Flashbench-results

flashbench-results@lists.linaro.org

16 participants
1687 discussions

by Arnd Bergmann

==> /sys/block/mmcblk0/device/cid <== 1b534d3030303030102b38208800b700 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900003b577f800a400000 ==> /sys/block/mmcblk0/device/date <== 07/2011 ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/manfid <== 0x00001b ==> /sys/block/mmcblk0/device/name <== 00000 ==> /sys/block/mmcblk0/device/oemid <== 0x534d ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235800000000000 ==> /sys/block/mmcblk0/device/serial <== 0x2b382088 ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=00000 MODALIAS=mmc:block 179 8 7778304 mmcblk0 179 9 7774208 mmcblk0p1 $ sudo ./flashbench -a /dev/mmcblk0 --blocksize 1024 align 805306368 pre 799µs on 1.13ms post 754µs diff 349µs align 536870912 pre 901µs on 1.19ms post 817µs diff 332µs align 402653184 pre 816µs on 1.13ms post 771µs diff 341µs align 268435456 pre 901µs on 1.2ms post 830µs diff 332µs align 201326592 pre 786µs on 1.13ms post 749µs diff 359µs align 134217728 pre 887µs on 1.17ms post 820µs diff 317µs align 100663296 pre 804µs on 1.12ms post 755µs diff 344µs align 67108864 pre 908µs on 1.2ms post 840µs diff 330µs align 50331648 pre 805µs on 1.12ms post 757µs diff 341µs align 33554432 pre 847µs on 1.13ms post 797µs diff 311µs align 25165824 pre 774µs on 1.1ms post 753µs diff 338µs align 16777216 pre 756µs on 962µs post 744µs diff 212µs align 12582912 pre 715µs on 1.03ms post 752µs diff 297µs align 8388608 pre 746µs on 979µs post 746µs diff 232µs align 6291456 pre 714µs on 1.09ms post 779µs diff 342µs align 4194304 pre 758µs on 995µs post 783µs diff 224µs align 3145728 pre 672µs on 766µs post 767µs diff 46.3µs align 2097152 pre 731µs on 991µs post 769µs diff 241µs align 1572864 pre 672µs on 764µs post 761µs diff 48.2µs align 1048576 pre 672µs on 769µs post 775µs diff 45.2µs align 786432 pre 674µs on 766µs post 767µs diff 45.8µs align 524288 pre 660µs on 755µs post 771µs diff 39.5µs align 393216 pre 670µs on 767µs post 762µs diff 51.8µs align 262144 pre 667µs on 771µs post 778µs diff 48.7µs align 196608 pre 671µs on 768µs post 768µs diff 48.5µs align 131072 pre 659µs on 763µs post 771µs diff 47.8µs align 98304 pre 666µs on 765µs post 767µs diff 49µs align 65536 pre 658µs on 764µs post 776µs diff 47µs align 49152 pre 662µs on 760µs post 769µs diff 44.8µs align 32768 pre 670µs on 773µs post 769µs diff 53.5µs align 24576 pre 679µs on 761µs post 783µs diff 30µs align 16384 pre 680µs on 778µs post 781µs diff 47.5µs align 12288 pre 740µs on 732µs post 732µs diff -4351ns arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --findfat --fat-nr=5 --erasesize=$[8 * 1024 * 1024] 8MiB 4.55M/s 7.82M/s 7.76M/s 7.8M/s 7.81M/s 4MiB 7.79M/s 7.72M/s 7.68M/s 6.62M/s 7.79M/s 2MiB 7.75M/s 7.72M/s 7.71M/s 6.49M/s 7.71M/s 1MiB 7.77M/s 7.76M/s 7.7M/s 6.41M/s 7.75M/s 512KiB 7.8M/s 7.78M/s 7.76M/s 6.55M/s 7.8M/s 256KiB 7.7M/s 7.79M/s 7.76M/s 6.48M/s 7.7M/s 128KiB 7.75M/s 7.72M/s 7.71M/s 6.49M/s 7.56M/s 64KiB 7.75M/s 7.73M/s 7.7M/s 6.48M/s 7.74M/s 32KiB 5.79M/s 5.82M/s 5.79M/s 5.07M/s 5.79M/s 16KiB 3.72M/s 2.09M/s 2.67M/s 2.51M/s 1.62M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --findfat --fat-nr=4 --erasesize=$[4 * 1024 * 1024] --blocksize=1024 4MiB 7.76M/s 7.66M/s 7.65M/s 7.78M/s 2MiB 3.05M/s 5.53M/s 7.65M/s 7.77M/s 1MiB 2.36M/s 5.54M/s 7.68M/s 7.79M/s 512KiB 2.37M/s 5.53M/s 7.42M/s 7.78M/s 256KiB 3.58M/s 5.55M/s 7.67M/s 7.78M/s 128KiB 3.62M/s 5.54M/s 7.63M/s 7.76M/s 64KiB 7.74M/s 5.56M/s 7.66M/s 7.78M/s 32KiB 5.83M/s 4.48M/s 5.76M/s 5.84M/s 16KiB 3.68M/s 3.16M/s 2.11M/s 2.11M/s 8KiB 1.93M/s 1.08M/s 1.89M/s 1.36M/s 4KiB 814K/s 761K/s 927K/s 794K/s 2KiB 362K/s 442K/s 427K/s 402K/s 1KiB 217K/s 215K/s 224K/s 216K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=4 --erasesize=$[8 * 1024 * 1024] --random 8MiB 5.55M/s 4MiB 4.48M/s 2MiB 3.02M/s 1MiB 1.64M/s 512KiB 829K/s 512KiB 463K/s 256KiB 203K/s 128KiB 179K/s 64KiB 212K/s 32KiB 167K/s 16KiB 3.77M/s $ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=1 --erasesize=$[8 1024] --blocksize 512 8MiB 5.6M/s 4MiB 2.12M/s 2MiB 3.99M/s 1MiB 2.52M/s 512KiB 2.5M/s 256KiB 3.96M/s 128KiB 3.99M/s 64KiB 5.62M/s 32KiB 4.54M/s 16KiB 3.74M/s 8KiB 1.68M/s 4KiB 757K/s 2KiB 407K/s $ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=1 --erasesize=$[6 * 1024 * 1024] --blocksize 1536 6MiB 7.63M/s 3MiB 4.45M/s 1.5MiB 4.43M/s 768KiB 2.38M/s 384KiB 2.39M/s 192KiB 3.11M/s 96KiB 4.05M/s 48KiB 6.16M/s 24KiB 4.11M/s 12KiB 1.86M/s 6KiB 1.14M/s 3KiB 527K/s 1.5KiB 314K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=1 --erasesize=$[6 * 1024 * 1024] --blocksize 1536 --offset=$[64 * 1024 * 576] 6MiB 7.79M/s 3MiB 2.37M/s 1.5MiB 2.36M/s 768KiB 2.38M/s 384KiB 2.39M/s 192KiB 3.1M/s 96KiB 4.03M/s 48KiB 6.15M/s 24KiB 4.12M/s 12KiB 1.86M/s 6KiB 1.12M/s 3KiB 526K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=1 --erasesize=$[6 * 1024 1024] --blocksize 1536 --offset=$[64 * 1024 * 576] --random 6MiB 7.45M/s 3MiB 1.77M/s 1.5MiB 1.69M/s 768KiB 599K/s 384KiB 340K/s 192KiB 171K/s 96KiB 199K/s 48KiB 174K/s 24KiB 193K/s 12KiB 1.55M/s 6KiB 1.06M/s 3KiB 543K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=3 --erasesize=$[6 * 1024 * 1024] --blocksize 1536 --offset=$[64 * 1024 * 576] [sudo] password for arnd: 6MiB 7.39M/s 3MiB 4.44M/s 1.5MiB 2.96M/s 768KiB 2.31M/s 384KiB 1.61M/s 192KiB 1.53M/s 96KiB 1.13M/s 48KiB 1.14M/s 24KiB 1.11M/s 12KiB 1.25M/s 6KiB 921K/s ^rnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=6 --erasesize=$[6 * 1024 * 1024] --blocksize 1536 --offset=$[64 * 1024 * 576] 6MiB 7.22M/s 3MiB 4.82M/s 1.5MiB 2.6M/s 768KiB 1.24M/s 384KiB 633K/s 192KiB 321K/s 96KiB 162K/s ^rnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=4 --erasesize=$[6 * 1024 * 1024] --blocksize 1536 --offset=$[64 * 1024 * 576] 6MiB 5.07M/s 3MiB 5.05M/s 1.5MiB 2.73M/s 768KiB 1.25M/s 384KiB 640K/s ^rnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=2 --erasesize=$[6 * 1024 * 1024] --blocksize 1536 --offset=$[64 * 1024 * 576] 6MiB 4.56M/s 3MiB 5.91M/s 1.5MiB 7.9M/s 768KiB 7.93M/s 384KiB 7.9M/s 192KiB 7.88M/s 96KiB 6.72M/s 48KiB 6.25M/s 24KiB 4.21M/s 12KiB 1.65M/s 6KiB 942K/s 3KiB 570K/s 1.5KiB 297K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=2 --erasesize=$[6 * 1024 * 1024] --blocksize 1536 --offset=$[64 * 1024 * 576] --random 6MiB 7.73M/s 3MiB 5.75M/s 1.5MiB 5.06M/s 768KiB 1.99M/s 384KiB 1.12M/s 192KiB 512K/s ^rnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=2 --erasesize=$[3 * 1024 * 1024] --blocksize 1536 --offset=$[64 * 1024 * 576] 3MiB 4.53M/s 1.5MiB 3.56M/s 768KiB 4.5M/s 384KiB 4.49M/s 192KiB 4.49M/s 96KiB 4.09M/s 48KiB 3.9M/s 24KiB 2.97M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=3 --erasesize=$[3 * 1024 * 1024] --blocksize 1536 --offset=$[64 * 1024 * 576] 3MiB 5.02M/s 1.5MiB 2.92M/s 768KiB 2.11M/s 384KiB 1.45M/s 192KiB 1.33M/s 96KiB 1.06M/s 48KiB 1.04M/s 24KiB 1.05M/s 12KiB 1.38M/s 6KiB 910K/s After removing the card, it was broken and could no longer be read...

14 years, 6 months

Merry Christmas G&K.Ing

by Cngking

To ensure delivery of these Emails to your inbox, please add sales(a)gk-ing.com to your email address book. Dear Friend: Thank for you support in the past 2011,Coming Christmas and New year day.G&K.ing wish you Merry Christmas! Happy New Year!! Quality,Service,Long Term Cooperation---Our Unremitting Pursuit!!! Sincerely/Gwen G&K.Ing,We make miracle. Add:Rm 703.King Lihua Commercial Building,NO.1133 Yiyuan Road,Bao"an,Shenzhen,China Tel: 86(0)755 2220 8877 Fax:86(0)755 2214 1877 Website : www.gk-ing.com If you don't want to receive these Emails, please click unsubscribe.

14 years, 8 months

Merry Christmas&Happy New Year

by 1impress Fungchoi Group (Pte) Lt

14 years, 8 months

Kingston CF 2GB

by Philippe De Muyter

Hello Arnd, Here are the results for the Kingston CF 2GB (Assy in TAIWAN). The one marked with (Assy in Japan) have another size, and probabbly other characteristics. Could the size be related to the number of open-au's ? Philippe tmp179:~ # cat /proc/partitions major minor #blocks name 8 0 244198584 sda 8 1 2103296 sda1 8 2 20972544 sda2 8 16 1982232 sdb 8 17 1975963 sdb1 tmp179:~ # ./flashbench -a -b 1024 /dev/sdb sched_setscheduler: Operation not permitted align 67108864 pre 343µs on 370µs post 321µs diff 37.5µs align 33554432 pre 342µs on 367µs post 319µs diff 36.5µs align 16777216 pre 342µs on 368µs post 320µs diff 36.5µs align 8388608 pre 343µs on 368µs post 318µs diff 37.1µs align 4194304 pre 342µs on 368µs post 319µs diff 37.1µs align 2097152 pre 343µs on 368µs post 319µs diff 37µs align 1048576 pre 344µs on 370µs post 320µs diff 38.3µs align 524288 pre 322µs on 350µs post 344µs diff 17.1µs align 262144 pre 320µs on 349µs post 344µs diff 16.8µs align 131072 pre 321µs on 349µs post 344µs diff 16.9µs align 65536 pre 321µs on 350µs post 344µs diff 17.2µs align 32768 pre 323µs on 351µs post 344µs diff 18µs align 16384 pre 320µs on 326µs post 321µs diff 5.4µs align 8192 pre 321µs on 325µs post 320µs diff 5µs align 4096 pre 320µs on 326µs post 321µs diff 5.6µs align 2048 pre 320µs on 325µs post 321µs diff 4.85µs tmp179:~ # hdparm -i /dev/sdb /dev/sdb: Model=CF CARD 2GB, FwRev=20071116, SerialNo=CF 2GB 20051F71 Config={ HardSect NotMFM Fixed DTR>10Mbs } RawCHS=3933/16/63, TrkSize=0, SectSize=576, ECCbytes=4 BuffType=DualPort, BuffSize=1kB, MaxMultSect=1, MultSect=off CurCHS=3933/16/63, CurSects=3964464, LBA=yes, LBAsects=3964464 IORDY=no, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: *mdma0 mdma1 mdma2 AdvancedPM=no * signifies the current active mode tmp179:~ # for i in `seq 1 10`; do echo $i; ./flashbench --open-au --open-au-nr=$i --erasesize=$[1024 * 1024] --blocksize=16384 /dev/sdb; done 1 sched_setscheduler: Operation not permitted 1MiB 11M/s 512KiB 11.1M/s 256KiB 11M/s 128KiB 11M/s 64KiB 10.7M/s 32KiB 10M/s 16KiB 8.83M/s 2 sched_setscheduler: Operation not permitted 1MiB 11.1M/s 512KiB 11.1M/s 256KiB 11.1M/s 128KiB 11.1M/s 64KiB 10.7M/s 32KiB 10.1M/s 16KiB 8.87M/s 3 sched_setscheduler: Operation not permitted 1MiB 11.1M/s 512KiB 11.1M/s 256KiB 11.1M/s 128KiB 11.1M/s 64KiB 10.8M/s 32KiB 10.1M/s 16KiB 8.85M/s 4 sched_setscheduler: Operation not permitted 1MiB 11.1M/s 512KiB 8.32M/s 256KiB 4.56M/s 128KiB 2.39M/s ^C tmp179:~ # for i in `seq 1 10`; do echo $i; ./flashbench --open-au --open-au-nr=$i --erasesize=$[1024 * 1024] --blocksize=16384 /dev/sdb --random; done 1 sched_setscheduler: Operation not permitted 1MiB 11.1M/s 512KiB 11.1M/s 256KiB 7.38M/s 128KiB 6.18M/s 64KiB 6.12M/s 32KiB 6.47M/s 16KiB 7.04M/s 2 sched_setscheduler: Operation not permitted 1MiB 7.37M/s 512KiB 8.05M/s 256KiB 6.72M/s 128KiB 6.4M/s 64KiB 6.53M/s 32KiB 6.55M/s 16KiB 7.04M/s 3 sched_setscheduler: Operation not permitted 1MiB 8.66M/s 512KiB 9.11M/s 256KiB 6.79M/s 128KiB 5.55M/s 64KiB 4.24M/s 32KiB 4.05M/s 16KiB 3.92M/s 4 sched_setscheduler: Operation not permitted 1MiB 9.37M/s 512KiB 9.67M/s 256KiB 6.73M/s 128KiB 4.79M/s 64KiB 3.32M/s 32KiB 3.07M/s 16KiB 3.52M/s 5 sched_setscheduler: Operation not permitted 1MiB 9.8M/s 512KiB 7.8M/s 256KiB 4.75M/s 128KiB 4.21M/s 64KiB 2.99M/s 32KiB 2.46M/s 16KiB 2.75M/s 6 sched_setscheduler: Operation not permitted 1MiB 11.4M/s 512KiB 7.1M/s 256KiB 4.03M/s 128KiB 2.7M/s 64KiB 2.83M/s 32KiB 2.38M/s 16KiB 2.45M/s 7 sched_setscheduler: Operation not permitted 1MiB 11.4M/s 512KiB 6.71M/s 256KiB 3.73M/s 128KiB 2.43M/s 64KiB 2.49M/s 32KiB 2.07M/s 16KiB 2.11M/s 8 sched_setscheduler: Operation not permitted 1MiB 11.4M/s 512KiB 6.4M/s 256KiB 3.5M/s 128KiB 2.26M/s 64KiB 2.23M/s 32KiB 1.85M/s 16KiB 1.86M/s 9 sched_setscheduler: Operation not permitted 1MiB 11.4M/s 512KiB 6.18M/s 256KiB 3.33M/s 128KiB 2.1M/s 64KiB 2.04M/s 32KiB 1.65M/s 16KiB 1.66M/s 10 sched_setscheduler: Operation not permitted 1MiB 11.4M/s 512KiB 6M/s 256KiB 3.18M/s 128KiB 1.99M/s 64KiB 1.88M/s 32KiB 1.52M/s 16KiB 1.51M/s (reverse-i-search)`fat': ./flashbench --findfat --^Ct-nr=10 --erasesize=$[2 * 1024 * 1024] --blocksize=1024 /dev/sdb tmp179:~ # ./flashbench --findfat --fat-nr=10 --erasesize=$[1024 * 1024] --blocksize=1024 /dev/sdb sched_setscheduler: Operation not permitted 1MiB 4.32M/s 11.4M/s 11.4M/s 11.4M/s 11.4M/s 11.2M/s 11.3M/s 11.4M/s 11.3M/s 11.4M/s 512KiB 11.3M/s 11.4M/s 11.1M/s 11.4M/s 11.4M/s 11.4M/s 11.4M/s 11.4M/s 11M/s 11.4M/s 256KiB 11.4M/s 11.4M/s 11.2M/s 11.2M/s 11.2M/s 11.2M/s 11.3M/s 11.4M/s 11.4M/s 11.3M/s 128KiB 11.3M/s 11.3M/s 11.2M/s 11.4M/s 11.4M/s 11.4M/s 11.4M/s 11.2M/s 11.3M/s 11.4M/s 64KiB 11M/s 11M/s 11M/s 11M/s 10.8M/s 11M/s 11M/s 11M/s 11M/s 11M/s 32KiB 9.98M/s 10.3M/s 10.3M/s 10.3M/s 10.2M/s 10.1M/s 10.2M/s 10.2M/s 10.2M/s 10.3M/s 16KiB 8.99M/s 9.01M/s 9.01M/s 8.99M/s 8.94M/s 9.02M/s 9.03M/s 9.03M/s 9.01M/s 8.95M/s 8KiB 7.2M/s 7.23M/s 7.23M/s 7.22M/s 7.21M/s 7.23M/s 7.13M/s 7.23M/s 7.23M/s 7.22M/s 4KiB 4.98M/s 4.97M/s 4.83M/s 4.97M/s 4.97M/s 4.97M/s 4.92M/s 4.91M/s 4.93M/s 4.93M/s 2KiB 3.04M/s 3.06M/s 3.05M/s 3.06M/s 3.05M/s 3.06M/s 3.03M/s 3.06M/s 3.06M/s 3.06M/s 1KiB 1.26M/s 1.26M/s 1.26M/s 1.26M/s 1.25M/s 1.26M/s 1.26M/s 1.24M/s 1.26M/s 1.25M/s tmp179:~ # ./flashbench --findfat --fat-nr=10 --erasesize=$[1024 * 1024] --blocksize=1024 /dev/sdb sched_setscheduler: Operation not permitted 1MiB 11.2M/s 11.4M/s 11.4M/s 11.3M/s 11.4M/s 11.4M/s 11.4M/s 11.3M/s 11.4M/s 11.4M/s 512KiB 11.4M/s 11.2M/s 11.4M/s 11.4M/s 11.4M/s 11.4M/s 11.4M/s 11.4M/s 11.2M/s 11.3M/s 256KiB 11M/s 11.4M/s 11.4M/s 11.3M/s 11.4M/s 11.3M/s 11.1M/s 11.4M/s 11.4M/s 11M/s 128KiB 11.4M/s 11.2M/s 11.3M/s 11.4M/s 11.4M/s 11.3M/s 11.4M/s 11.3M/s 11.4M/s 11.3M/s 64KiB 11M/s 11M/s 11M/s 10.9M/s 11M/s 11M/s 11M/s 11M/s 11M/s 11M/s 32KiB 10.1M/s 10.2M/s 10M/s 10.4M/s 10.3M/s 10.3M/s 10.3M/s 10.3M/s 10.1M/s 10.3M/s 16KiB 9.03M/s 8.82M/s 9.02M/s 8.93M/s 8.94M/s 9.01M/s 9.03M/s 9M/s 9.02M/s 9.01M/s 8KiB 7.24M/s 7.22M/s 7.23M/s 7.21M/s 7.22M/s 7.17M/s 7.24M/s 7.23M/s 7.22M/s 7.23M/s 4KiB 4.97M/s 4.98M/s 4.92M/s 4.93M/s 4.84M/s 4.99M/s 4.97M/s 4.96M/s 4.97M/s 4.96M/s 2KiB 3.01M/s 3.06M/s 3.06M/s 2.97M/s 3.05M/s 3.03M/s 3.03M/s 3.05M/s 3.06M/s 3.05M/s 1KiB 1.26M/s 1.26M/s 1.26M/s 1.26M/s 1.26M/s 1.26M/s 1.26M/s 1.25M/s 1.24M/s 1.26M/s tmp179:~ # -- Philippe De Muyter +32 2 6101532 Macq SA rue de l'Aeronef 2 B-1140 Bruxelles

14 years, 8 months

SanDisk SDSDQY-008G-A11A Mobile Ultra 8GB microSD card

by Andrew Bradford

Just received a new SanDisk Mobile Ultra 8GB microSD card. Tests done on my HP Elitebook 8560w with Debian 6 and 2.6.38 kernel. Card is direct out of the packaging and into tests. It looks like 4MB erase blocks and either 8kB or 32kB pages, but I'm not really sure. Tests done with 8kB blocksize. 6 connections work well, 7 and 8 fall off quickly in performance. If there's any other info needed, please let me know. -Andrew andrew@bradford:~/flashbench$ sudo head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 035344535530384780716a01f200bb00 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900003b377f800a404000 ==> /sys/block/mmcblk0/device/date <== 11/2011 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x8 ==> /sys/block/mmcblk0/device/manfid <== 0x000003 ==> /sys/block/mmcblk0/device/name <== SU08G ==> /sys/block/mmcblk0/device/oemid <== 0x5344 ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235800300000000 ==> /sys/block/mmcblk0/device/serial <== 0x716a01f2 ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SU08G MODALIAS=mmc:block andrew@bradford:~/flashbench$ sudo fdisk -l /dev/mmcblk0 Disk /dev/mmcblk0: 7948 MB, 7948206080 bytes 81 heads, 10 sectors/track, 19165 cylinders Units = cylinders of 810 * 512 = 414720 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 11 19166 7757824 b W95 FAT32 andrew@bradford:~/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 align 2147483648 pre 508µs on 575µs post 467µs diff 87.3µs align 1073741824 pre 518µs on 601µs post 469µs diff 107µs align 536870912 pre 526µs on 600µs post 469µs diff 103µs align 268435456 pre 509µs on 598µs post 468µs diff 110µs align 134217728 pre 526µs on 599µs post 469µs diff 102µs align 67108864 pre 519µs on 597µs post 467µs diff 104µs align 33554432 pre 515µs on 598µs post 468µs diff 106µs align 16777216 pre 510µs on 594µs post 466µs diff 106µs align 8388608 pre 508µs on 584µs post 465µs diff 97.4µs align 4194304 pre 492µs on 593µs post 480µs diff 107µs align 2097152 pre 480µs on 478µs post 468µs diff 4.16µs align 1048576 pre 482µs on 481µs post 470µs diff 5.2µs align 524288 pre 482µs on 482µs post 467µs diff 7.22µs align 262144 pre 480µs on 479µs post 469µs diff 4.83µs align 131072 pre 480µs on 480µs post 467µs diff 7.06µs align 65536 pre 480µs on 480µs post 470µs diff 4.72µs align 32768 pre 479µs on 480µs post 464µs diff 8.17µs align 16384 pre 481µs on 478µs post 470µs diff 3.09µs align 8192 pre 468µs on 471µs post 470µs diff 1.54µs align 4096 pre 481µs on 464µs post 467µs diff -9689ns align 2048 pre 451µs on 456µs post 456µs diff 2.33µs andrew@bradford:~/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4 * 1024 * 1024] --blocksize=$[8 * 1024] --open-au-nr=1 4MiB 10.7M/s 2MiB 10.7M/s 1MiB 10.7M/s 512KiB 10.7M/s 256KiB 10.6M/s 128KiB 10.6M/s 64KiB 10.6M/s 32KiB 9.53M/s 16KiB 8.09M/s 8KiB 5.99M/s andrew@bradford:~/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4 * 1024 * 1024] --blocksize=$[8 * 1024] --open-au-nr=6 4MiB 10.6M/s 2MiB 10.7M/s 1MiB 10.6M/s 512KiB 10.6M/s 256KiB 10.6M/s 128KiB 10.4M/s 64KiB 10.3M/s 32KiB 9.04M/s 16KiB 7.36M/s 8KiB 5.19M/s andrew@bradford:~/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4 * 1024 * 1024] --blocksize=$[8 * 1024] --open-au-nr=7 4MiB 6.55M/s 2MiB 7.04M/s 1MiB 5.81M/s 512KiB 5.77M/s 256KiB 5.65M/s 128KiB 5.57M/s 64KiB 6.52M/s 32KiB 7.24M/s 16KiB 6.29M/s 8KiB 4.69M/s andrew@bradford:~/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4 * 1024 * 1024] --blocksize=$[8 * 1024] --open-au-nr=8 4MiB 7.08M/s 2MiB 5.53M/s 1MiB 3.9M/s 512KiB 4.7M/s 256KiB 4.05M/s 128KiB 4.54M/s 64KiB 5.84M/s 32KiB 6.28M/s 16KiB 5.66M/s 8KiB 614K/s ndrew@bradford:~/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4 * 1024 * 1024] --blocksize=$[8 * 1024] --open-au-nr=2 --random 4MiB 10.4M/s 2MiB 10.6M/s 1MiB 10.6M/s 512KiB 10.5M/s 256KiB 8.4M/s 128KiB 4.36M/s 64KiB 2.39M/s 32KiB 1.23M/s 16KiB 604K/s 8KiB 2.23M/s andrew@bradford:~/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4 * 1024 * 1024] --blocksize=$[8 * 1024] --open-au-nr=6 --random 4MiB 8.06M/s 2MiB 6.91M/s 1MiB 10.6M/s 512KiB 10.6M/s 256KiB 8.44M/s 128KiB 4.37M/s 64KiB 2.4M/s 32KiB 1.23M/s 16KiB 606K/s 8KiB 1.9M/s andrew@bradford:~/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4 * 1024 * 1024] --blocksize=$[8 * 1024] --open-au-nr=7 --random 4MiB 6.65M/s 2MiB 6.52M/s 1MiB 5.75M/s 512KiB 4.01M/s 256KiB 2.93M/s 128KiB 1.73M/s 64KiB 952K/s 32KiB 533K/s 16KiB 365K/s 8KiB 1.35M/s

14 years, 8 months

PNY 4GB microSD Class 4 C04G Taiwan manfid 0x000002 oemid 0x544d

by Andrew Bradford

If I'm reading my results correctly, this card is 2MB erase blocks and 8KB pages and it can only have 1 open segment at a time? It's not that fast of a card, I have another one with ext3 running on a PandaBoard with Emdebian Squeeze. As this is my first usage of flashbench, if there's any other info that would be useful, please let me know. This card was brand new before testing. Thanks, Andrew andrew@bradford:~/flashbench$ sudo head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 02544d534430344760b099f09300b400 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900001d877f800a400000 ==> /sys/block/mmcblk0/device/date <== 04/2011 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x6 ==> /sys/block/mmcblk0/device/manfid <== 0x000002 ==> /sys/block/mmcblk0/device/name <== SD04G ==> /sys/block/mmcblk0/device/oemid <== 0x544d ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 02b5800026025202 ==> /sys/block/mmcblk0/device/serial <== 0xb099f093 ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SD04G MODALIAS=mmc:block andrew@bradford:~/flashbench$ sudo fdisk -l /dev/mmcblk0 Disk /dev/mmcblk0: 3963 MB, 3963617280 bytes 128 heads, 63 sectors/track, 960 cylinders Units = cylinders of 8064 * 512 = 4128768 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 2 960 3866624 b W95 FAT32 andrew@bradford:~/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 align 1073741824 pre 896µs on 1.05ms post 753µs diff 225µs align 536870912 pre 959µs on 1.09ms post 731µs diff 241µs align 268435456 pre 744µs on 867µs post 731µs diff 129µs align 134217728 pre 744µs on 862µs post 731µs diff 125µs align 67108864 pre 741µs on 878µs post 745µs diff 135µs align 33554432 pre 742µs on 878µs post 746µs diff 134µs align 16777216 pre 742µs on 874µs post 747µs diff 130µs align 8388608 pre 739µs on 889µs post 754µs diff 143µs align 4194304 pre 754µs on 894µs post 749µs diff 142µs align 2097152 pre 764µs on 899µs post 752µs diff 141µs align 1048576 pre 761µs on 791µs post 762µs diff 29.1µs ## align 524288 pre 751µs on 793µs post 760µs diff 37.7µs align 262144 pre 758µs on 788µs post 763µs diff 27.9µs align 131072 pre 761µs on 799µs post 772µs diff 32.5µs align 65536 pre 761µs on 792µs post 770µs diff 26.6µs align 32768 pre 761µs on 789µs post 762µs diff 27.7µs align 16384 pre 762µs on 789µs post 762µs diff 26.8µs align 8192 pre 762µs on 787µs post 760µs diff 26µs align 4096 pre 760µs on 761µs post 761µs diff 318ns ## align 2048 pre 757µs on 757µs post 757µs diff 104ns andrew@bradford:~/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[2 * 1024 * 1024] --blocksize=$[8 * 1024] --open-au-nr=1 2MiB 8.46M/s 1MiB 8.28M/s 512KiB 8.42M/s 256KiB 8.11M/s 128KiB 8.42M/s 64KiB 8.15M/s 32KiB 7.71M/s 16KiB 5.47M/s 8KiB 3.32M/s andrew@bradford:~/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[2 * 1024 * 1024] --blocksize=$[8 * 1024] --open-au-nr=2 2MiB 5.82M/s 1MiB 4.82M/s 512KiB 2.23M/s 256KiB 1.09M/s 128KiB 545K/s 64KiB 273K/s 32KiB 136K/s 16KiB 68.2K/s 8KiB 622K/s

14 years, 9 months

IMPRESS your customer with our INNOVATED USB NOW!

by 1impress Fungchoi Group

Dear Sir/Madam,I hope this email finds you well. Please allow me to introduce you about our company and our coorperate gifts - USB flash drives. Established in 1988, with almost 22 years of experience, 1impress is an award-winning corporate gift company that has the expertise, equipment and technology to provide a full suite of recuit item printing service. We have printing facility in Singapore, China and Malaysia. Our corporate profile is attached for your kind consideration or you can download it from http://www.1impress.com/pdf/1impress-Corp-Corporate-Profile.pdf. We provide services such as customize of corporate gift, printing and packaging and many other services that you will be able to find on our website www.1impress.com. At 1impress, we produce innovative and sleek USB Flash Drives. We would like to invite you to come and enjoy our USB Flash Drivers promotion, where you can find saving on some of our great offers for all your corporate needs. We are able to cater to short schedules and produce high quality jobs of varying scale and volumes.You can search on our website: http://www.1impress.com/thumb-drive.php for your favorite choice. Or click the picture below to view our newest eletronic product.Our track record of uncompromising quality, value and timely results has earned us the trust and confidence of leading players in the global media industry, including publishers, advertising agencies, commercial designers and MNCs across Singapore, Australia, New Zealand, Europe and the US. We are confident that we will be able to meet your company’s coorperate gifts needs and I am willing to meet you to further understand your requirements. Please call me at +65-65 9017 2000 or email me to make a appointment. Thank you for your attention, time and patience. Kindly give us an opportunity to quote for your next project and looking forward to serve you. ------------------------------------Yours Sincerely,Ivy TeoBusiness Development Executive1impress Fungchoi Group (Pte) Limited - Your Printing, Our Passion.Singapore Office:998 Toa Payoh North Industrial Estate, #02-05, Singapore 318993HP: +65 9017 2000|| Toll Free: 1800-4677377 || Office: +65 677 77377 || Fax: +65 6358 1059 || E: ivy_t(a)1impress.comwww.1impress.com

14 years, 9 months

(fake) Sandisk

by Arnd Bergmann

arnd@klappe2:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0 Disk /dev/mmcblk0: 2002 MB, 2002780160 bytes # 1,955,840 KB ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 1b534d3030303030102a24f3f600b200 ==> /sys/block/mmcblk0/device/csd <== 007fff325b5a83baf6dbdfff0e800000 ==> /sys/block/mmcblk0/device/date <== 02/2011 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/manfid <== 0x00001b ==> /sys/block/mmcblk0/device/name <== 00000 ==> /sys/block/mmcblk0/device/oemid <== 0x534d # "SM" ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0225800000000000 ==> /sys/block/mmcblk0/device/serial <== 0x2a24f3f6 ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=00000 MODALIAS=mmc:block # 1MB erase block!: align 6291456 pre 1.52ms on 3.95ms post 3.21ms diff 1.59ms align 4194304 pre 1.57ms on 4.01ms post 3.21ms diff 1.62ms align 3145728 pre 1.54ms on 3.82ms post 3.05ms diff 1.53ms align 2097152 pre 1.56ms on 3.83ms post 3.03ms diff 1.53ms align 1572864 pre 2.3ms on 2.69ms post 2.59ms diff 247µs align 1048576 pre 1.64ms on 4.12ms post 3.25ms diff 1.67ms align 786432 pre 2.05ms on 2.48ms post 2.34ms diff 283µs align 524288 pre 2.34ms on 2.77ms post 2.61ms diff 298µs align 393216 pre 2.54ms on 2.97ms post 2.79ms diff 306µs align 262144 pre 2.66ms on 3.09ms post 2.96ms diff 274µs arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=2 --erasesize=$[4096 * 1024] --blocksize=4096 4MiB 4.78M/s 2MiB 6.4M/s 1MiB 6.45M/s 512KiB 6.32M/s 256KiB 6.47M/s 128KiB 6.43M/s 64KiB 6.31M/s 32KiB 5.34M/s 16KiB 3.96M/s 8KiB 1.09M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=2 --erasesize=$[4096 * 1024] --offset=$[2048*1024] --blocksize=4096 4MiB 4.88M/s 2MiB 6.43M/s 1MiB 6.35M/s 512KiB 6.33M/s 256KiB 6.44M/s 128KiB 6.4M/s 64KiB 5.25M/s 32KiB 5.33M/s 16KiB 3.91M/s 8KiB 2.32M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=2 --erasesize=$[4096 * 1024] --offset=$[33*512*1024] --blocksize=4096 4MiB 3.89M/s 2MiB 3.66M/s 1MiB 2.35M/s 512KiB 5M/s 256KiB 4M/s 128KiB 4.64M/s ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=1 --erasesize=$[1024 * 1024] --blocksize=4096 1MiB 5.39M/s 512KiB 1.6M/s 256KiB 1.52M/s 128KiB 2.28M/s 64KiB 6.41M/s 32KiB 5.27M/s 16KiB 3.99M/s 8KiB 2.88M/s 4KiB 527K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=2 --erasesize=$[4*1024 * 1024] --offset=$[34*512*1024] --blocksize=4096 4MiB 4.58M/s 2MiB 6.38M/s 1MiB 6.47M/s 512KiB 4.6M/s 256KiB 6.47M/s 128KiB 6.49M/s 64KiB 5.16M/s 32KiB 5.35M/s 16KiB 4.01M/s 8KiB 2.59M/s ^C # no random write: arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=1 --erasesize=$[4*1024 * 1024] --offset=$[32*512*1024] --blocksize=4096 --random 4MiB 3M/s 2MiB 2.51M/s 1MiB 2.55M/s 512KiB 1.09M/s 256KiB 727K/s 128KiB 357K/s 64KiB 309K/s ^C

14 years, 10 months

Kingston 2GB microSD

by Arnd Bergmann

==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 02544d53413032470520cddb0600a900 ==> /sys/block/mmcblk0/device/csd <== 002e00325b5aa3acffffff800a800000 ==> /sys/block/mmcblk0/device/date <== 09/2010 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x5 ==> /sys/block/mmcblk0/device/hwrev <== 0x0 ==> /sys/block/mmcblk0/device/manfid <== 0x000002 ==> /sys/block/mmcblk0/device/name <== SA02G ==> /sys/block/mmcblk0/device/oemid <== 0x544d # "TM" -> Toshiba ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0225800001000000 ==> /sys/block/mmcblk0/device/serial <== 0x20cddb06 ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SA02G MODALIAS=mmc:block arnd@klappe2:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0 Disk /dev/mmcblk0: 1973 MB, 1973420032 bytes # 1,927,168KB # 2 MB erase block size: align 6291456 pre 1.81ms on 2.39ms post 1.31ms diff 834µs align 4194304 pre 2.07ms on 2.39ms post 1.31ms diff 702µs align 3145728 pre 1.33ms on 1.49ms post 1.32ms diff 162µs align 2097152 pre 2.03ms on 2.4ms post 1.3ms diff 729µs align 1572864 pre 1.34ms on 1.5ms post 1.33ms diff 162µs align 1048576 pre 1.41ms on 1.57ms post 1.33ms diff 195µs align 786432 pre 1.36ms on 1.52ms post 1.35ms diff 165µs #linear access, one erase block arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=1 --blocksize=512 4MiB 5.49M/s 2MiB 4.07M/s 1MiB 4.1M/s 512KiB 4.12M/s 256KiB 4.13M/s 128KiB 5.77M/s 64KiB 9.5M/s 32KiB 8.54M/s 16KiB 6.48M/s 8KiB 3.94M/s 4KiB 1.28M/s 2KiB 543K/s 1KiB 2K/s # random access, one erase block: cannot do random access arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=1 --random --blocksize=2048 4MiB 7.61M/s 2MiB 2.27M/s 1MiB 2.86M/s 512KiB 1.19M/s 256KiB 553K/s 128KiB 309K/s 64KiB 255K/s 32KiB 135K/s # linear access, two erase blocks: cannot be handled either: arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=2 --blocksize=2048 4MiB 7.21M/s 2MiB 9.44M/s 1MiB 4.45M/s 512KiB 1.95M/s 256KiB 944K/s 128KiB 464K/s

14 years, 10 months

Transcend Class 10 micro 8GB

by Arnd Bergmann

arnd@klappe2:~/git/flashbench$ sudo head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 744a4555534420201005402e0500b700 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900003bbd7f800a400000 ==> /sys/block/mmcblk0/device/date <== 07/2011 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/manfid <== 0x000074 ==> /sys/block/mmcblk0/device/name <== USD ==> /sys/block/mmcblk0/device/oemid <== 0x4a45 # ==> "JE" ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235800000000000 ==> /sys/block/mmcblk0/device/serial <== 0x05402e05 ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=USD MODALIAS=mmc:block arnd@klappe2:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0 Disk /dev/mmcblk0: 8018 MB, 8018460672 bytes # > 7,830,528 KB arnd@klappe2:~/git/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 align 12582912 pre 391µs on 729µs post 624µs diff 222µs align 8388608 pre 391µs on 741µs post 641µs diff 225µs align 6291456 pre 413µs on 697µs post 671µs diff 154µs align 4194304 pre 359µs on 741µs post 649µs diff 236µs align 3145728 pre 408µs on 701µs post 654µs diff 170µs align 2097152 pre 405µs on 700µs post 655µs diff 170µs align 1572864 pre 402µs on 701µs post 660µs diff 170µs # --> 4 MB erase block align 32768 pre 389µs on 678µs post 640µs diff 164µs align 24576 pre 386µs on 670µs post 641µs diff 157µs align 16384 pre 391µs on 680µs post 641µs diff 164µs align 12288 pre 535µs on 538µs post 496µs diff 22.9µs align 8192 pre 386µs on 676µs post 646µs diff 160µs align 6144 pre 460µs on 459µs post 422µs diff 17.8µs align 4096 pre 533µs on 532µs post 495µs diff 17.9µs # --> 8 KB page size # linear access in one 4MB erase block: arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=1 4MiB 12M/s 2MiB 10.5M/s 1MiB 10.4M/s 512KiB 10.5M/s 256KiB 9.93M/s 128KiB 10.2M/s 64KiB 10.1M/s 32KiB 6.79M/s 16KiB 4.44M/s # random access, almost as fast: arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=1 --random 4MiB 8.28M/s 2MiB 8.15M/s 1MiB 8.24M/s 512KiB 8.12M/s 256KiB 8.15M/s 128KiB 8.31M/s 64KiB 8.3M/s 32KiB 6.71M/s 16KiB 4.35M/s # across 4 erase blocks, still fast: arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=4 --random 4MiB 10.9M/s 2MiB 7.1M/s 1MiB 9.77M/s 512KiB 9.71M/s 256KiB 9.65M/s 128KiB 9.45M/s 64KiB 9.37M/s 32KiB 6.5M/s 16KiB 4.2M/s # 8 erase blocks, very slow: arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=8 --random 4MiB 9.39M/s 2MiB 3.57M/s 1MiB 2M/s ... # 6 erase blocks, very slow: arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=6 --random 4MiB 9.38M/s 2MiB 4.47M/s 1MiB 2M/s ^C # 5 erase blocks, fast: arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=5 --random 4MiB 8.7M/s 2MiB 10.5M/s 1MiB 10.4M/s 512KiB 10.4M/s 256KiB 10.3M/s 128KiB 10.2M/s 64KiB 9.99M/s 32KiB 6.44M/s 16KiB 4.2M/s # page size! 8KiB 1.62M/s 4KiB 803K/s 2KiB 396K/s 1KiB 189K/s 512B 97B/s # 5 erase blocks linear, same thing but slightly faster: arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=5 --blocksize=512 4MiB 5.98M/s 2MiB 9.52M/s 1MiB 9.41M/s 512KiB 9.45M/s 256KiB 9.35M/s 128KiB 9.2M/s 64KiB 9.1M/s 32KiB 6.47M/s 16KiB 4.1M/s 8KiB 2.15M/s 4KiB 1.23M/s 2KiB 663K/s 1KiB 340K/s # 6 erase blocks linear, also slow: arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --open-au-nr=6 --blocksize=512 4MiB 8.79M/s 2MiB 3.62M/s 1MiB 1.94M/s ^C

14 years, 10 months

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

Flashbench-results