1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2020 Mark Johnston 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# "panic: Swapdev not found" seen: 31# https://people.freebsd.org/~pho/stress/log/swapoff3.txt 32# Fixed by r358024-6 33 34. ../default.cfg 35[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1 36dir=`dirname $diskimage` 37[ `df -k $dir | tail -1 | awk '{print $4}'` -lt \ 38 $((20 * 1024 * 1024)) ] && 39 { echo "Need 20GB on $dir"; exit 0; } 40 41cat > /tmp/swapoff3.c <<EOF 42#include <sys/param.h> 43#include <sys/mman.h> 44#include <sys/sysctl.h> 45 46#include <assert.h> 47#include <err.h> 48#include <stdlib.h> 49#include <unistd.h> 50 51int 52main(void) 53{ 54 char *addr, *naddr, *res; 55 size_t i, len, swap, vsz; 56 u_int free; 57 58 vsz = sizeof(free); 59 if (sysctlbyname("vm.stats.vm.v_free_count", &free, &vsz, NULL, 0) != 0) 60 err(1, "sysctl(vm.stats.vm.v_free_count)"); 61 vsz = sizeof(swap); 62 if (sysctlbyname("vm.swap_total", &swap, &vsz, NULL, 0) != 0) 63 err(1, "sysctl(vm.swap_total)"); 64 65 len = (size_t)free * PAGE_SIZE + swap / 4; 66 addr = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, 67 -1, 0); 68 if (addr == MAP_FAILED) 69 err(1, "mmap"); 70 71 res = malloc(howmany(len, PAGE_SIZE)); 72 if (res == NULL) 73 err(1, "malloc"); 74 75 for (i = 0; i < len; i += PAGE_SIZE) 76 addr[i] = 1; 77 78 for (;;) { 79 if (mincore(addr, len, res) != 0) 80 err(1, "mincore"); 81 for (i = 0; i < howmany(len, PAGE_SIZE); i++) 82 if ((res[i] & MINCORE_INCORE) == 0) { 83 naddr = addr + i * PAGE_SIZE; 84 if (munmap(naddr, PAGE_SIZE) != 0) 85 err(1, "munmap"); 86 if (mmap(naddr, PAGE_SIZE, 87 PROT_READ | PROT_WRITE, 88 MAP_ANON | MAP_PRIVATE | MAP_FIXED, 89 -1, 0) == MAP_FAILED) 90 err(1, "mmap"); 91 assert(*naddr == 0); 92 *naddr = 1; 93 } 94 } 95 96 return (0); 97} 98EOF 99mycc -o /tmp/swapoff3 -Wall -Wextra -O2 -g /tmp/swapoff3.c || exit 100 101set -e 102md1=$mdstart 103md2=$((md1 + 1)) 104[ `sysctl -n vm.swap_total` -gt 0 ] && { swapoff -a > /dev/null; off=1; } 105truncate -s 10G $dir/swap1 106mdconfig -a -t vnode -f $dir/swap1 -u $md1 107swapon /dev/md$md1 108truncate -s 10G $dir/swap2 109mdconfig -a -t vnode -f $dir/swap2 -u $md2 110swapon /dev/md$md2 111set +e 112 113timeout 4m /tmp/swapoff3 & 114for i in `jot 60`; do 115 n=`swapinfo | tail -1 | awk '{print $3}'` 116 [ $n -gt 0 ] && break 117 sleep 1 118done 119echo "Total in use: $n" 120 121n=0 122start=`date +%s` 123while [ $((`date +%s` - start)) -lt 120 ]; do 124 for dev in /dev/md$md1 /dev/md$md2; do 125 for i in `jot 3`; do 126 swapoff $dev && break 127 done 128 swapon $dev 129 n=$((n + 1)) 130 done 131 sleep .1 132done 133kill $! 134echo "$n swapoffs" 135[ $n -lt 1000 ] && { echo "Only performed $n swapoffs"; s=1; } || s=0 136wait 137for dev in /dev/md$md1 /dev/md$md2; do 138 swapoff $dev 139done 140mdconfig -d -u $md1 141mdconfig -d -u $md2 142rm -f $dir/swap1 $dir/swap2 /tmp/swapoff3 /tmp/swapoff3.c 143[ $off ] && swapon -a > /dev/null 144exit 0 145