On Thu, Mar 16, 2017 at 09:50:25AM +0800, Qu Wenruo wrote:
> Add basic test for btrfs in-band de-duplication(inmemory backend), including:
> 1) Enable
> 3) Dedup rate
> 4) File correctness
> 5) Disable
>
> Signed-off-by: Qu Wenruo <quwenruo@xxxxxxxxxxxxxx>
I haven't looked into this patchset closely, this may need more help
from other btrfs developers. Some comments from my first round
eyeballing review :)
> ---
> common/defrag | 13 ++++++
> tests/btrfs/200 | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++++
> tests/btrfs/200.out | 22 ++++++++++
> tests/btrfs/group | 2 +
> 4 files changed, 153 insertions(+)
> create mode 100755 tests/btrfs/200
> create mode 100644 tests/btrfs/200.out
>
> diff --git a/common/defrag b/common/defrag
> index d279382f..0a41714f 100644
> --- a/common/defrag
> +++ b/common/defrag
> @@ -59,6 +59,19 @@ _extent_count()
> $XFS_IO_PROG -c "fiemap" $1 | tail -n +2 | grep -v hole | wc -l| $AWK_PROG '{print $1}'
> }
>
> +# Get the number of unique file extents
> +# Unique file extents means they have different ondisk bytenr
> +# Some filesystem supports reflinkat() or in-band de-dup can create
> +# a file whose all file extents points to the same ondisk bytenr
> +# this can be used to test if such reflinkat() or in-band de-dup works
> +_extent_count_uniq()
> +{
> + file=$1
Declare local vars as "local".
> + $XFS_IO_PROG -c "fiemap" $file >> $seqres.full 2>&1
> + $XFS_IO_PROG -c "fiemap" $file | tail -n +2 | grep -v hole |\
> + $AWK_PROG '{print $3}' | sort | uniq | wc -l
> +}
> +
> _check_extent_count()
> {
> min=$1
> diff --git a/tests/btrfs/200 b/tests/btrfs/200
> new file mode 100755
> index 00000000..1b3e46fd
> --- /dev/null
> +++ b/tests/btrfs/200
> @@ -0,0 +1,116 @@
> +#! /bin/bash
> +# FS QA Test 200
> +#
> +# Basic btrfs inband dedupe test for inmemory backend
> +#
> +#-----------------------------------------------------------------------
> +# Copyright (c) 2016 Fujitsu. All Rights Reserved.
> +#
> +# This program is free software; you can redistribute it and/or
> +# modify it under the terms of the GNU General Public License as
> +# published by the Free Software Foundation.
> +#
> +# This program is distributed in the hope that it would be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> +# GNU General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program; if not, write the Free Software Foundation,
> +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
> +#-----------------------------------------------------------------------
> +#
> +
> +seq=`basename $0`
> +seqres=$RESULT_DIR/$seq
> +echo "QA output created by $seq"
> +
> +here=`pwd`
> +tmp=/tmp/$$
> +status=1 # failure is the default!
> +trap "_cleanup; exit \$status" 0 1 2 3 15
> +
> +_cleanup()
> +{
> + cd /
> + rm -f $tmp.*
> +}
> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +. ./common/defrag
> +
> +# remove previous $seqres.full before test
> +rm -f $seqres.full
> +
> +# real QA test starts here
> +
> +_supported_fs btrfs
> +_supported_os Linux
> +_require_scratch
> +_require_btrfs_command dedupe
> +_require_btrfs_fs_feature dedupe
> +
> +# File size is twice the maximum file extent of btrfs
> +# So even fallbacked to non-dedupe, it will have at least 2 extents
> +file_size=256m
> +
> +_scratch_mkfs >> $seqres.full 2>&1
> +_scratch_mount
> +
> +do_dedupe_test()
> +{
> + dedupe_bs=$1
> +
> + echo "Testing inmemory dedupe backend with block size $dedupe_bs"
> + _run_btrfs_util_prog dedupe enable -f -s inmemory -b $dedupe_bs \
> + $SCRATCH_MNT
> + # do sync write to ensure dedupe hash is added into dedupe pool
> + $XFS_IO_PROG -f -c "pwrite -b $dedupe_bs 0 $dedupe_bs" -c "fsync"\
> + $SCRATCH_MNT/initial_block | _filter_xfs_io
> +
> + # do sync write to ensure we can get stable fiemap later
> + $XFS_IO_PROG -f -c "pwrite -b $dedupe_bs 0 $file_size" -c "fsync"\
> + $SCRATCH_MNT/real_file | _filter_xfs_io
> +
> + # Test if real_file is de-duplicated
> + nr_uniq_extents=$(_extent_count_uniq $SCRATCH_MNT/real_file)
> + nr_total_extents=$(_extent_count $SCRATCH_MNT/real_file)
> + nr_deduped_extents=$(($nr_total_extents - $nr_uniq_extents))
> +
> + echo "deduped/total: $nr_deduped_extents/$nr_total_extents" \
> + >> $seqres.full
> + # Allow a small amount of dedupe miss, as commit interval or
> + # memory pressure may break a dedupe_bs block and cause
> + # small extent which won't go through dedupe routine
> + _within_tolerance "number of deduped extents" $nr_deduped_extents \
> + $nr_total_extents 5% -v
> +
> + # Also check the md5sum to ensure data is not corrupted
> + md5=$(_md5_checksum $SCRATCH_MNT/real_file)
> + echo "md5sum: $md5"
> +}
> +
> +# Test inmemory dedupe first, use 64K dedupe bs to keep compatibility
> +# with 64K page size
> +do_dedupe_test 64K
> +
> +# Test 128K(default) dedupe bs
> +do_dedupe_test 128K
> +
> +# Test 1M dedupe bs
> +do_dedupe_test 1M
> +
> +# Check dedupe disable
> +_run_btrfs_util_prog dedupe disable $SCRATCH_MNT
> +
> +# success, all done
> +status=0
> +exit
> +# Check dedupe disable
> +_run_btrfs_util_prog dedupe disable $SCRATCH_MNT
> +
> +# success, all done
> +status=0
> +exit
Double "dedupe disable" and "exit".
> diff --git a/tests/btrfs/200.out b/tests/btrfs/200.out
> new file mode 100644
> index 00000000..e09e5733
> --- /dev/null
> +++ b/tests/btrfs/200.out
> @@ -0,0 +1,22 @@
> +QA output created by 200
> +Testing inmemory dedupe backend with block size 64K
> +wrote 65536/65536 bytes at offset 0
> +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +wrote 268435456/268435456 bytes at offset 0
> +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +number of deduped extents is in range
> +md5sum: a30e0f3f1b0884081de11d4357811c2e
> +Testing inmemory dedupe backend with block size 128K
> +wrote 131072/131072 bytes at offset 0
> +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +wrote 268435456/268435456 bytes at offset 0
> +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +number of deduped extents is in range
> +md5sum: a30e0f3f1b0884081de11d4357811c2e
> +Testing inmemory dedupe backend with block size 1M
> +wrote 1048576/1048576 bytes at offset 0
> +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +wrote 268435456/268435456 bytes at offset 0
> +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +number of deduped extents is in range
> +md5sum: a30e0f3f1b0884081de11d4357811c2e
> diff --git a/tests/btrfs/group b/tests/btrfs/group
> index 76a1181e..bf001d3c 100644
> --- a/tests/btrfs/group
> +++ b/tests/btrfs/group
> @@ -125,6 +125,7 @@
> 120 auto quick snapshot metadata
> 121 auto quick snapshot qgroup
> 122 auto quick snapshot qgroup
> +<<<<<<< HEAD
Leftover from resolving conflicts?
Thanks,
Eryu
> 123 auto quick qgroup
> 124 auto replace
> 125 auto replace
> @@ -141,3 +142,4 @@
> 136 auto convert
> 137 auto quick send
> 138 auto compress
> +200 auto ib-dedupe
> --
> 2.12.0
>
>
>
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