[Flashbench] PQI 512MB compactflash

[Arnd Bergmann]

Disk /dev/sdc: 515 MB, 515579904 bytes
16 heads, 63 sectors/track, 999 cylinders, total 1006992 sectors
Units = sectors of 1 * 512 = 512 bytes

   Device Boot      Start         End      Blocks   Id  System 
/dev/sdc1   *          63     1005983      502960    6  FAT16

arnd at wuerfel:~/flashbench$ sudo ./flashbench -a /dev/sdc --blocksize=1024 --count=100
align 67108864  pre 827µs       on 990µs        post 786µs      diff 184µs
align 33554432  pre 811µs       on 992µs        post 812µs      diff 181µs
align 16777216  pre 798µs       on 992µs        post 814µs      diff 186µs
align 8388608   pre 809µs       on 994µs        post 805µs      diff 187µs
align 4194304   pre 812µs       on 995µs        post 827µs      diff 175µs
align 2097152   pre 803µs       on 986µs        post 813µs      diff 178µs
align 1048576   pre 805µs       on 849µs        post 798µs      diff 47.2µs
align 524288    pre 809µs       on 857µs        post 811µs      diff 47.5µs
align 262144    pre 808µs       on 861µs        post 814µs      diff 50.2µs
align 131072    pre 804µs       on 852µs        post 812µs      diff 44.1µs
align 65536     pre 805µs       on 854µs        post 814µs      diff 45µs
align 32768     pre 829µs       on 825µs        post 808µs      diff 5.79µs
align 16384     pre 802µs       on 810µs        post 818µs      diff 45ns
align 8192      pre 814µs       on 807µs        post 813µs      diff -6146ns
align 4096      pre 806µs       on 830µs        post 808µs      diff 22.6µs
align 2048      pre 803µs       on 806µs        post 807µs      diff 344ns


arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[2*1024*1024] /dev/sdc --blocksize=512
2MiB    4.12M/s 
1MiB    4.09M/s 
512KiB  4.09M/s 
256KiB  4.05M/s 
128KiB  4M/s    
64KiB   4M/s    
32KiB   3.33M/s 
16KiB   2.69M/s 
8KiB    2.2M/s  
4KiB    1.57M/s 
2KiB    946K/s  
1KiB    308K/s  
512B    132K/s  

arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[2*1024*1024] /dev/sdc --blocksize=8192 --random
2MiB    4.12M/s 
1MiB    4.12M/s 
512KiB  4.1M/s  
256KiB  4.07M/s 
128KiB  3.96M/s 
64KiB   3.93M/s 
32KiB   2.35M/s 
16KiB   1.31M/s 
8KiB    777K/s  

arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[2*1024*1024] /dev/sdc --blocksize=65536 --random --open-au-nr=4
2MiB    4.07M/s 
1MiB    4.14M/s 
512KiB  4.08M/s 
256KiB  4.05M/s 
128KiB  3.93M/s 
64KiB   3.87M/s 

arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[2*1024*1024] /dev/sdc --blocksize=65536 --random --open-au-nr=8
2MiB    4.08M/s 
1MiB    4.12M/s 
512KiB  4.05M/s 
256KiB  4.01M/s 
128KiB  3.85M/s 
64KiB   3.72M/s 

arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*512] /dev/sdc --blocksize=2048 --open-au-nr=8
512KiB  3.96M/s 
256KiB  4.02M/s 
128KiB  3.92M/s 
64KiB   3.77M/s 
32KiB   1.71M/s 
16KiB   846K/s  
8KiB    428K/s  

arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*256] /dev/sdc --blocksize=2048 --open-au-nr=5
256KiB  4.09M/s 
128KiB  3.82M/s 
64KiB   3.72M/s 
32KiB   3.65M/s 
16KiB   2.9M/s  
8KiB    2.1M/s  
4KiB    1.46M/s 
2KiB    869K/s  

arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*256] /dev/sdc --blocksize=2048 --open-au-nr=6
256KiB  4.08M/s 
128KiB  4.05M/s 
64KiB   4.02M/s 
32KiB   2.78M/s 
16KiB   1.57M/s 
8KiB    893K/s  
4KiB    501K/s  
2KiB    273K/s  

arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*256] /dev/sdc --blocksize=2048 --open-au-nr=4 --random
256KiB  4.07M/s 
128KiB  3.84M/s 
64KiB   3.8M/s  
32KiB   2.95M/s 
16KiB   2.17M/s 
8KiB    1.66M/s 
4KiB    1.16M/s 
2KiB    684K/s  

arnd at wuerfel:~/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*256] /dev/sdc --blocksize=2048 --open-au-nr=5 --random
256KiB  3.99M/s 
128KiB  3.82M/s 
64KiB   3.7M/s  
32KiB   2.85M/s 
16KiB   1.66M/s 
8KiB    745K/s  
4KiB    369K/s  
2KiB    200K/s  


arnd at wuerfel:~/flashbench$ sudo ./flashbench --erasesize=$[1024*256] /dev/sdc --blocksize=2048 --findfat --fat-nr=8 --random
256KiB  4.44M/s  4.01M/s  4.31M/s  4.04M/s  4.33M/s  4.02M/s  4.34M/s  3.52M/s  
128KiB  3.94M/s  3.91M/s  4.11M/s  3.95M/s  4.27M/s  3.96M/s  4.26M/s  3.39M/s  
64KiB   4.12M/s  3.99M/s  4.25M/s  3.93M/s  4.33M/s  4.03M/s  4.22M/s  3.38M/s  
32KiB   3.48M/s  3.51M/s  3.54M/s  2.56M/s  3.29M/s  2.03M/s  2.75M/s  2.32M/s  
16KiB   2.3M/s   2.19M/s  2.81M/s  1.9M/s   2.8M/s   1.57M/s  2.71M/s  1.31M/s  
8KiB    1.86M/s  1.19M/s  1.76M/s  1.23M/s  1.73M/s  1.14M/s  1.75M/s  1.24M/s  
4KiB    1.18M/s  879K/s   1.23M/s  1.06M/s  1.27M/s  1.07M/s  1.24M/s  1.05M/s  
2KiB    744K/s   708K/s   771K/s   778K/s   813K/s   743K/s   838K/s   767K/s