648db22b |
1 | # !/bin/sh |
2 | set -e |
3 | |
4 | # Benchmarks run on a Ubuntu 14.04 VM with 2 cores and 4 GiB of RAM. |
5 | # The VM is running on a Macbook Pro with a 3.1 GHz Intel Core i7 processor and |
6 | # 16 GB of RAM and an SSD. |
7 | |
8 | # silesia is a directory that can be downloaded from |
9 | # http://mattmahoney.net/dc/silesia.html |
10 | # ls -l silesia/ |
11 | # total 203M |
12 | # -rwxr-xr-x 1 terrelln 9.8M Apr 12 2002 dickens |
13 | # -rwxr-xr-x 1 terrelln 49M May 31 2002 mozilla |
14 | # -rwxr-xr-x 1 terrelln 9.6M Mar 20 2003 mr |
15 | # -rwxr-xr-x 1 terrelln 32M Apr 2 2002 nci |
16 | # -rwxr-xr-x 1 terrelln 5.9M Jul 4 2002 ooffice |
17 | # -rwxr-xr-x 1 terrelln 9.7M Apr 11 2002 osdb |
18 | # -rwxr-xr-x 1 terrelln 6.4M Apr 2 2002 reymont |
19 | # -rwxr-xr-x 1 terrelln 21M Mar 25 2002 samba |
20 | # -rwxr-xr-x 1 terrelln 7.0M Mar 24 2002 sao |
21 | # -rwxr-xr-x 1 terrelln 40M Mar 25 2002 webster |
22 | # -rwxr-xr-x 1 terrelln 8.1M Apr 4 2002 x-ray |
23 | # -rwxr-xr-x 1 terrelln 5.1M Nov 30 2000 xml |
24 | |
25 | # $HOME is on a ext4 filesystem |
26 | BENCHMARK_DIR="$HOME/silesia/" |
27 | N=10 |
28 | |
29 | # Normalize the environment |
30 | sudo umount /mnt/btrfs 2> /dev/null > /dev/null || true |
31 | sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs |
32 | sudo rm -rf /mnt/btrfs/* |
33 | sync |
34 | sudo umount /mnt/btrfs |
35 | sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs |
36 | |
37 | # Run the benchmark |
38 | echo "Compression" |
39 | time sh -c "for i in \$(seq $N); do sudo cp -r $BENCHMARK_DIR /mnt/btrfs/\$i; done; sync" |
40 | |
41 | echo "Approximate compression ratio" |
42 | printf "%d / %d\n" \ |
43 | $(df /mnt/btrfs --output=used -B 1 | tail -n 1) \ |
44 | $(sudo du /mnt/btrfs -b -d 0 | tr '\t' '\n' | head -n 1); |
45 | |
46 | # Unmount and remount to avoid any caching |
47 | sudo umount /mnt/btrfs |
48 | sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs |
49 | |
50 | echo "Decompression" |
51 | time sudo tar -c /mnt/btrfs 2> /dev/null | wc -c > /dev/null |
52 | |
53 | sudo rm -rf /mnt/btrfs/* |
54 | sudo umount /mnt/btrfs |
55 | |
56 | # Run for each of -o compress-force={none, lzo, zlib, zstd} 5 times and take the |
57 | # min time and ratio. |
58 | # Ran zstd with compression levels {1, 3, 6, 9, 12, 15}. |
59 | # Original size: 2119415342 B (using du /mnt/btrfs) |
60 | |
61 | # none |
62 | # compress: 4.205 s |
63 | # decompress: 3.090 s |
64 | # ratio: 0.99 |
65 | |
66 | # lzo |
67 | # compress: 5.328 s |
68 | # decompress: 4.793 s |
69 | # ratio: 1.66 |
70 | |
71 | # zlib |
72 | # compress: 32.588 s |
73 | # decompress: 8.791 s |
74 | # ratio : 2.58 |
75 | |
76 | # zstd 1 |
77 | # compress: 8.147 s |
78 | # decompress: 5.527 s |
79 | # ratio : 2.57 |
80 | |
81 | # zstd 3 |
82 | # compress: 12.207 s |
83 | # decompress: 5.195 s |
84 | # ratio : 2.71 |
85 | |
86 | # zstd 6 |
87 | # compress: 30.253 s |
88 | # decompress: 5.324 s |
89 | # ratio : 2.87 |
90 | |
91 | # zstd 9 |
92 | # compress: 49.659 s |
93 | # decompress: 5.220 s |
94 | # ratio : 2.92 |
95 | |
96 | # zstd 12 |
97 | # compress: 99.245 s |
98 | # decompress: 5.193 s |
99 | # ratio : 2.93 |
100 | |
101 | # zstd 15 |
102 | # compress: 196.997 s |
103 | # decompress: 5.992 s |
104 | # ratio : 3.01 |