| #!/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." |