| 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 | # $HOME is on a ext4 filesystem |
| 26 | BENCHMARK_FILE="linux-4.11.6.tar" |
| 27 | BENCHMARK_DIR="$HOME/$BENCHMARK_FILE" |
| 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 "Copy" |
| 39 | time sh -c "sudo cp -r $BENCHMARK_DIR /mnt/btrfs/$BENCHMARK_FILE && sync" |
| 40 | |
| 41 | echo "Approximate tarred 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 $@ /dev/sda3 /mnt/btrfs |
| 49 | |
| 50 | echo "Extract" |
| 51 | time sh -c "sudo tar -C /mnt/btrfs -xf /mnt/btrfs/$BENCHMARK_FILE && sync" |
| 52 | |
| 53 | # Remove the tarball, leaving only the extracted data |
| 54 | sudo rm /mnt/btrfs/$BENCHMARK_FILE |
| 55 | # Unmount and remount to avoid any caching |
| 56 | sudo umount /mnt/btrfs |
| 57 | sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs |
| 58 | |
| 59 | echo "Approximate extracted compression ratio" |
| 60 | printf "%d / %d\n" \ |
| 61 | $(df /mnt/btrfs --output=used -B 1 | tail -n 1) \ |
| 62 | $(sudo du /mnt/btrfs -b -d 0 | tr '\t' '\n' | head -n 1); |
| 63 | |
| 64 | echo "Read" |
| 65 | time sudo tar -c /mnt/btrfs 2> /dev/null | wc -c > /dev/null |
| 66 | |
| 67 | sudo rm -rf /mnt/btrfs/* |
| 68 | sudo umount /mnt/btrfs |
| 69 | |
| 70 | # Run for each of -o compress-force={none, lzo, zlib, zstd} 5 times and take the |
| 71 | # min time and ratio. |
| 72 | |
| 73 | # none |
| 74 | # copy: 0.981 s |
| 75 | # extract: 5.501 s |
| 76 | # read: 8.807 s |
| 77 | # tarball ratio: 0.97 |
| 78 | # extracted ratio: 0.78 |
| 79 | |
| 80 | # lzo |
| 81 | # copy: 1.631 s |
| 82 | # extract: 8.458 s |
| 83 | # read: 8.585 s |
| 84 | # tarball ratio: 2.06 |
| 85 | # extracted ratio: 1.38 |
| 86 | |
| 87 | # zlib |
| 88 | # copy: 7.750 s |
| 89 | # extract: 21.544 s |
| 90 | # read: 11.744 s |
| 91 | # tarball ratio : 3.40 |
| 92 | # extracted ratio: 1.86 |
| 93 | |
| 94 | # zstd 1 |
| 95 | # copy: 2.579 s |
| 96 | # extract: 11.479 s |
| 97 | # read: 9.389 s |
| 98 | # tarball ratio : 3.57 |
| 99 | # extracted ratio: 1.85 |