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# 18# Copyright (c) 2020, George Amanakis. All rights reserved. 19# 20 21. $STF_SUITE/tests/functional/cache/cache.cfg 22. $STF_SUITE/tests/functional/cache/cache.kshlib 23 24# 25# DESCRIPTION: 26# Looping around a cache device with l2arc_write_size exceeding 27# the device size succeeds. 28# 29# STRATEGY: 30# 1. Create pool with a cache device. 31# 2. Set l2arc_write_max to a value larger than the cache device. 32# 3. Create a file larger than the cache device and random read 33# for 10 sec. 34# 4. Verify that l2arc_write_max is set back to the default. 35# 5. Set l2arc_write_max to a value less than the cache device size but 36# larger than the default (64MB). 37# 6. Record the l2_size. 38# 7. Random read for 1 sec. 39# 8. Record the l2_size again. 40# 9. If (6) <= (8) then we have not looped around yet. 41# 10. If (6) > (8) then we looped around. Break out of the loop and test. 42# 11. Destroy pool. 43# 44 45verify_runnable "global" 46 47log_assert "Looping around a cache device succeeds." 48 49function cleanup 50{ 51 if poolexists $TESTPOOL ; then 52 destroy_pool $TESTPOOL 53 fi 54 55 log_must set_tunable32 l2arc_write_max $write_max 56 log_must set_tunable32 l2arc_noprefetch $noprefetch 57} 58log_onexit cleanup 59 60typeset write_max=$(get_tunable l2arc_write_max) 61typeset noprefetch=$(get_tunable l2arc_noprefetch) 62log_must set_tunable32 l2arc_noprefetch 0 63 64typeset VDEV="$VDIR/vdev.disk" 65typeset VDEV_SZ=$(( 4 * 1024 * 1024 * 1024 )) 66typeset VCACHE="$VDIR/vdev.cache" 67typeset VCACHE_SZ=$(( $VDEV_SZ / 2 )) 68 69typeset fill_mb=$(( floor($VDEV_SZ * 3 / 4 ) )) 70export DIRECTORY=/$TESTPOOL 71export NUMJOBS=4 72export RUNTIME=10 73export PERF_RANDSEED=1234 74export PERF_COMPPERCENT=66 75export PERF_COMPCHUNK=0 76export BLOCKSIZE=128K 77export SYNC_TYPE=0 78export DIRECT=1 79export FILE_SIZE=$(( floor($fill_mb / $NUMJOBS) )) 80 81log_must set_tunable32 l2arc_write_max $(( $VCACHE_SZ * 2 )) 82 83log_must truncate -s $VCACHE_SZ $VCACHE 84log_must truncate -s $VDEV_SZ $VDEV 85 86log_must zpool create -f $TESTPOOL $VDEV cache $VCACHE 87 88log_must fio $FIO_SCRIPTS/mkfiles.fio 89log_must fio $FIO_SCRIPTS/random_reads.fio 90 91typeset write_max2=$(get_tunable l2arc_write_max) 92 93log_must test $write_max2 -eq $write_max 94 95log_must set_tunable32 l2arc_write_max $(( 64 * 1024 * 1024 )) 96export RUNTIME=1 97 98typeset do_once=true 99while $do_once || [[ $l2_size1 -le $l2_size2 ]]; do 100 typeset l2_size1=$(get_arcstat l2_size) 101 log_must fio $FIO_SCRIPTS/random_reads.fio 102 typeset l2_size2=$(get_arcstat l2_size) 103 do_once=false 104done 105 106log_must test $l2_size1 -gt $l2_size2 107 108log_must zpool destroy $TESTPOOL 109 110log_pass "Looping around a cache device succeeds." 111