diff options
Diffstat (limited to 'tests/zfs-tests/tests/functional/cache/cache_012_pos.ksh')
| -rwxr-xr-x | tests/zfs-tests/tests/functional/cache/cache_012_pos.ksh | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/tests/zfs-tests/tests/functional/cache/cache_012_pos.ksh b/tests/zfs-tests/tests/functional/cache/cache_012_pos.ksh new file mode 100755 index 000000000000..edefe9c1bf68 --- /dev/null +++ b/tests/zfs-tests/tests/functional/cache/cache_012_pos.ksh @@ -0,0 +1,110 @@ +#!/bin/ksh -p +# +# CDDL HEADER START +# +# This file and its contents are supplied under the terms of the +# Common Development and Distribution License ("CDDL"), version 1.0. +# You may only use this file in accordance with the terms of version +# 1.0 of the CDDL. +# +# A full copy of the text of the CDDL should have accompanied this +# source. A copy of the CDDL is also available via the Internet at +# http://www.illumos.org/license/CDDL. +# +# CDDL HEADER END +# + +# +# Copyright (c) 2020, George Amanakis. All rights reserved. +# + +. $STF_SUITE/tests/functional/cache/cache.cfg +. $STF_SUITE/tests/functional/cache/cache.kshlib + +# +# DESCRIPTION: +# Looping around a cache device with l2arc_write_size exceeding +# the device size succeeds. +# +# STRATEGY: +# 1. Create pool with a cache device. +# 2. Set l2arc_write_max to a value larger than the cache device. +# 3. Create a file larger than the cache device and random read +# for 10 sec. +# 4. Verify that l2arc_write_max is set back to the default. +# 5. Set l2arc_write_max to a value less than the cache device size but +# larger than the default (64MB). +# 6. Record the l2_size. +# 7. Random read for 1 sec. +# 8. Record the l2_size again. +# 9. If (6) <= (8) then we have not looped around yet. +# 10. If (6) > (8) then we looped around. Break out of the loop and test. +# 11. Destroy pool. +# + +verify_runnable "global" + +log_assert "Looping around a cache device succeeds." + +function cleanup +{ + if poolexists $TESTPOOL ; then + destroy_pool $TESTPOOL + fi + + log_must set_tunable32 L2ARC_WRITE_MAX $write_max + log_must set_tunable32 L2ARC_NOPREFETCH $noprefetch +} +log_onexit cleanup + +typeset write_max=$(get_tunable L2ARC_WRITE_MAX) +typeset noprefetch=$(get_tunable L2ARC_NOPREFETCH) +log_must set_tunable32 L2ARC_NOPREFETCH 0 + +typeset VDEV="$VDIR/vdev.disk" +typeset VDEV_SZ=$(( 4 * 1024 * 1024 * 1024 )) +typeset VCACHE="$VDIR/vdev.cache" +typeset VCACHE_SZ=$(( $VDEV_SZ / 2 )) + +typeset fill_mb=$(( floor($VDEV_SZ * 3 / 4 ) )) +export DIRECTORY=/$TESTPOOL +export NUMJOBS=4 +export RUNTIME=10 +export PERF_RANDSEED=1234 +export PERF_COMPPERCENT=66 +export PERF_COMPCHUNK=0 +export BLOCKSIZE=128K +export SYNC_TYPE=0 +export DIRECT=1 +export FILE_SIZE=$(( floor($fill_mb / $NUMJOBS) )) + +log_must set_tunable32 L2ARC_WRITE_MAX $(( $VCACHE_SZ * 2 )) + +log_must truncate -s $VCACHE_SZ $VCACHE +log_must truncate -s $VDEV_SZ $VDEV + +log_must zpool create -f $TESTPOOL $VDEV cache $VCACHE + +log_must fio $FIO_SCRIPTS/mkfiles.fio +log_must fio $FIO_SCRIPTS/random_reads.fio + +typeset write_max2=$(get_tunable L2ARC_WRITE_MAX) + +log_must test $write_max2 -eq $write_max + +log_must set_tunable32 L2ARC_WRITE_MAX $(( 64 * 1024 * 1024 )) +export RUNTIME=1 + +typeset do_once=true +while $do_once || [[ $l2_size1 -le $l2_size2 ]]; do + typeset l2_size1=$(get_arcstat l2_size) + log_must fio $FIO_SCRIPTS/random_reads.fio + typeset l2_size2=$(get_arcstat l2_size) + do_once=false +done + +log_must test $l2_size1 -gt $l2_size2 + +log_must zpool destroy $TESTPOOL + +log_pass "Looping around a cache device succeeds." |