1#!/bin/ksh -p 2# 3# CDDL HEADER START 4# 5# This file and its contents are supplied under the terms of the 6# Common Development and Distribution License ("CDDL"), version 1.0. 7# You may only use this file in accordance with the terms of version 8# 1.0 of the CDDL. 9# 10# A full copy of the text of the CDDL should have accompanied this 11# source. A copy of the CDDL is also available via the Internet at 12# http://www.illumos.org/license/CDDL. 13# 14# CDDL HEADER END 15# 16 17. $STF_SUITE/include/libtest.shlib 18. $STF_SUITE/tests/functional/trim/trim.kshlib 19. $STF_SUITE/tests/functional/trim/trim.cfg 20 21# 22# DESCRIPTION: 23# Verify trimming of L2ARC 24# 25# STRATEGY: 26# 1. Set 'l2arc_trim_ahead = 1' and `l2arc_write_size = 64MB`. 27# 2. Create a pool on file vdevs to trim. 28# 3. Verify the cache device was trimmed. 29# 4. Fill the pool with a file larger than the L2ARC vdev. 30# 5. Randomly read the previous written file long enough for the 31# L2ARC vdev to be filled and overwritten 5 times. 32# 6. Verify trim IOs of the expected type were issued for the pool. 33# 7. Verify the allocated space on the cache device is less than 34# its size. 35# 36 37verify_runnable "global" 38 39log_assert "Trim of L2ARC succeeds." 40 41function cleanup 42{ 43 if poolexists $TESTPOOL; then 44 destroy_pool $TESTPOOL 45 fi 46 47 log_must rm -f $VDEVS 48 log_must set_tunable32 L2ARC_TRIM_AHEAD $l2arc_trimahead 49 log_must set_tunable32 L2ARC_WRITE_MAX $l2arc_writemax 50} 51log_onexit cleanup 52 53# The cache device $TRIM_VDEV2 has to be small enough, so that 54# dev->l2ad_hand loops around and dev->l2ad_first=0. Otherwise 55# l2arc_evict() exits before evicting/trimming. 56typeset l2arc_trimahead=$(get_tunable L2ARC_TRIM_AHEAD) 57typeset l2arc_writemax=$(get_tunable L2ARC_WRITE_MAX) 58log_must set_tunable32 L2ARC_TRIM_AHEAD 1 59log_must set_tunable32 L2ARC_WRITE_MAX $((64 * 1024 * 1024)) 60VDEVS="$TRIM_VDEV1 $TRIM_VDEV2" 61log_must truncate -s $((MINVDEVSIZE)) $TRIM_VDEV2 62log_must truncate -s $((4 * MINVDEVSIZE)) $TRIM_VDEV1 63typeset VDEV_MIN_MB=$((MINVDEVSIZE * 0.30 / 1024 / 1024)) 64 65log_must zpool create -f $TESTPOOL $TRIM_VDEV1 cache $TRIM_VDEV2 66verify_vdevs "-le" "$VDEV_MIN_MB" $TRIM_VDEV2 67 68typeset fill_mb=$(( floor(2 * MINVDEVSIZE) )) 69export DIRECTORY=/$TESTPOOL 70export NUMJOBS=1 71export FILE_SIZE=${fill_mb} 72export PERF_RANDSEED=1234 73export PERF_COMPPERCENT=66 74export PERF_COMPCHUNK=0 75export RUNTIME=30 76export BLOCKSIZE=128K 77export SYNC_TYPE=0 78export DIRECT=1 79 80# Write to the pool. 81log_must fio $FIO_SCRIPTS/mkfiles.fio 82 83# Read randomly from the pool to fill L2ARC. 84export RUNTIME=30 85log_must fio $FIO_SCRIPTS/random_reads.fio 86 87export RUNTIME=1 88typeset do_once=true 89while $do_once || [[ $l2_size1 -le $l2_size2 ]]; do 90 typeset l2_size1=$(get_arcstat l2_size) 91 log_must fio $FIO_SCRIPTS/random_reads.fio 92 typeset l2_size2=$(get_arcstat l2_size) 93 do_once=false 94done 95 96verify_trim_io $TESTPOOL "ind" 5 $TRIM_VDEV2 97 98typeset cache_size=$(zpool list -vp | grep $TRIM_VDEV2 | awk '{print $2}') 99typeset cache_alloc=$(zpool list -vp | grep $TRIM_VDEV2 | awk '{print $3}') 100 101log_must test $cache_alloc -lt $cache_size 102 103log_must zpool destroy $TESTPOOL 104log_must rm -f $VDEVS 105 106log_pass "Trim of L2ARC succeeds." 107