4 # SPDX-License-Identifier: BSD-2-Clause-FreeBSD
6 # Copyright (c) 2018 Dell EMC Isilon
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30 # Demonstrate disk queue completely full of TRIM commands.
31 # "14 seconds elapsed" seen on r337569.
34 [ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
35 trim=$(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 $on | head -20 | grep -q trim || continue
41 [ -z "$trim" ] && exit 0
42 mp=`mount | grep "$trim " | awk '{print $3}'`
43 echo "Found TRIM on $trim mounted as $mp"
44 free=`df -k $mp | tail -1 | awk '{print $4}'`
45 free=$((free / 1024 / 1024)) # GB
46 [ $free -lt 2 ] && exit 0
48 before=`mount -v | grep "$mp "`
51 dd if=/dev/zero of=$mp/trim.data.$i bs=1m count=1k status=none
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"