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
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.
18 # Copyright (c) 2020, George Amanakis. All rights reserved.
21 . $STF_SUITE/tests/functional/cache/cache.cfg
22 . $STF_SUITE/tests/functional/cache/cache.kshlib
26 # Looping around a cache device with l2arc_write_size exceeding
27 # the device size succeeds.
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
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.
45 verify_runnable "global"
47 log_assert "Looping around a cache device succeeds."
51 if poolexists $TESTPOOL ; then
52 destroy_pool $TESTPOOL
55 log_must set_tunable32 L2ARC_WRITE_MAX $write_max
56 log_must set_tunable32 L2ARC_NOPREFETCH $noprefetch
60 typeset write_max=$(get_tunable L2ARC_WRITE_MAX)
61 typeset noprefetch=$(get_tunable L2ARC_NOPREFETCH)
62 log_must set_tunable32 L2ARC_NOPREFETCH 0
64 typeset VDEV="$VDIR/vdev.disk"
65 typeset VDEV_SZ=$(( 4 * 1024 * 1024 * 1024 ))
66 typeset VCACHE="$VDIR/vdev.cache"
67 typeset VCACHE_SZ=$(( $VDEV_SZ / 2 ))
69 typeset fill_mb=$(( floor($VDEV_SZ * 3 / 4 ) ))
70 export DIRECTORY=/$TESTPOOL
73 export PERF_RANDSEED=1234
74 export PERF_COMPPERCENT=66
75 export PERF_COMPCHUNK=0
79 export FILE_SIZE=$(( floor($fill_mb / $NUMJOBS) ))
81 log_must set_tunable32 L2ARC_WRITE_MAX $(( $VCACHE_SZ * 2 ))
83 log_must truncate -s $VCACHE_SZ $VCACHE
84 log_must truncate -s $VDEV_SZ $VDEV
86 log_must zpool create -f $TESTPOOL $VDEV cache $VCACHE
88 log_must fio $FIO_SCRIPTS/mkfiles.fio
89 log_must fio $FIO_SCRIPTS/random_reads.fio
91 typeset write_max2=$(get_tunable L2ARC_WRITE_MAX)
93 log_must test $write_max2 -eq $write_max
95 log_must set_tunable32 L2ARC_WRITE_MAX $(( 64 * 1024 * 1024 ))
99 while $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)
106 log_must test $l2_size1 -gt $l2_size2
108 log_must zpool destroy $TESTPOOL
110 log_pass "Looping around a cache device succeeds."