Flashbench-results

flashbench-results@lists.linaro.org

626 discussions

by Arnd Bergmann

Disk /dev/sdc: 8 GB, 8011422720 bytes 255 heads, 63 sectors/track, 974 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sdc1 * 1 973 7815591 b FAT32 arnd@wuerfel:~/flashbench$ sudo ./flashbench -a /dev/sdc --blocksize=1024 align 1073741824 pre 614µs on 711µs post 616µs diff 96.2µs align 536870912 pre 599µs on 702µs post 597µs diff 104µs align 268435456 pre 591µs on 717µs post 592µs diff 126µs align 134217728 pre 598µs on 686µs post 590µs diff 92.2µs align 67108864 pre 595µs on 688µs post 596µs diff 92.2µs align 33554432 pre 600µs on 722µs post 595µs diff 124µs align 16777216 pre 595µs on 705µs post 591µs diff 112µs align 8388608 pre 594µs on 672µs post 601µs diff 74.1µs align 4194304 pre 611µs on 706µs post 616µs diff 92.6µs align 2097152 pre 611µs on 722µs post 611µs diff 110µs align 1048576 pre 603µs on 619µs post 619µs diff 7.93µs align 524288 pre 613µs on 616µs post 615µs diff 1.22µs align 262144 pre 610µs on 614µs post 617µs diff 923ns align 131072 pre 611µs on 617µs post 614µs diff 4.7µs align 65536 pre 614µs on 619µs post 620µs diff 1.61µs align 32768 pre 609µs on 618µs post 615µs diff 5.75µs align 16384 pre 612µs on 617µs post 617µs diff 2.55µs align 8192 pre 609µs on 611µs post 609µs diff 1.91µs align 4096 pre 605µs on 604µs post 606µs diff -1900ns align 2048 pre 609µs on 617µs post 616µs diff 4.75µs arnd@wuerfel:~/flashbench$ sudo ./flashbench --erasesize=2097152 /dev/sdc --open-au --open-au-nr=1 --blocksize=512 2MiB 15.9M/s 1MiB 15.8M/s 512KiB 15.5M/s 256KiB 15.5M/s 128KiB 13.8M/s 64KiB 17.2M/s 32KiB 16.5M/s 16KiB 14.8M/s 8KiB 5.39M/s 4KiB 2.78M/s 2KiB 1.41M/s 1KiB 827K/s 512B 440K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench --erasesize=2097152 /dev/sdc --open-au --open-au-nr=3 --blocksize=512 2MiB 15.7M/s 1MiB 10.2M/s 512KiB 15.6M/s 256KiB 15.7M/s 128KiB 13.9M/s 64KiB 17.5M/s 32KiB 16.8M/s 16KiB 14.6M/s 8KiB 5.4M/s 4KiB 2.7M/s 2KiB 1.41M/s 1KiB 814K/s 512B 442K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench --erasesize=2097152 /dev/sdc --open-au --blocksize=8192 --random --open-au-nr=3 2MiB 15.8M/s 1MiB 11M/s 512KiB 5.81M/s 256KiB 4.11M/s 128KiB 5.5M/s 64KiB 5.85M/s 32KiB 2.97M/s 16KiB 2.69M/s 8KiB 1.68M/s (again:) arnd@wuerfel:~/flashbench$ sudo ./flashbench --erasesize=2097152 /dev/sdc --open-au --blocksize=8192 --random --open-au-nr=3 2MiB 5.2M/s 1MiB 5.2M/s 512KiB 5.13M/s 256KiB 5.19M/s 128KiB 4.89M/s 64KiB 4.07M/s 32KiB 3.83M/s 16KiB 2.89M/s 8KiB 1.61M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench --erasesize=2097152 /dev/sdc --open-au --blocksize=8192 --open-au-nr=3 2MiB 5.94M/s 1MiB 4.58M/s 512KiB 5.97M/s 256KiB 5.09M/s 128KiB 5.9M/s 64KiB 5.66M/s 32KiB 9.88M/s 16KiB 14.8M/s 8KiB 5.42M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench --erasesize=2097152 /dev/sdc --open-au --blocksize=8192 --open-au-nr=3 2MiB 15.8M/s 1MiB 16M/s 512KiB 16M/s 256KiB 15.7M/s 128KiB 13.8M/s 64KiB 17.7M/s 32KiB 16.8M/s 16KiB 14.8M/s 8KiB 5.2M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench --erasesize=2097152 /dev/sdc --open-au --blocksize=8192 --open-au-nr=4 2MiB 11.4M/s 1MiB 11.2M/s 512KiB 4.9M/s 256KiB 2.2M/s 128KiB 941K/s 64KiB 433K/s 32KiB 214K/s 16KiB 107K/s 8KiB 53.2K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench --erasesize=2097152 /dev/sdc --open-au --blocksize=8192 --open-au-nr=4 --random 2MiB 6.25M/s 1MiB 6.79M/s 512KiB 4.98M/s 256KiB 4.19M/s 128KiB 4.62M/s 64KiB 5.88M/s 32KiB 3.39M/s 16KiB 3.2M/s 8KiB 1.42M/s arnd@wuerfel:~/flashbench$ sudo ./flashbench --erasesize=2097152 /dev/sdc --open-au --blocksize=8192 --open-au-nr=5 --random 2MiB 6.84M/s 1MiB 6.59M/s 512KiB 4.48M/s 256KiB 3.33M/s 128KiB 2.57M/s 64KiB 1.45M/s 32KiB 780K/s 16KiB 398K/s 8KiB 199K/s arnd@wuerfel:~/flashbench$ sudo ./flashbench --erasesize=2097152 /dev/sdc --blocksize=8192 -f --fat-nr=8 2MiB 16M/s 16.1M/s 15.9M/s 16M/s 15.8M/s 16M/s 15.8M/s 16M/s 1MiB 16.1M/s 16M/s 16.3M/s 16.1M/s 15.7M/s 16M/s 16.3M/s 16.2M/s 512KiB 15.9M/s 16.1M/s 16.2M/s 16M/s 16M/s 16.1M/s 16.1M/s 15.9M/s 256KiB 16M/s 15.4M/s 15.7M/s 15.8M/s 15.7M/s 15.5M/s 15.9M/s 16.1M/s 128KiB 14.1M/s 14M/s 14M/s 14.1M/s 14.3M/s 14M/s 14M/s 14M/s 64KiB 17.5M/s 17.7M/s 17.9M/s 17.9M/s 17.9M/s 17.8M/s 17.9M/s 17.9M/s 32KiB 16.8M/s 16.8M/s 17M/s 16.8M/s 16.9M/s 16.7M/s 16.6M/s 16.7M/s 16KiB 14.7M/s 14.8M/s 14.8M/s 14.9M/s 14.9M/s 14.9M/s 10.8M/s 14.8M/s 8KiB 5.55M/s 5.51M/s 5.43M/s 5.49M/s 5.55M/s 5.51M/s 5.49M/s 5.49M/s

14 years, 2 months

WIFI + TV mobile phone with the best price

by Picasa Web Albums

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14 years, 2 months

USB Stick: 8GB SanDisk Cruzer Micro (2008)

by Sitsofe Wheeler

I'm not really sure how to generate useful results so here's what I've got so far: # lsusb Bus 001 Device 004: ID 0781:5151 SanDisk Corp. Cruzer Micro Flash Drive # ./flashbench -a /dev/sdb --blocksize=1024 align 2147483648 pre 687µs on 599µs post 495µs diff 7.44µs align 1073741824 pre 635µs on 657µs post 499µs diff 90.3µs align 536870912 pre 601µs on 634µs post 495µs diff 86.1µs align 268435456 pre 602µs on 635µs post 490µs diff 89.5µs align 134217728 pre 621µs on 638µs post 496µs diff 79.5µs align 67108864 pre 602µs on 636µs post 509µs diff 80.4µs align 33554432 pre 606µs on 622µs post 494µs diff 71.8µs align 16777216 pre 614µs on 625µs post 498µs diff 69.3µs align 8388608 pre 602µs on 620µs post 490µs diff 73.2µs align 4194304 pre 601µs on 637µs post 508µs diff 83µs align 2097152 pre 601µs on 653µs post 495µs diff 106µs align 1048576 pre 494µs on 584µs post 511µs diff 81.5µs align 524288 pre 491µs on 510µs post 495µs diff 17µs align 262144 pre 491µs on 511µs post 494µs diff 18.2µs align 131072 pre 493µs on 510µs post 494µs diff 16.3µs align 65536 pre 495µs on 513µs post 494µs diff 18.8µs align 32768 pre 490µs on 511µs post 489µs diff 21.6µs align 16384 pre 493µs on 511µs post 494µs diff 17.9µs align 8192 pre 511µs on 514µs post 495µs diff 11µs align 4096 pre 538µs on 530µs post 496µs diff 12.9µs align 2048 pre 506µs on 515µs post 513µs diff 5.52µs # ./flashbench -f /dev/sdb 4MiB 7.41M/s 7.35M/s 7.37M/s 7.33M/s 7.47M/s 7.39M/s 2MiB 7.37M/s 7.38M/s 7.42M/s 7.3M/s 7.1M/s 4.45M/s 1MiB 7.21M/s 7.06M/s 7.05M/s 7.07M/s 7.14M/s 7.22M/s 512KiB 6.97M/s 6.93M/s 6.92M/s 6.79M/s 6.95M/s 6.95M/s 256KiB 7M/s 6.82M/s 6.95M/s 6.89M/s 7.02M/s 6.71M/s 128KiB 7.51M/s 7.8M/s 7.64M/s 7.43M/s 7.6M/s 7.6M/s 64KiB 10.4M/s 10.2M/s 10.1M/s 10.1M/s 10.1M/s 10.2M/s 32KiB 4.53M/s 4.55M/s 4.48M/s 4.53M/s 4.47M/s 4.45M/s 16KiB 3.77M/s 3.73M/s 3.75M/s 3.75M/s 3.74M/s 3.75M/s A further question is how do I use these results so as to get good performance? Should I be setting the first partition in any particular way and/or passing any special options to mkfs.vfat? -- Sitsofe

14 years, 2 months

flashbench result for SanDisk 31166976 KB SDHC Class4 MMC card

by Amit Pundir

$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=$[4 * 1024] align 8589934592 pre 4.43ms on 4.48ms post 3.9ms diff 320µs align 4294967296 pre 4.56ms on 4.62ms post 4.01ms diff 332µs align 2147483648 pre 4.21ms on 4.45ms post 3.87ms diff 405µs align 1073741824 pre 4.56ms on 4.59ms post 3.97ms diff 327µs align 536870912 pre 4.54ms on 4.5ms post 3.86ms diff 303µs align 268435456 pre 4.49ms on 4.56ms post 3.95ms diff 333µs align 134217728 pre 4.17ms on 4.48ms post 3.87ms diff 459µs align 67108864 pre 4.58ms on 4.61ms post 3.93ms diff 357µs align 33554432 pre 4.02ms on 4.22ms post 3.5ms diff 464µs align 16777216 pre 4.16ms on 4.22ms post 3.55ms diff 367µs align 8388608 pre 4.25ms on 4.2ms post 3.47ms diff 345µs align 4194304 pre 4.16ms on 4.25ms post 3.51ms diff 411µs align 2097152 pre 4.27ms on 4.24ms post 3.54ms diff 340µs align 1048576 pre 4.21ms on 4.32ms post 3.56ms diff 430µs align 524288 pre 4.18ms on 4.26ms post 3.49ms diff 427µs align 262144 pre 3.54ms on 3.58ms post 3.56ms diff 32.1µs align 131072 pre 3.62ms on 3.61ms post 3.54ms diff 29.9µs align 65536 pre 3.44ms on 3.63ms post 3.53ms diff 146µs align 32768 pre 3.55ms on 3.57ms post 3.5ms diff 48µs align 16384 pre 3.44ms on 3.62ms post 3.59ms diff 102µs align 8192 pre 3.62ms on 3.57ms post 3.52ms diff 4.96µs Erase Block size found to be 512KB which is kind of surprising because possibility of a 512KB erase block size is not there in your LWN article. Anyways moving on.. $ sudo ./flashbench -O --erasesize=$[512 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au --random 512KiB 6.14M/s 256KiB 6.39M/s 128KiB 6.3M/s 64KiB 6.16M/s 32KiB 5.75M/s 16KiB 4.64M/s 8KiB 3.39M/s 4KiB 2.23M/s $ sudo ./flashbench -O --erasesize=$[512 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au 512KiB 6.14M/s 256KiB 6.36M/s 128KiB 6.25M/s 64KiB 6.14M/s 32KiB 3.79M/s 16KiB 3.45M/s 8KiB 3.44M/s 4KiB 2.28M/s $ sudo ./flashbench -O --erasesize=$[512 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=1 --random 512KiB 5.68M/s 256KiB 6.22M/s 128KiB 6.33M/s 64KiB 6.29M/s 32KiB 5.93M/s 16KiB 4.9M/s 8KiB 3.3M/s 4KiB 2.19M/s $ sudo ./flashbench -O --erasesize=$[512 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=1 512KiB 6.06M/s 256KiB 6.4M/s 128KiB 6.34M/s 64KiB 6.35M/s 32KiB 4.05M/s 16KiB 4.25M/s 8KiB 5.18M/s 4KiB 3.92M/s Got consistent numbers till open erase block = 17 but beyond that also numbers are not that bad as well. $ sudo ./flashbench -O --erasesize=$[512 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=17 --random 512KiB 5.95M/s 256KiB 5.14M/s 128KiB 4.64M/s 64KiB 5.83M/s 32KiB 5.76M/s 16KiB 4.64M/s 8KiB 2.92M/s 4KiB 2.23M/s $ sudo ./flashbench -O --erasesize=$[512 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=17 512KiB 6.38M/s 256KiB 6.04M/s 128KiB 6.17M/s 64KiB 5.22M/s 32KiB 4.4M/s 16KiB 4.51M/s 8KiB 2.77M/s 4KiB 2.13M/s $ sudo ./flashbench -O --erasesize=$[512 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=18 --random 512KiB 4.27M/s 256KiB 4.54M/s 128KiB 4.12M/s 64KiB 4.53M/s 32KiB 4.36M/s 16KiB 2.71M/s 8KiB 1.35M/s 4KiB 1.5M/s $ sudo ./flashbench -O --erasesize=$[512 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=18 512KiB 6.34M/s 256KiB 5.22M/s 128KiB 5.37M/s 64KiB 4.88M/s 32KiB 5.16M/s 16KiB 3.79M/s 8KiB 3.05M/s 4KiB 2.14M/s

14 years, 2 months

flashbench result for Transcend Micro SD card adapter and unknown class 3941376 KB micro SD card

by Amit Pundir

manfid = 0x000074 oemid = 0x4a45 $ sudo ./flashbench -a /dev/mmcblk0 --blocksize=$[4 * 1024] align 1073741824 pre 1.81ms on 2.11ms post 1.83ms diff 292µs align 536870912 pre 1.75ms on 2.15ms post 1.81ms diff 367µs align 268435456 pre 1.85ms on 2.05ms post 1.82ms diff 214µs align 134217728 pre 1.84ms on 2.04ms post 1.81ms diff 217µs align 67108864 pre 1.77ms on 2.06ms post 1.82ms diff 263µs align 33554432 pre 1.83ms on 2.04ms post 1.81ms diff 223µs align 16777216 pre 1.8ms on 2.07ms post 1.81ms diff 266µs align 8388608 pre 1.79ms on 2.06ms post 1.83ms diff 253µs align 4194304 pre 1.79ms on 2.08ms post 1.83ms diff 270µs align 2097152 pre 1.75ms on 2.06ms post 1.82ms diff 275µs align 1048576 pre 1.84ms on 2.06ms post 1.83ms diff 232µs align 524288 pre 1.93ms on 1.99ms post 1.85ms diff 104µs align 262144 pre 1.9ms on 1.99ms post 1.83ms diff 123µs align 131072 pre 1.93ms on 1.99ms post 1.85ms diff 102µs align 65536 pre 1.9ms on 1.99ms post 1.83ms diff 128µs align 32768 pre 1.9ms on 1.98ms post 1.82ms diff 125µs align 16384 pre 1.87ms on 1.96ms post 1.77ms diff 140µs align 8192 pre 1.72ms on 1.96ms post 1.96ms diff 121µs >From here I can figure out that Erase Block size for this card is 1MB. $ sudo ./flashbench -O --erasesize=$[1 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au --random 1MiB 2.42M/s 512KiB 11.6M/s 256KiB 10.6M/s 128KiB 10.2M/s 64KiB 7.8M/s 32KiB 6.81M/s 16KiB 4.51M/s 8KiB 2.05M/s 4KiB 958K/s $ sudo ./flashbench -O --erasesize=$[1 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au 1MiB 12M/s 512KiB 11.4M/s 256KiB 10.6M/s 128KiB 9.99M/s 64KiB 7.87M/s 32KiB 6.75M/s 16KiB 4.57M/s 8KiB 2.21M/s 4KiB 1M/s $ sudo ./flashbench -O --erasesize=$[1 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=1 --random 1MiB 11.8M/s 512KiB 10.1M/s 256KiB 10.4M/s 128KiB 10.1M/s 64KiB 8.2M/s 32KiB 6.41M/s 16KiB 4.87M/s 8KiB 2.12M/s 4KiB 1.01M/s $ sudo ./flashbench -O --erasesize=$[1 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=1 1MiB 11.1M/s 512KiB 11M/s 256KiB 11.8M/s 128KiB 10.3M/s 64KiB 11.7M/s 32KiB 10.8M/s 16KiB 10.9M/s 8KiB 7.77M/s 4KiB 6.98M/s Till 5 open erase blocks I'm getting consistent not so bad performance but for 6 open erase blocks there is a very sharp decrease in performance numbers. $ sudo ./flashbench -O --erasesize=$[1 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=5 --random 1MiB 4.55M/s 512KiB 11.1M/s 256KiB 10.5M/s 128KiB 9.85M/s 64KiB 8.02M/s 32KiB 6.27M/s 16KiB 4.52M/s 8KiB 2.03M/s 4KiB 956K/s $ sudo ./flashbench -O --erasesize=$[1 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=5 1MiB 11.9M/s 512KiB 11.4M/s 256KiB 11M/s 128KiB 9.61M/s 64KiB 8.3M/s 32KiB 5.89M/s 16KiB 4.61M/s 8KiB 2.28M/s 4KiB 1.25M/s $ sudo ./flashbench -O --erasesize=$[1 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=6 --random 1MiB 2.42M/s 512KiB 1.61M/s 256KiB 756K/s 128KiB 413K/s 64KiB 217K/s 32KiB 111K/s 16KiB 56.3K/s 8KiB 28.2K/s 4KiB 14K/s $ sudo ./flashbench -O --erasesize=$[1 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=6 1MiB 2.41M/s 512KiB 1.62M/s 256KiB 755K/s 128KiB 413K/s 64KiB 217K/s 32KiB 110K/s 16KiB 56.1K/s 8KiB 28K/s 4KiB 14K/s

14 years, 2 months

flashbench results for SanDisk 7761920 KB SDHC Class 2 MMC card

by Amit Pundir

manfid = 0x000003 and, oemid = 0x5344 $ sudo ./flashbench -a /dev/mmcblk0 --blocksize=$[4 * 1024] align 2147483648 pre 3.47ms on 3.74ms post 2.81ms diff 601µs align 1073741824 pre 3.84ms on 3.99ms post 3.15ms diff 494µs align 536870912 pre 3.95ms on 4.05ms post 3.46ms diff 349µs align 268435456 pre 3.42ms on 3.68ms post 3.2ms diff 372µs align 134217728 pre 2.86ms on 3.13ms post 2.72ms diff 341µs align 67108864 pre 2.93ms on 3.35ms post 2.84ms diff 458µs align 33554432 pre 3.9ms on 4.34ms post 3.82ms diff 479µs align 16777216 pre 2.96ms on 3.23ms post 2.26ms diff 624µs align 8388608 pre 2.06ms on 2.66ms post 2.22ms diff 519µs align 4194304 pre 2.98ms on 3.31ms post 2.23ms diff 699µs align 2097152 pre 4.21ms on 4.5ms post 3.86ms diff 461µs align 1048576 pre 4.38ms on 4.63ms post 3.95ms diff 467µs align 524288 pre 3.03ms on 3.22ms post 2.85ms diff 280µs align 262144 pre 2.76ms on 2.98ms post 2.45ms diff 371µs align 131072 pre 2.47ms on 2.7ms post 2.48ms diff 228µs align 65536 pre 2.58ms on 2.97ms post 2.46ms diff 451µs align 32768 pre 2.48ms on 2.69ms post 2.5ms diff 194µs align 16384 pre 3.09ms on 3.28ms post 2.7ms diff 383µs align 8192 pre 2.78ms on 3.01ms post 2.76ms diff 238µs Erase Block size assumed to be 4MB. $ sudo ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au --random 4MiB 4.51M/s 2MiB 4.15M/s 1MiB 3.58M/s 512KiB 3.25M/s 256KiB 4.01M/s 128KiB 3.46M/s 64KiB 3.43M/s 32KiB 2.95M/s 16KiB 2.97M/s 8KiB 2.19M/s 4KiB 1.56M/s $ sudo ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au 4MiB 4.11M/s 2MiB 3.01M/s 1MiB 2.95M/s 512KiB 2.72M/s 256KiB 2.52M/s 128KiB 2.57M/s 64KiB 3.36M/s 32KiB 2.68M/s 16KiB 2.3M/s 8KiB 1.8M/s 4KiB 1.51M/s $ sudo ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=1 --random 4MiB 4.21M/s 2MiB 4.28M/s 1MiB 3.16M/s 512KiB 4.4M/s 256KiB 3.5M/s 128KiB 3.52M/s 64KiB 4.17M/s 32KiB 3.75M/s 16KiB 2.56M/s 8KiB 2.66M/s 4KiB 1.75M/s $ sudo ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=1 4MiB 4.2M/s 2MiB 3.84M/s 1MiB 4.34M/s 512KiB 4.36M/s 256KiB 3.53M/s 128KiB 3.8M/s 64KiB 4.32M/s 32KiB 3.85M/s 16KiB 3.78M/s 8KiB 3.34M/s 4KiB 2.95M/s It gave me a consistent throughput as long as upto 7 erase blocks were open. Performance with 8 open erase blocks is not that bad either. $ sudo ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=7 --random 4MiB 3.73M/s 2MiB 3.02M/s 1MiB 3.14M/s 512KiB 2.88M/s 256KiB 2.48M/s 128KiB 2.34M/s 64KiB 2.16M/s 32KiB 1.96M/s 16KiB 1.55M/s 8KiB 1.04M/s 4KiB 1.01M/s $ sudo ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=7 4MiB 3.4M/s 2MiB 3.1M/s 1MiB 3.01M/s 512KiB 3.12M/s 256KiB 2.91M/s 128KiB 2.87M/s 64KiB 2.58M/s 32KiB 2.78M/s 16KiB 2.37M/s 8KiB 1.85M/s 4KiB 1.28M/s $ sudo ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=8 --random 4MiB 3.66M/s 2MiB 2.94M/s 1MiB 3.04M/s 512KiB 2.55M/s 256KiB 2.46M/s 128KiB 2.27M/s 64KiB 1.96M/s 32KiB 1.53M/s 16KiB 1.38M/s 8KiB 955K/s 4KiB 823K/s $ sudo ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[4 * 1024] /dev/mmcblk0 --open-au-nr=8 4MiB 3.36M/s 2MiB 2.69M/s 1MiB 2.66M/s 512KiB 2.56M/s 256KiB 2.41M/s 128KiB 2.4M/s 64KiB 2.14M/s 32KiB 2.04M/s 16KiB 2.01M/s 8KiB 1.65M/s 4KiB 1.2M/s

14 years, 2 months

Mobile phone factory

by Picasa Web Albums

Dear friend, Good day! Our company is mainly in the OEM and ODM business with all kinds of mobile phone. If you need the detail requirement, please kindly contact us. Best wishes Juce Mobile: 86-13424432252 Tel: 86-0755-85282599 Fax: 86-0755-81752355 E-mail: elink(a)vip.188.com / sales(a)elink-mobile.com Web size: www.elink-mobile.com Factory Address: 5/F, Building 21, ChenTian Industrial Park, Shenzhen, GuangDong Province, China

14 years, 2 months

OCZ RevoDrive 60 GB

by Arnd Bergmann

sudo fdisk -l /dev/sda Disk /dev/sda: 60.0 GB, 60022480896 bytes 255 heads, 63 sectors/track, 7297 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 sudo fdisk -l /dev/sda Disk /dev/sda: 60.0 GB, 60022480896 bytes 255 heads, 63 sectors/track, 7297 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sda doesn't contain a valid partition table arnd@ocdc-kvm:~/git/flashbench$ sudo hdparm -i /dev/sda /dev/sda: Model=OCZ-REVODRIVE, FwRev=1.20, SerialNo=OCZ-V8WN0QLPF80W8L99 Config={ Fixed } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4 BuffType=unknown, BuffSize=unknown, MaxMultSect=16, MultSect=1 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=117231408 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 udma6 AdvancedPM=no WriteCache=disabled Drive conforms to: unknown: ATA/ATAPI-2,3,4,5,6,7 * signifies the current active mode sudo hdparm -W0 /dev/sda /dev/sda: setting drive write-caching to 0 (off) write-caching = 0 (off) $ sudo ./flashbench -a /dev/sda --count=100 align 8589934592 pre 108µs on 124µs post 90.8µs diff 25µs align 4294967296 pre 102µs on 108µs post 91.1µs diff 11.5µs align 2147483648 pre 108µs on 127µs post 91.4µs diff 27.2µs align 1073741824 pre 113µs on 132µs post 91.1µs diff 30.3µs align 536870912 pre 114µs on 134µs post 92.5µs diff 30.9µs align 268435456 pre 123µs on 144µs post 90.9µs diff 37.5µs align 134217728 pre 100µs on 117µs post 91.7µs diff 20.8µs align 67108864 pre 117µs on 140µs post 105µs diff 29.4µs align 33554432 pre 116µs on 136µs post 91.3µs diff 32.4µs align 16777216 pre 109µs on 129µs post 92.6µs diff 28µs align 8388608 pre 120µs on 144µs post 90.8µs diff 38.2µs align 4194304 pre 91.5µs on 91.6µs post 91.1µs diff 244ns align 2097152 pre 91.1µs on 91µs post 91µs diff -56ns align 1048576 pre 91.2µs on 91µs post 91.3µs diff -186ns align 524288 pre 91µs on 90.9µs post 91.1µs diff -132ns align 262144 pre 91.5µs on 91.2µs post 91.4µs diff -288ns align 131072 pre 91.4µs on 91.3µs post 91.3µs diff -92ns align 65536 pre 91.4µs on 91µs post 91.3µs diff -345ns align 32768 pre 90.9µs on 91.2µs post 91.3µs diff 142ns time sudo ./flashbench --erasesize=8388608 /dev/sda --blocksize=4096 -p [sudo] password for arnd: 2MiB 209M/s 236M/s 103M/s 198M/s 234M/s 234M/s 101M/s 195M/s 1MiB 228M/s 230M/s 103M/s 194M/s 228M/s 231M/s 96.7M/s 200M/s 512KiB 216M/s 224M/s 105M/s 180M/s 220M/s 226M/s 86.2M/s 190M/s 256KiB 203M/s 210M/s 114M/s 174M/s 200M/s 207M/s 120M/s 175M/s 128KiB 178M/s 189M/s 129M/s 153M/s 182M/s 183M/s 128M/s 157M/s 64KiB 152M/s 156M/s 141M/s 145M/s 187M/s 195M/s 129M/s 133M/s 32KiB 162M/s 177M/s 142M/s 118M/s 173M/s 182M/s 135M/s 108M/s 16KiB 140M/s 143M/s 134M/s 88.1M/s 139M/s 143M/s 135M/s 86.2M/s 8KiB 96.2M/s 98M/s 96M/s 68.3M/s 97.8M/s 98.7M/s 95.7M/s 64M/s 4KiB 63.2M/s 60M/s 60.1M/s 41.6M/s 62.8M/s 61.1M/s 60.1M/s 41.6M/s 2KiB 20.3M/s 25M/s 24.8M/s 25.4M/s 14.3M/s 19.1M/s 14.8M/s 20.3M/s 1KiB 12.6M/s 13.8M/s 13.9M/s 15.7M/s 8.05M/s 10.4M/s 8.08M/s 11.5M/s 512B 7.07M/s 7.32M/s 7.32M/s 7.86M/s 4.32M/s 5.44M/s 4.21M/s 5.93M/s $ sudo ./flashbench --open-au --erasesize=8388608 /dev/sda --blocksize=512 --open-au-nr=1 8MiB 103M/s 4MiB 77.5M/s 2MiB 106M/s 1MiB 106M/s 512KiB 106M/s 256KiB 88.6M/s 128KiB 99.6M/s 64KiB 102M/s 32KiB 90M/s 16KiB 88.8M/s 8KiB 88.9M/s 4KiB 58.3M/s 2KiB 16.5M/s 1KiB 11.8M/s 512B 6.72M/s arnd@ocdc-kvm:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=8388608 /dev/sda --blocksize=512 --open-au-nr=1 --offset=$[63 * 512] 8MiB 100M/s 4MiB 103M/s 2MiB 103M/s 1MiB 73.9M/s 512KiB 96.6M/s 256KiB 85.6M/s 128KiB 69.6M/s 64KiB 59.9M/s 32KiB 36.1M/s 16KiB 37.3M/s 8KiB 18.2M/s 4KiB 15.8M/s 2KiB 14.3M/s 1KiB 10.4M/s 512B 5.85M/s arnd@ocdc-kvm:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=8388608 /dev/sda --blocksize=512 --open-au-nr=1 --offset=4096 8MiB 102M/s 4MiB 106M/s 2MiB 87.4M/s 1MiB 92.6M/s 512KiB 104M/s 256KiB 99M/s 128KiB 88M/s 64KiB 90.7M/s 32KiB 92.9M/s 16KiB 96.3M/s 8KiB 79.9M/s 4KiB 53.1M/s 2KiB 14.7M/s 1KiB 10.9M/s 512B 6.17M/s arnd@ocdc-kvm:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024 * 1024] /dev/sda --blocksize=2048 --open-au-nr=64 1MiB 99.1M/s 512KiB 102M/s 256KiB 97.2M/s 128KiB 98.4M/s 64KiB 94.5M/s 32KiB 87.1M/s 16KiB 91.2M/s 8KiB 80.8M/s 4KiB 54.7M/s 2KiB 10.6M/s arnd@ocdc-kvm:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024 * 1024] /dev/sda --blocksize=2048 --random --open-au-nr=64 1MiB 102M/s 512KiB 97.5M/s 256KiB 96.3M/s 128KiB 95.8M/s 64KiB 89.2M/s 32KiB 89.6M/s 16KiB 83.7M/s 8KiB 82.8M/s 4KiB 53.8M/s 2KiB 11.3M/s arnd@ocdc-kvm:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024 * 1024] /dev/sda --blocksize=2048 --random --open-au-nr=64 --offset=4096 1MiB 97.5M/s 512KiB 98.8M/s 256KiB 99.4M/s 128KiB 94.6M/s 64KiB 91.3M/s 32KiB 89.5M/s 16KiB 90.3M/s 8KiB 82.5M/s 4KiB 55.3M/s 2KiB 11.3M/s arnd@ocdc-kvm:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024 * 1024] /dev/sda --blocksize=2048 --random --open-au-nr=64 --offset=2048 1MiB 92.2M/s 512KiB 91.2M/s 256KiB 78.7M/s 128KiB 69.1M/s 64KiB 44M/s 32KiB 32.5M/s 16KiB 23.8M/s 8KiB 15.8M/s 4KiB 10.9M/s 2KiB 11.2M/s

14 years, 2 months

extrmemory 16 GB class 6 performance

by Arnd Bergmann

arnd@klappe2:~/git/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 align 3221225472 pre 1.26ms on 1.59ms post 1.22ms diff 351Âµs align 2147483648 pre 1.41ms on 1.68ms post 1.27ms diff 338Âµs align 1610612736 pre 1.49ms on 1.67ms post 1.25ms diff 301Âµs align 1073741824 pre 1.37ms on 1.65ms post 1.25ms diff 344Âµs align 805306368 pre 1.27ms on 1.55ms post 1.17ms diff 334Âµs align 536870912 pre 1.16ms on 1.56ms post 1.16ms diff 403Âµs align 402653184 pre 1.23ms on 1.52ms post 1.11ms diff 354Âµs align 268435456 pre 1.09ms on 1.48ms post 1.08ms diff 389Âµs align 201326592 pre 1.16ms on 1.4ms post 1.09ms diff 282Âµs align 134217728 pre 1.3ms on 1.56ms post 1.09ms diff 362Âµs align 100663296 pre 1.33ms on 1.54ms post 1.08ms diff 340Âµs align 67108864 pre 1.2ms on 1.54ms post 1.09ms diff 399Âµs align 50331648 pre 1.27ms on 1.45ms post 1.1ms diff 270Âµs align 33554432 pre 1.21ms on 1.5ms post 1.1ms diff 340Âµs align 25165824 pre 1.27ms on 1.5ms post 1.13ms diff 297Âµs align 16777216 pre 1.15ms on 1.47ms post 1.12ms diff 338Âµs align 12582912 pre 1.3ms on 1.52ms post 1.14ms diff 302Âµs align 8388608 pre 1.3ms on 1.63ms post 1.13ms diff 416Âµs align 6291456 pre 1.32ms on 1.56ms post 1.21ms diff 295Âµs align 4194304 pre 1.21ms on 1.48ms post 1.16ms diff 299Âµs align 3145728 pre 1.17ms on 1.27ms post 1.17ms diff 99.4Âµs align 2097152 pre 1.25ms on 1.58ms post 1.13ms diff 388Âµs align 1572864 pre 1.25ms on 1.39ms post 1.26ms diff 139Âµs align 1048576 pre 1.24ms on 1.37ms post 1.24ms diff 134Âµs align 786432 pre 1.24ms on 1.37ms post 1.24ms diff 136Âµs align 524288 pre 1.24ms on 1.37ms post 1.24ms diff 127Âµs align 393216 pre 1.25ms on 1.37ms post 1.24ms diff 127Âµs align 262144 pre 1.24ms on 1.39ms post 1.25ms diff 140Âµs align 196608 pre 1.25ms on 1.37ms post 1.24ms diff 127Âµs align 131072 pre 1.26ms on 1.4ms post 1.26ms diff 134Âµs align 98304 pre 1.25ms on 1.4ms post 1.26ms diff 140Âµs align 65536 pre 1.27ms on 1.39ms post 1.26ms diff 128Âµs align 49152 pre 1.27ms on 1.39ms post 1.24ms diff 141Âµs align 32768 pre 1.25ms on 1.38ms post 1.24ms diff 135Âµs align 24576 pre 1.22ms on 1.26ms post 1.22ms diff 42.4Âµs align 16384 pre 1.23ms on 1.35ms post 1.22ms diff 130Âµs align 12288 pre 1.23ms on 1.29ms post 1.25ms diff 48.3Âµs align 8192 pre 1.22ms on 1.26ms post 1.22ms diff 42.2Âµs align 6144 pre 1.22ms on 1.26ms post 1.22ms diff 43.4Âµs align 4096 pre 1.22ms on 1.26ms post 1.22ms diff 43.9Âµs align 3072 pre 1.22ms on 1.22ms post 1.22ms diff -844ns align 2048 pre 1.22ms on 1.26ms post 1.22ms diff 42.5Âµs arnd@klappe2:~/git/flashbench$ head /sys/block/mmcblk0/device/* ==> /sys/block/mmcblk0/device/cid <== 275048534431364720e5000e12008b00 ==> /sys/block/mmcblk0/device/csd <== 400e00325b59000078377f800a400000 ==> /sys/block/mmcblk0/device/date <== 11/2008 ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x2 ==> /sys/block/mmcblk0/device/manfid <== 0x000027 ==> /sys/block/mmcblk0/device/name <== SD16G ==> /sys/block/mmcblk0/device/oemid <== 0x5048 ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235000001000000 ==> /sys/block/mmcblk0/device/serial <== 0xe5000e12 ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SD16G MODALIAS=mmc:block arnd@klappe2:~/git/flashbench$ sudo fdisk -ul /dev/mmcblk0 Disk /dev/mmcblk0: 16.1 GB, 16135487488 bytes 64 heads, 32 sectors/track, 15388 cylinders, total 31514624 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: 0x0008041b Device Boot Start End Blocks Id System /dev/mmcblk0p1 * 32 31514623 15757296 c W95 FAT32 (LBA) arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[4194304/2] --blocksize=8192 /dev/mmcblk0 --random --findfat --fat-nr=6 2MiB 2.69M/s 2.75M/s 2.66M/s 2.78M/s 10.5M/s 10.4M/s 1MiB 2.77M/s 2.79M/s 2.71M/s 2.69M/s 7.87M/s 5.76M/s 512KiB 2.66M/s 2.78M/s 2.74M/s 2.75M/s 4.06M/s 4.16M/s 256KiB 2.76M/s 2.76M/s 2.75M/s 2.69M/s 3.88M/s 3.88M/s 128KiB 2.71M/s 2.7M/s 2.8M/s 2.77M/s 3.78M/s 3.61M/s 64KiB 2.77M/s 2.81M/s 2.74M/s 2.7M/s 2.68M/s 2.68M/s 32KiB 2.25M/s 2.28M/s 2.22M/s 2.26M/s 3.12M/s 3.08M/s 16KiB 1.76M/s 1.8M/s 1.77M/s 1.77M/s 1.93M/s 1.95M/s 8KiB 1.05M/s 985K/s 925K/s 1.01M/s 1.02M/s 1.06M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[4194304/2] --blocksize=512 /dev/mmcblk0 --findfat --fat-nr=6 2MiB 3.87M/s 2.82M/s 2.78M/s 2.74M/s 3.96M/s 3.95M/s 1MiB 2.77M/s 2.7M/s 2.72M/s 2.73M/s 4.16M/s 4.14M/s 512KiB 2.77M/s 2.76M/s 2.17M/s 2.77M/s 3.92M/s 3.93M/s 256KiB 2.75M/s 2.72M/s 2.74M/s 2.75M/s 10.2M/s 10.2M/s 128KiB 2.72M/s 2.77M/s 2.75M/s 2.74M/s 10.6M/s 10.5M/s 64KiB 2.74M/s 2.77M/s 2.77M/s 2.75M/s 10.5M/s 10.5M/s 32KiB 2.29M/s 2.27M/s 2.27M/s 2.27M/s 8.75M/s 8.75M/s 16KiB 1.78M/s 1.79M/s 1.81M/s 1.77M/s 6.48M/s 6.46M/s 8KiB 970K/s 992K/s 986K/s 989K/s 1.53M/s 1.59M/s 4KiB 524K/s 521K/s 519K/s 510K/s 627K/s 647K/s 2KiB 263K/s 268K/s 263K/s 269K/s 318K/s 302K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[4194304] --blocksize=8192 /dev/mmcblk0 --open-au --open-au-nr=3 4MiB 7.2M/s 2MiB 8.34M/s 1MiB 9.02M/s 512KiB 10.5M/s 256KiB 10.3M/s 128KiB 10.5M/s 64KiB 10.3M/s 32KiB 8.72M/s 16KiB 6.48M/s 8KiB 1.35M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[4194304] --blocksize=8192 /dev/mmcblk0 --open-au --open-au-nr=4 4MiB 9.26M/s 2MiB 10.3M/s 1MiB 4.99M/s 512KiB 2.62M/s ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[4194304/2] --blocksize=8192 /dev/mmcblk0 --open-au --open-au-nr=3 2MiB 5.01M/s 1MiB 3.91M/s 512KiB 3.96M/s 256KiB 5.81M/s 128KiB 4.03M/s 64KiB 4.97M/s 32KiB 3.92M/s 16KiB 3.06M/s 8KiB 1.4M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[4194304] --blocksize=8192 /dev/mmcblk0 --open-au --open-au-nr=3 --random 4MiB 8.31M/s 2MiB 7.12M/s 1MiB 4.97M/s 512KiB 2.89M/s 256KiB 1.74M/s 128KiB 1.14M/s 64KiB 585K/s 32KiB 299K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[4194304] --blocksize=8192 /dev/mmcblk0 --open-au --open-au-nr=1 --random 4MiB 6.39M/s 2MiB 4.83M/s 1MiB 4.02M/s 512KiB 4.67M/s 256KiB 4.47M/s 128KiB 3.43M/s 64KiB 3.45M/s 32KiB 2.93M/s 16KiB 2.12M/s 8KiB 1.02M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[4194304] --blocksize=8192 /dev/mmcblk0 --open-au --open-au-nr=2 --random 4MiB 7.91M/s 2MiB 5.77M/s 1MiB 4.62M/s 512KiB 3.03M/s 256KiB 1.85M/s 128KiB 1.2M/s 64KiB 598K/s 32KiB 305K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[4194304 / 2] --blocksize=8192 /dev/mmcblk0 --open-au --open-au-nr=2 --random 2MiB 5.97M/s 1MiB 4.54M/s 512KiB 3.52M/s 256KiB 3.98M/s 128KiB 3.3M/s 64KiB 3.61M/s 32KiB 2.72M/s 16KiB 2.08M/s 8KiB 1.03M/s

14 years, 2 months

16 GB extrememory HyPerformance (2009)

by Arnd Bergmann

==> /sys/block/mmcblk0/device/cid <== 1d41445344202020102810091d009c00 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900007b7d7f800a400000 ==> /sys/block/mmcblk0/device/date <== 12/2009 ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/manfid <== 0x00001d ==> /sys/block/mmcblk0/device/name <== SD ==> /sys/block/mmcblk0/device/oemid <== 0x4144 ==> /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 <== 0235800000000000 ==> /sys/block/mmcblk0/device/serial <== 0x2810091d ==> /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: 16.6 GB, 16574840832 bytes 4 heads, 16 sectors/track, 505824 cylinders, total 32372736 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: 0x00092313 Device Boot Start End Blocks Id System /dev/mmcblk0p1 8192 1023999 507904 82 Linux swap / Solaris Partition 1 does not end on cylinder boundary. /dev/mmcblk0p2 1024000 31342591 15159296 83 Linux Partition 2 does not end on cylinder boundary. arnd@klappe2:~/git/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 align 3221225472 pre 1.09ms on 1.45ms post 1.07ms diff 373Âµs align 2147483648 pre 1.1ms on 1.48ms post 1.08ms diff 389Âµs align 1610612736 pre 1.03ms on 1.31ms post 1.08ms diff 255Âµs align 1073741824 pre 1.1ms on 1.51ms post 1.08ms diff 411Âµs align 805306368 pre 1.04ms on 1.31ms post 1.08ms diff 245Âµs align 536870912 pre 1.01ms on 1.3ms post 1.07ms diff 259Âµs align 402653184 pre 1.01ms on 1.36ms post 1.06ms diff 326Âµs align 268435456 pre 994Âµs on 1.36ms post 1.08ms diff 329Âµs align 201326592 pre 973Âµs on 1.35ms post 1.06ms diff 337Âµs align 134217728 pre 994Âµs on 1.36ms post 1.07ms diff 327Âµs align 100663296 pre 978Âµs on 1.36ms post 1.07ms diff 333Âµs align 67108864 pre 993Âµs on 1.35ms post 1.07ms diff 318Âµs align 50331648 pre 980Âµs on 1.36ms post 1.07ms diff 336Âµs align 33554432 pre 994Âµs on 1.36ms post 1.07ms diff 322Âµs align 25165824 pre 995Âµs on 1.36ms post 1.08ms diff 320Âµs align 16777216 pre 997Âµs on 1.32ms post 1.07ms diff 287Âµs align 12582912 pre 961Âµs on 1.37ms post 1.07ms diff 350Âµs align 8388608 pre 976Âµs on 1.35ms post 1.07ms diff 330Âµs align 6291456 pre 1.14ms on 1.24ms post 1.14ms diff 95Âµs align 4194304 pre 943Âµs on 1.31ms post 1.07ms diff 297Âµs align 3145728 pre 967Âµs on 1.17ms post 989Âµs diff 193Âµs align 2097152 pre 1.05ms on 1.09ms post 1.05ms diff 43.8Âµs align 1572864 pre 1.05ms on 1.07ms post 1.03ms diff 33.1Âµs align 1048576 pre 1.06ms on 1.11ms post 1.04ms diff 59.9Âµs align 786432 pre 1.04ms on 1.1ms post 1.03ms diff 63.5Âµs align 524288 pre 1.08ms on 1.09ms post 1.03ms diff 30.7Âµs align 393216 pre 1.06ms on 1.06ms post 1.05ms diff 4.74Âµs align 262144 pre 1.07ms on 1.1ms post 1.04ms diff 50.4Âµs align 196608 pre 1.05ms on 1.06ms post 1.06ms diff 4.11Âµs align 131072 pre 1.04ms on 1.09ms post 1.03ms diff 49.6Âµs align 98304 pre 1.07ms on 1.07ms post 954Âµs diff 63.3Âµs align 65536 pre 1.08ms on 1.1ms post 1.04ms diff 38.5Âµs align 49152 pre 1.04ms on 1.06ms post 998Âµs diff 39.8Âµs align 32768 pre 1.03ms on 1.04ms post 942Âµs diff 53.8Âµs align 24576 pre 969Âµs on 981Âµs post 966Âµs diff 13.6Âµs align 16384 pre 1.07ms on 1.09ms post 974Âµs diff 70Âµs align 12288 pre 999Âµs on 1ms post 996Âµs diff 4.72Âµs ^C arnd@klappe2:~/git/flashbench$ ./flashbench --erasesize=4194304 --blocksize=2048 /dev/mmcblk0 --open-au --open-au-nr=1 sched_setscheduler: Operation not permitted /dev/mmcblk0: Permission denied arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 --blocksize=2048 /dev/mmcblk0 --open-au --open-au-nr=1 4MiB 5.19M/s 2MiB 9.33M/s 1MiB 7.56M/s 512KiB 6.99M/s 256KiB 8.29M/s 128KiB 8.11M/s 64KiB 7.33M/s 32KiB 5.84M/s 16KiB 3.64M/s 8KiB 1.55M/s 4KiB 797K/s 2KiB 459K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 --blocksize=2048 /dev/mmcblk0 --open-au --open-au-nr=1 4MiB 8.65M/s 2MiB 7.49M/s 1MiB 7.89M/s 512KiB 8.51M/s 256KiB 8.32M/s 128KiB 7.41M/s 64KiB 7.88M/s 32KiB 5.61M/s 16KiB 3.5M/s 8KiB 1.8M/s 4KiB 819K/s 2KiB 455K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 --blocksize=2048 /dev/mmcblk0 --open-au --open-au-nr=1 --random 4MiB 4.68M/s 2MiB 7.64M/s 1MiB 8.07M/s 512KiB 8.85M/s 256KiB 8M/s 128KiB 7.52M/s 64KiB 8.3M/s 32KiB 5.84M/s 16KiB 3.79M/s 8KiB 1.51M/s 4KiB 729K/s 2KiB 357K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 --blocksize=2048 /dev/mmcblk0 --open-au --open-au-nr=2 --random 4MiB 4.91M/s 2MiB 8.44M/s 1MiB 7.47M/s 512KiB 7.65M/s 256KiB 8.4M/s 128KiB 8.58M/s 64KiB 7.14M/s 32KiB 5.4M/s 16KiB 3.46M/s 8KiB 1.42M/s 4KiB 699K/s 2KiB 343K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 --blocksize=4096 /dev/mmcblk0 --open-au --open-au-nr=4 --random 4MiB 6.68M/s 2MiB 6.92M/s 1MiB 7.46M/s 512KiB 7.72M/s 256KiB 8.57M/s 128KiB 8.31M/s 64KiB 7.12M/s 32KiB 5.48M/s 16KiB 3.25M/s 8KiB 1.41M/s 4KiB 700K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 --blocksize=8192 /dev/mmcblk0 --open-au --open-au-nr=5 --random 4MiB 8.84M/s 2MiB 6.45M/s 1MiB 7.48M/s 512KiB 7.89M/s 256KiB 8.61M/s 128KiB 8.07M/s 64KiB 7.2M/s 32KiB 5.42M/s 16KiB 3.53M/s 8KiB 1.41M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 --blocksize=8192 /dev/mmcblk0 --open-au --open-au-nr=6 --random 4MiB 8.45M/s 2MiB 3.78M/s 1MiB 2.12M/s 512KiB 1.18M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 --blocksize=8192 /dev/mmcblk0 --open-au --open-au-nr=8 --random 4MiB 6.17M/s 2MiB 3.73M/s 1MiB 2.12M/s 512KiB 1.18M/s ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 --blocksize=8192 /dev/mmcblk0 --open-au --open-au-nr=5 4MiB 7.98M/s 2MiB 8.07M/s 1MiB 8.21M/s 512KiB 9.03M/s 256KiB 9.35M/s 128KiB 7.77M/s 64KiB 8.03M/s 32KiB 5.71M/s 16KiB 3.85M/s 8KiB 1.57M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=4194304 --blocksize=8192 /dev/mmcblk0 --open-au --open-au-nr=6 4MiB 8.58M/s 2MiB 4.29M/s 1MiB 2.12M/s 512KiB 1.18M/s ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench --erasesize=$[4194304] --blocksize=8192 /dev/mmcblk0 --random --findfat --fat-nr=6 4MiB 9.05M/s 8.88M/s 8.47M/s 8.53M/s 7.29M/s 9.03M/s 2MiB 8.78M/s 8.79M/s 9.03M/s 8.91M/s 7.66M/s 9.04M/s 1MiB 7.44M/s 7.39M/s 7.23M/s 7.33M/s 8.55M/s 7.26M/s 512KiB 7.39M/s 7.47M/s 7.56M/s 7.46M/s 8.53M/s 7.48M/s 256KiB 8.82M/s 8.41M/s 8.64M/s 8.75M/s 7.34M/s 8.7M/s 128KiB 8.74M/s 8.73M/s 8.63M/s 8.76M/s 7.66M/s 8.74M/s 64KiB 7.17M/s 7.36M/s 7.36M/s 7.34M/s 8.51M/s 7.35M/s 32KiB 5.79M/s 5.82M/s 5.78M/s 5.85M/s 5.66M/s 5.83M/s 16KiB 3.73M/s 3.72M/s 3.77M/s 3.67M/s 3.64M/s 3.65M/s 8KiB 1.46M/s 1.48M/s 1.46M/s 1.47M/s 1.47M/s 1.47M/s

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