[Flashbench] Kingston class 4 microSDHC 4GB (authentic)

Arnd Bergmann arnd at arndb.de
Thu Apr 14 00:45:06 UTC 2011


==> /sys/block/mmcblk0/device/cid <==
02544d5341303447062263db5f00ac00

==> /sys/block/mmcblk0/device/csd <==
400e00325b5900001d6f7f800a400000

==> /sys/block/mmcblk0/device/date <==
12/2010

==> /sys/block/mmcblk0/device/driver <==
head: error reading `/sys/block/mmcblk0/device/driver': Is a directory

==> /sys/block/mmcblk0/device/erase_size <==
512

==> /sys/block/mmcblk0/device/fwrev <==
0x6

==> /sys/block/mmcblk0/device/hwrev <==
0x0

==> /sys/block/mmcblk0/device/manfid <==
0x000002

==> /sys/block/mmcblk0/device/name <==
SA04G

==> /sys/block/mmcblk0/device/oemid <==
0x544d

==> /sys/block/mmcblk0/device/power <==
head: error reading `/sys/block/mmcblk0/device/power': Is a directory

==> /sys/block/mmcblk0/device/preferred_erase_size <==
4194304

==> /sys/block/mmcblk0/device/scr <==
0235800001000000

==> /sys/block/mmcblk0/device/serial <==
0x2263db5f

==> /sys/block/mmcblk0/device/subsystem <==
head: error reading `/sys/block/mmcblk0/device/subsystem': Is a directory

==> /sys/block/mmcblk0/device/type <==
SD



Disk /dev/mmcblk0: 3951 MB, 3951034368 bytes
255 heads, 63 sectors/track, 480 cylinders, total 7716864 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

        Device Boot      Start         End      Blocks   Id  System
/dev/mmcblk0p1   *          63      240974      120456    c  W95 FAT32 (LBA)
/dev/mmcblk0p2          240975     7132859     3445942+  83  Linux


$ sudo ./flashbench -a /dev/mmcblk0 --blocksize 1024align 402653184 pre 1.51ms      on 2.84ms       post 1.66ms     diff 1.25ms
align 268435456 pre 1.49ms      on 2.86ms       post 1.66ms     diff 1.28ms
align 201326592 pre 1.51ms      on 2.85ms       post 1.66ms     diff 1.26ms
align 134217728 pre 1.53ms      on 2.88ms       post 1.68ms     diff 1.28ms
align 100663296 pre 1.52ms      on 2.87ms       post 1.67ms     diff 1.27ms
align 67108864  pre 1.52ms      on 2.86ms       post 1.66ms     diff 1.26ms
align 50331648  pre 1.53ms      on 2.85ms       post 1.66ms     diff 1.26ms
align 33554432  pre 1.52ms      on 2.85ms       post 1.66ms     diff 1.26ms
align 25165824  pre 1.52ms      on 2.85ms       post 1.66ms     diff 1.26ms
align 16777216  pre 1.51ms      on 2.84ms       post 1.66ms     diff 1.25ms
align 12582912  pre 1.51ms      on 2.84ms       post 1.66ms     diff 1.25ms
align 8388608   pre 1.42ms      on 2.75ms       post 1.66ms     diff 1.21ms
align 6291456   pre 1.54ms      on 1.56ms       post 1.55ms     diff 14.4µs
align 4194304   pre 1.41ms      on 2.63ms       post 1.54ms     diff 1.15ms
align 3145728   pre 1.55ms      on 2.66ms       post 1.55ms     diff 1.11ms
align 2097152   pre 1.54ms      on 1.56ms       post 1.55ms     diff 14.2µs
align 1572864   pre 1.54ms      on 2.65ms       post 1.54ms     diff 1.11ms
align 1048576   pre 1.54ms      on 1.56ms       post 1.54ms     diff 16.2µs
align 786432    pre 1.54ms      on 2.65ms       post 1.54ms     diff 1.11ms
align 524288    pre 1.54ms      on 1.56ms       post 1.54ms     diff 15.8µs
align 393216    pre 1.54ms      on 2.65ms       post 1.54ms     diff 1.11ms
align 262144    pre 1.54ms      on 1.56ms       post 1.54ms     diff 15.6µs
align 196608    pre 1.54ms      on 2.65ms       post 1.54ms     diff 1.11ms
align 131072    pre 1.54ms      on 1.56ms       post 1.54ms     diff 16.1µs
align 98304     pre 1.54ms      on 2.65ms       post 1.54ms     diff 1.11ms
align 65536     pre 1.54ms      on 1.56ms       post 1.54ms     diff 16.1µs
align 49152     pre 1.54ms      on 2.64ms       post 1.54ms     diff 1.1ms
align 32768     pre 1.54ms      on 1.55ms       post 1.54ms     diff 15.5µs
align 24576     pre 1.54ms      on 2.65ms       post 1.54ms     diff 1.11ms
align 16384     pre 1.54ms      on 1.56ms       post 1.54ms     diff 15.6µs
align 12288     pre 1.54ms      on 1.54ms       post 1.54ms     diff -649ns
align 8192      pre 1.54ms      on 1.56ms       post 1.54ms     diff 15.7µs
align 6144      pre 1.54ms      on 1.54ms       post 1.54ms     diff 660ns
align 4096      pre 1.54ms      on 1.54ms       post 1.54ms     diff 458ns
align 3072      pre 1.54ms      on 1.54ms       post 1.54ms     diff -132ns
align 2048      pre 1.54ms      on 1.54ms       post 1.54ms     diff -1008ns


$ sudo ./flashbench --open-au --open-au-nr=1 --erasesize=$[4*1024*1024] --blocksize=512 /dev/mmcblk0   --offset=$[32 * 1024 * 1024] 
4MiB    3.35M/s 
2MiB    2.56M/s 
1MiB    1.77M/s 
512KiB  1.76M/s 
256KiB  1.76M/s 
128KiB  2.54M/s 
64KiB   4.59M/s 
32KiB   4.46M/s 
16KiB   3.54M/s 
8KiB    2.93M/s 
4KiB    2.25M/s 
2KiB    22.1K/s 

arnd at klappe2:~/git/flashbench$ sudo ./flashbench --open-au --open-au-nr=2 --erasesize=$[4*1024*1024] --blocksize=512 /dev/mmcblk0   --offset=$[32 * 1024 * 1024] 
4MiB    4.17M/s 
2MiB    2.76M/s 
1MiB    1.38M/s 
512KiB  700K/s  
256KiB  355K/s  
^C
arnd at klappe2:~/git/flashbench$ sudo ./flashbench --open-au --open-au-nr=1 --erasesize=$[4*1024*1024] --blocksize=512 /dev/mmcblk0   --offset=$[32 * 1024 * 1024]  --random
4MiB    3.05M/s 
2MiB    1.18M/s 
1MiB    1.4M/s  
512KiB  556K/s  
256KiB  310K/s  
128KiB  141K/s  
^C




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