_buf jbuf;
+off_t maxsize;
+int ps;
+static char *buf;
+volatile char val;
+
+static void
+hand(int i __unused) { /* handler */
+ longjmp(jbuf, 1);
+}
+
+void
+cleanup(void)
+{
+ int i;
+ char file[80];
+
+ for (i = 0; i < FILES; i++) {
+ snprintf(file, sizeof(file), "f%06d", i);
+ unlink(file);
+ }
+}
+
+void
+init(void)
+{
+ char file[80];
+ int fd, i;
+
+ for (i = 0; i < FILES; i++) {
+ snprintf(file, sizeof(file), "f%06d", i);
+ if ((fd = open(file, O_RDWR | O_CREAT | O_TRUNC, 0644)) == -1)
+ err(1, "open(%s)", file);
+ if (write(fd, buf, BUFSIZE) != BUFSIZE)
+ err(1, "write");
+ close(fd);
+ }
+
+}
+
+void
+writer(void)
+{
+ int fd, i;
+ char file[80];
+ time_t start;
+ struct stat statbuf;
+
+ setproctitle("writer");
+ start = time(NULL);
+ while (time(NULL) - start < 600) {
+ for (i = 0; i < FILES; i++) {
+ snprintf(file, sizeof(file), "f%06d", i);
+ if ((fd = open(file, O_RDWR | O_APPEND)) == -1) {
+ if (errno != ENOENT)
+ err(1, "open(%s) append", file);
+ goto err;
+ }
+ if (fstat(fd, &statbuf) < 0)
+ err(1, "fstat error");
+ if (statbuf.st_size < maxsize) {
+ if (write(fd, buf, ps) != ps) {
+ warn("writer");
+ goto err;
+ }
+ }
+ close(fd);
+ }
+ }
+err:
+ cleanup();
+
+ _exit(0);
+}
+
+void
+reader(void)
+{
+ int fd, i, j, n;
+ void *p;
+ size_t len;
+ char file[80];
+ struct stat statbuf;
+
+ setproctitle("reader");
+ signal(SIGSEGV, hand);
+ fd = 0;
+ for (;;) {
+ (void)setjmp(jbuf);
+ for (i = 0; i < FILES; i++) {
+ snprintf(file, sizeof(file), "f%06d", i);
+ if (fd > 0)
+ close(fd);
+ if ((fd = open(file, O_RDWR)) == -1) {
+ if (errno != ENOENT)
+ warn("reader(%s)", file);
+ _exit(0);
+ }
+ if (fstat(fd, &statbuf) < 0)
+ err(1, "fstat error");
+ if (statbuf.st_size >= maxsize) {
+ if (ftruncate(fd, ps) == -1)
+ err(1, "ftruncate");
+ continue;
+ }
+ len = statbuf.st_size;
+ if ((p = mmap(p, len, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED)
+ err(1, "mmap()");
+ close(fd);
+ n = statbuf.st_size / ps;
+ for (j = 0; j < n; j++) {
+ val = *(char *)p;
+ p = p + ps;
+ }
+#if 0
+ if (munmap(p, len) == -1)
+ perror("munmap");
+#endif
+ }
+ }
+ _exit(0);
+}
+int
+main(void)
+{
+ int i;
+
+ maxsize = 2LL * 1024 * 1024 * 1024 / FILES;
+ buf = malloc(BUFSIZE);
+ ps = getpagesize();
+
+ init();
+ for (i = 0; i < WPARALLEL; i++) {
+ if (fork() == 0)
+ writer();
+ }
+ for (i = 0; i < RPARALLEL; i++) {
+ if (fork() == 0)
+ reader();
+ }
+
+ for (i = 0; i < WPARALLEL; i++)
+ wait(NULL);
+ for (i = 0; i < RPARALLEL; i++)
+ wait(NULL);
+
+ free(buf);
+
+ return (0);
+}
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