Date: Fri, 11 Jan 2013 09:25:50 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r245294 - user/pho/stress2/misc Message-ID: <201301110925.r0B9PoQ4045144@svn.freebsd.org>
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Author: pho Date: Fri Jan 11 09:25:50 2013 New Revision: 245294 URL: http://svnweb.freebsd.org/changeset/base/245294 Log: Unmapped I/O test scenario. Added: user/pho/stress2/misc/rot.sh (contents, props changed) Added: user/pho/stress2/misc/rot.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/pho/stress2/misc/rot.sh Fri Jan 11 09:25:50 2013 (r245294) @@ -0,0 +1,138 @@ +#!/bin/sh + +# +# Copyright (c) 2012 Peter Holm <pho@FreeBSD.org> +# 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. +# +# $FreeBSD$ +# + +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +# Unmapped I/O test scenario: +# http://people.freebsd.org/~pho/stress/log/kostik515.txt + +. ../default.cfg + +here=`pwd` +cd /tmp +sed '1,/^EOF/d' < $here/$0 > rot.c +cc -o rot -Wall -Wextra -O2 -g rot.c || exit 1 +rm -f rot.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 2g -u $mdstart || exit 1 +bsdlabel -w md$mdstart auto + +newfs -U md${mdstart}$part > /dev/null + +mount /dev/md${mdstart}$part $mntpoint +chmod 777 $mntpoint + +(cd $mntpoint; /tmp/rot) +(cd /tmp; /tmp/rot) + +while mount | grep $mntpoint | grep -q /dev/md; do + umount $mntpoint || sleep 1 +done +mdconfig -d -u $mdstart +rm -f /tmp/rot +exit +EOF +#include <err.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <sys/mman.h> +#include <sys/wait.h> +#include <unistd.h> + +#define N 10240 /* 40 Mb */ +#define PARALLEL 20 + +int +test(void) +{ + unsigned char *buf; + char path[128]; + int fd, i, j, s; + + s = getpagesize(); + + sprintf(path,"%s.%05d", getprogname(), getpid()); + if ((fd = open(path, O_RDWR | O_CREAT | O_TRUNC, 0600)) < 0) + err(1, "open(%s)", path); + if (lseek(fd, s * N - 1, SEEK_SET) == -1) + err(1, "lseek error"); + + /* write a dummy byte at the last location */ + if (write(fd, "", 1) != 1) + err(1, "write error"); + + for (i = 0; i < N; i++) { + if ((buf = mmap(0, s, PROT_READ | PROT_WRITE, MAP_SHARED, fd, i * s)) == MAP_FAILED) + err(1, "write map"); + for (j = 0; j < s; j++) + buf[j] = i % 256; + } + if (munmap(buf, s) == -1) + err(1, "unmap (write)"); + close(fd); + + if ((fd = open(path, O_RDONLY)) < 0) + err(1, "open(%s)", path); + for (i = 0; i < N; i++) { + if ((buf = mmap(0, s, PROT_READ, MAP_SHARED, fd, i * s)) == MAP_FAILED) + err(1, "write map"); + for (j = 0; j < s; j++) + if (buf[j] != i % 256) + fprintf(stderr, "read %d, expected %d at %d\n", + buf[j], i % 256, i); + } + if (munmap(buf, s) == -1) + err(1, "unmap (read)"); + close(fd); + unlink(path); + + _exit(0); +} + +int +main(void) +{ + int i, j; + + for (j = 0; j < 50; j++) { + for (i = 0; i < PARALLEL; i++) + if (fork() == 0) + test(); + for (i = 0; i < PARALLEL; i++) + wait(NULL); + } + + return(0); +}
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