Refresh btrfs-benchmark.sh numbers

contrib/linux-kernel/btrfs-benchmark.sh

@@ -1,54 +1,55 @@
 # !/bin/sh
 set -e
 
-# Benchmarks run on a Ubuntu 14.04 VM with 2 cores and 4 GiB of RAM.
-# The VM is running on a Macbook Pro with a 3.1 GHz Intel Core i7 processor and
-# 16 GB of RAM and an SSD.
+# Benchmarks run on a Ubuntu 22.04 VM with 2 cores and 8 GiB of RAM.
+# The VM is c6i.xlarge instance with a Intel 8375C 2.90GHz processor and gp3 SSD with throughput 500 MB/s.
+# Hyperthreading disabled
+# Kernel: 6.2
 
 # silesia is a directory that can be downloaded from
 # http://mattmahoney.net/dc/silesia.html
-# ls -l silesia/
+# $ ls -lh ./silesia/
 # total 203M
-# -rwxr-xr-x 1 terrelln 9.8M Apr 12  2002 dickens
-# -rwxr-xr-x 1 terrelln  49M May 31  2002 mozilla
-# -rwxr-xr-x 1 terrelln 9.6M Mar 20  2003 mr
-# -rwxr-xr-x 1 terrelln  32M Apr  2  2002 nci
-# -rwxr-xr-x 1 terrelln 5.9M Jul  4  2002 ooffice
-# -rwxr-xr-x 1 terrelln 9.7M Apr 11  2002 osdb
-# -rwxr-xr-x 1 terrelln 6.4M Apr  2  2002 reymont
-# -rwxr-xr-x 1 terrelln  21M Mar 25  2002 samba
-# -rwxr-xr-x 1 terrelln 7.0M Mar 24  2002 sao
-# -rwxr-xr-x 1 terrelln  40M Mar 25  2002 webster
-# -rwxr-xr-x 1 terrelln 8.1M Apr  4  2002 x-ray
-# -rwxr-xr-x 1 terrelln 5.1M Nov 30  2000 xml
+# -rw-rw-r-- 1 ubuntu ubuntu 9.8M Apr 12  2002 dickens
+# -rw-rw-r-- 1 ubuntu ubuntu  49M May 31  2002 mozilla
+# -rw-rw-r-- 1 ubuntu ubuntu 9.6M Mar 20  2003 mr
+# -rw-rw-r-- 1 ubuntu ubuntu  32M Apr  2  2002 nci
+# -rw-rw-r-- 1 ubuntu ubuntu 5.9M Jul  4  2002 ooffice
+# -rw-rw-r-- 1 ubuntu ubuntu 9.7M Apr 11  2002 osdb
+# -rw-rw-r-- 1 ubuntu ubuntu 6.4M Apr  2  2002 reymont
+# -rw-rw-r-- 1 ubuntu ubuntu  21M Mar 25  2002 samba
+# -rw-rw-r-- 1 ubuntu ubuntu 7.0M Mar 24  2002 sao
+# -rw-rw-r-- 1 ubuntu ubuntu  40M Mar 25  2002 webster
+# -rw-rw-r-- 1 ubuntu ubuntu 8.1M Apr  4  2002 x-ray
+# -rw-rw-r-- 1 ubuntu ubuntu 5.1M Nov 30  2000 xml
 
 # $HOME is on a ext4 filesystem
 BENCHMARK_DIR="$HOME/silesia/"
 N=10
 
 # Normalize the environment
-sudo umount /mnt/btrfs 2> /dev/null > /dev/null || true
-sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs
+sudo umount /mnt/btrfs 2>/dev/null >/dev/null || true
+sudo mount -t btrfs $@ /dev/nvme1n1 /mnt/btrfs
 sudo rm -rf /mnt/btrfs/*
 sync
 sudo umount /mnt/btrfs
-sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs
+sudo mount -t btrfs $@ /dev/nvme1n1 /mnt/btrfs
 
 # Run the benchmark
 echo "Compression"
 time sh -c "for i in \$(seq $N); do sudo cp -r $BENCHMARK_DIR /mnt/btrfs/\$i; done; sync"
 
 echo "Approximate compression ratio"
-printf "%d / %d\n"                                                             \
-  $(df /mnt/btrfs --output=used -B 1 | tail -n 1)                              \
-  $(sudo du /mnt/btrfs -b -d 0 | tr '\t' '\n' | head -n 1);
+printf "print(1 / (%d / %d))\n" \
+  $(df /mnt/btrfs --output=used -B 1 | tail -n 1) \
+  $(sudo du /mnt/btrfs -b -d 0 | tr '\t' '\n' | head -n 1) | python3 -
 
 # Unmount and remount to avoid any caching
 sudo umount /mnt/btrfs
-sudo mount -t btrfs $@ /dev/sda3 /mnt/btrfs
+sudo mount -t btrfs $@ /dev/nvme1n1 /mnt/btrfs
 
 echo "Decompression"
-time sudo tar -c /mnt/btrfs 2> /dev/null | wc -c > /dev/null
+time sudo tar -c /mnt/btrfs 2>/dev/null | wc -c >/dev/null
 
 sudo rm -rf /mnt/btrfs/*
 sudo umount /mnt/btrfs
@@ -60,45 +61,45 @@ sudo umount /mnt/btrfs
 
 # none
 # compress: 4.205 s
-# decompress: 3.090 s
+# decompress: 3.808 s
 # ratio: 0.99
 
 # lzo
-# compress: 5.328 s
-# decompress: 4.793 s
-# ratio: 1.66
+# compress: 3.021 s
+# decompress: 8.162 s
+# ratio: 1.68
 
-# zlib
-# compress: 32.588 s
-# decompress: 8.791 s
-# ratio : 2.58
+# zlib 3
+# compress: 23.656 s
+# decompress: 17.454 s
+# ratio : 2.64
 
 # zstd 1
-# compress: 8.147 s
-# decompress: 5.527 s
-# ratio : 2.57
+# compress: 4.502 s
+# decompress: 9.569 s
+# ratio : 2.64
 
 # zstd 3
-# compress: 12.207 s
-# decompress: 5.195 s
-# ratio : 2.71
+# compress: 6.225 s
+# decompress: 9.576 s
+# ratio : 2.78
 
 # zstd 6
-# compress: 30.253 s
-# decompress: 5.324 s
-# ratio : 2.87
+# compress: 13.551 s
+# decompress: 9.632 s
+# ratio : 2.94
 
 # zstd 9
-# compress: 49.659 s
-# decompress: 5.220 s
-# ratio : 2.92
+# compress: 23.065 s
+# decompress: 10.379 s
+# ratio : 2.99
 
 # zstd 12
-# compress: 99.245 s
-# decompress: 5.193 s
-# ratio : 2.93
+# compress: 62.375 s
+# decompress: 11.503 s
+# ratio : 3.00
 
 # zstd 15
-# compress: 196.997 s
-# decompress: 5.992 s
-# ratio : 3.01
+# compress: 133.582 s
+# decompress: 12.124 s
+# ratio : 3.14