1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2018 Dell EMC Isilon 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# Demonstrate disk queue completely full of TRIM commands. 31# "14 seconds elapsed" seen on r337569. 32# Fixed by rxxxxxx. 33 34[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 35trim=$(df -k | sed 1d | sort -rn +3 | awk '{print $NF}' | while read mp; do 36 mount | grep "on $mp " | grep -q ufs || continue 37 on=`mount | grep "on $mp " | awk '{print $1}'` 38 dumpfs $on | head -20 | grep -q trim || continue 39 echo $on && break 40done) 41[ -z "$trim" ] && exit 0 42mp=`mount | grep "$trim " | awk '{print $3}'` 43echo "Found TRIM on $trim mounted as $mp" 44free=`df -k $mp | tail -1 | awk '{print $4}'` 45free=$((free / 1024 / 1024)) # GB 46[ $free -lt 2 ] && exit 0 47expect=-1 48before=`mount -v | grep "$mp "` 49for i in `jot 40`; do 50 t=`date +%s` 51 dd if=/dev/zero of=$mp/trim.data.$i bs=1m count=1k status=none 52 rm $mp/trim.data.$i 53 t=$((`date +%s` - t)) 54 [ $expect -eq -1 ] && expect=$t 55 [ $t -le $((4 * expect)) ] && continue 56 after=`mount -v | grep "$mp "` 57 echo "$t seconds elapsed" 58 echo "Before: $before" 59 echo "After: $after" 60 exit 1 61done 62exit 0 63