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l2arc_evict() performs the adjustment of the size of buffers to be written on L2ARC unnecessarily. l2arc_write_size() is called right before l2arc_evict() and performs those adjustments. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Brian Atkinson <batkinson@lanl.gov> Signed-off-by: George Amanakis <gamanakis@gmail.com> Closes #14828
109 lines
3.1 KiB
Bash
Executable File
109 lines
3.1 KiB
Bash
Executable File
#!/bin/ksh -p
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#
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# CDDL HEADER START
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#
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# This file and its contents are supplied under the terms of the
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# Common Development and Distribution License ("CDDL"), version 1.0.
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# You may only use this file in accordance with the terms of version
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# 1.0 of the CDDL.
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#
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# A full copy of the text of the CDDL should have accompanied this
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# source. A copy of the CDDL is also available via the Internet at
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# http://www.illumos.org/license/CDDL.
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#
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# CDDL HEADER END
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#
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. $STF_SUITE/include/libtest.shlib
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. $STF_SUITE/tests/functional/trim/trim.kshlib
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. $STF_SUITE/tests/functional/trim/trim.cfg
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#
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# DESCRIPTION:
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# Verify trimming of L2ARC
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#
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# STRATEGY:
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# 1. Set 'l2arc_trim_ahead = 1' and `l2arc_write_size = 64MB`.
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# 2. Create a pool on file vdevs to trim.
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# 3. Verify the cache device was trimmed.
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# 4. Fill the pool with a file larger than the L2ARC vdev.
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# 5. Randomly read the previous written file long enough for the
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# L2ARC vdev to be filled and overwritten 5 times.
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# 6. Verify trim IOs of the expected type were issued for the pool.
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# 7. Verify the allocated space on the cache device is less than
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# its size.
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#
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verify_runnable "global"
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command -v fio > /dev/null || log_unsupported "fio missing"
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log_assert "Trim of L2ARC succeeds."
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function cleanup
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{
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if poolexists $TESTPOOL; then
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destroy_pool $TESTPOOL
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fi
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log_must rm -f $VDEVS
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log_must set_tunable32 L2ARC_TRIM_AHEAD $l2arc_trimahead
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log_must set_tunable32 L2ARC_WRITE_MAX $l2arc_writemax
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}
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log_onexit cleanup
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# The cache device $TRIM_VDEV2 has to be small enough, so that
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# dev->l2ad_hand loops around and dev->l2ad_first=0. Otherwise
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# l2arc_evict() exits before evicting/trimming.
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typeset l2arc_trimahead=$(get_tunable L2ARC_TRIM_AHEAD)
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typeset l2arc_writemax=$(get_tunable L2ARC_WRITE_MAX)
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log_must set_tunable32 L2ARC_TRIM_AHEAD 1
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log_must set_tunable32 L2ARC_WRITE_MAX $((64 * 1024 * 1024))
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VDEVS="$TRIM_VDEV1 $TRIM_VDEV2"
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log_must truncate -s $((MINVDEVSIZE)) $TRIM_VDEV2
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log_must truncate -s $((4 * MINVDEVSIZE)) $TRIM_VDEV1
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typeset VDEV_MIN_MB=$((MINVDEVSIZE * 0.30 / 1024 / 1024))
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log_must zpool create -f $TESTPOOL $TRIM_VDEV1 cache $TRIM_VDEV2
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verify_vdevs "-le" "$VDEV_MIN_MB" $TRIM_VDEV2
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typeset fill_mb=$(( floor(3 * MINVDEVSIZE) ))
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export DIRECTORY=/$TESTPOOL
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export NUMJOBS=1
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export FILE_SIZE=${fill_mb}
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export PERF_RANDSEED=1234
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export PERF_COMPPERCENT=66
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export PERF_COMPCHUNK=0
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export RUNTIME=30
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export BLOCKSIZE=128K
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export SYNC_TYPE=0
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export DIRECT=1
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# Write to the pool.
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log_must fio $FIO_SCRIPTS/mkfiles.fio
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# Read randomly from the pool to fill L2ARC.
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export RUNTIME=30
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log_must fio $FIO_SCRIPTS/random_reads.fio
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export RUNTIME=1
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typeset do_once=true
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while $do_once || [[ $l2_size1 -le $l2_size2 ]]; do
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typeset l2_size1=$(get_arcstat l2_size)
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log_must fio $FIO_SCRIPTS/random_reads.fio
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typeset l2_size2=$(get_arcstat l2_size)
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do_once=false
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done
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verify_trim_io $TESTPOOL "ind" 5 $TRIM_VDEV2
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typeset cache_size cache_alloc _
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read -r _ cache_size cache_alloc _ < <(zpool list -vp | grep $TRIM_VDEV2)
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log_must test $cache_alloc -lt $cache_size
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log_must zpool destroy $TESTPOOL
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log_must rm -f $VDEVS
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log_pass "Trim of L2ARC succeeds."
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