Date: Tue, 13 Mar 2018 12:35:37 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r330840 - user/pho/stress2/misc Message-ID: <201803131235.w2DCZbif088935@repo.freebsd.org>
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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); +}
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