Flashbench-results

flashbench-results@lists.linaro.org

174 discussions

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

15 years, 6 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

15 years, 6 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

15 years, 6 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

15 years, 6 months

Re: [Flashbench] flashbench of OlexM1 w/SanDisk 32GB CF-kort

by Arnd Bergmann

On Wednesday 13 April 2011, Joacim Thomassen wrote: > Hi Arnd, > > I tried to deliver the test result to the list but got this error: > > Delivery to the following recipient failed permanently: > > flashbench-erase(a)lists.linaro.org > > Technical details of permanent failure: > Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 unknown user (state 14). > Where did you get that address? The correct email is flashbench-results(a)lists.linaro.org, if I wrote that incorrectly somewhere, I should definitely correct it. > Anyway, here are the results for the SanDisk Compact Flash card: Thank you very much! > ubuntu@ubuntu:~$ cat /proc/partitions > major minor #blocks name > > 7 0 687976 loop0 > 8 0 31250432 sda > 8 1 31250416 sda1 > > ubuntu@ubuntu:~$ sudo hdparm -i /dev/sda > > /dev/sda: > > Model=SanDisk, FwRev=HDX, SerialNo=CBZ011811204505 > Config={ HardSect NotMFM Removeable DTR>10Mbs nonMagnetic } > RawCHS=62004/16/63, TrkSize=0, SectSize=576, ECCbytes=4 > BuffType=DualPort, BuffSize=1kB, MaxMultSect=1, MultSect=1 > CurCHS=62004/16/63, CurSects=62500032, LBA=yes, LBAsects=62500864 > 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 > UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 > AdvancedPM=yes: disabled (255) WriteCache=enabled > Drive conforms to: Unspecified: ATA/ATAPI-4 > > * signifies the current active mode > > ubuntu@ubuntu:~$ sudo flashbench -a -b 1024 /dev/sda > align 8589934592 pre 717µs on 997µs post 765µs diff 256µs > align 4294967296 pre 729µs on 978µs post 751µs diff 238µs > align 2147483648 pre 712µs on 1ms post 761µs diff 266µs > align 1073741824 pre 760µs on 997µs post 750µs diff 242µs > align 536870912 pre 752µs on 1.02ms post 793µs diff 252µs > align 268435456 pre 759µs on 1.04ms post 788µs diff 265µs > align 134217728 pre 802µs on 1.04ms post 797µs diff 240µs > align 67108864 pre 844µs on 1.08ms post 839µs diff 242µs > align 33554432 pre 729µs on 1.01ms post 791µs diff 246µs > align 16777216 pre 705µs on 987µs post 795µs diff 237µs > align 8388608 pre 716µs on 954µs post 765µs diff 213µs > align 4194304 pre 717µs on 988µs post 797µs diff 231µs > align 2097152 pre 718µs on 991µs post 799µs diff 232µs > align 1048576 pre 717µs on 986µs post 796µs diff 230µs > align 524288 pre 717µs on 987µs post 797µs diff 230µs > align 262144 pre 707µs on 990µs post 798µs diff 237µs > align 131072 pre 678µs on 985µs post 790µs diff 251µs > align 65536 pre 678µs on 957µs post 763µs diff 236µs > align 32768 pre 680µs on 957µs post 761µs diff 237µs > align 16384 pre 763µs on 904µs post 650µs diff 198µs > align 8192 pre 762µs on 801µs post 764µs diff 37.6µs > align 4096 pre 763µs on 797µs post 764µs diff 34.2µs > align 2048 pre 765µs on 799µs post 764µs diff 34.5µs The data must be misleading on this card. Unfortunately, flashbench -a is not completely reliable in finding out the erase block size. From the LBAsects=62500864 line above, I conclude that the actual size of the erase block is probably 2 MB, as that is the largest power-of-two number that is a fraction of the size (15259 * 2 MB). > root@ubuntu:/home/ubuntu/flashbench# for i in `seq 1 10`; do echo $i; > flashbench -O --erasesize=$[64 * 1024 * 1024] /dev/sda --open-au-nr=$i > --random; done > 1 > 64MiB 39.3M/s > 32MiB 70.1M/s > 16MiB 70.2M/s > 8MiB 25.8M/s > 4MiB 18M/s > 2MiB 9.41M/s > 1MiB 4.93M/s > 512KiB 2.35M/s > 256KiB 1.14M/s > 128KiB 596K/s > 64KiB 3.87M/s > 32KiB 3.05M/s > 16KiB 2.12M/s The performance of this card is pretty amazing, I have not seen that yet on a CF card. There might be a write cache on the card itself, as hdparm claims, so if that is the case, you should probably disable that cache using hdparm -W 0 /dev/sda during your measurements (not during actual use of course). One thing that is rather clear from this data is that this card is heavily optimized for extremely long writes, 16 MB or longer seem to be ideal. When you do --random writes, writing 128 KB takes roughly the same time as writing 16 MB! This could be a hint that the erase size is really 16 MB. The card evidently also optimizes for random writes up to 64 KB by treating them differently than any larger ones. When you do a 128 KB write or larger, it must be writing the entire 16 MB anyway. It would be nice if you could rerun your test without --random, and with both 2 MB and 16 MB erase size. > 2 > 64MiB 51.6M/s > 32MiB 70.1M/s > 16MiB 70.2M/s > 8MiB 48.9M/s > 4MiB 14.7M/s > 2MiB 5.82M/s > 1MiB 3.22M/s > 512KiB 1.57M/s > 256KiB 790K/s > 128KiB 392K/s > 64KiB 2.72M/s > 32KiB 1.74M/s > 16KiB 1.61M/s Unfortunately, the larger numbers don't provide more insight here. > root@ubuntu:/home/ubuntu/flashbench# flashbench --findfat --fat-nr=10 > --erasesize=$[64 * 1024 * 1024] --blocksize=1024 /dev/sda > 64MiB 47.1M/s 70M/s 69.9M/s 69.8M/s 69M/s 70.3M/s 70.4M/s > 70.3M/s 65.5M/s 70.2M/s > 32MiB 69.3M/s 70.4M/s 70M/s 70.4M/s 70.4M/s 70.4M/s 68.4M/s > 70.4M/s 70.5M/s 70.4M/s > 16MiB 43.7M/s 58.2M/s 70.4M/s 70.4M/s 69.4M/s 66.4M/s 70.3M/s > 69.4M/s 58.6M/s 70.5M/s > 8MiB 70.3M/s 70.4M/s 69.4M/s 58M/s 70.3M/s 58.7M/s 38.8M/s > 70.3M/s 69.3M/s 70.3M/s > 4MiB 69.3M/s 69.9M/s 70.3M/s 70.3M/s 69.1M/s 70.3M/s 70.3M/s > 66.2M/s 69.3M/s 70.3M/s > 2MiB 69.1M/s 69.8M/s 70.2M/s 66.1M/s 70.1M/s 70.2M/s 68.1M/s > 70.3M/s 70.2M/s 70.2M/s > 1MiB 69.3M/s 64.6M/s 70M/s 70.1M/s 64.8M/s 69.9M/s 70M/s > 64.5M/s 69.9M/s 65.6M/s > 512KiB 65.2M/s 61.1M/s 68.6M/s 68.7M/s 69.7M/s 69.7M/s 43M/s > 69.5M/s 69.6M/s 68.6M/s > 256KiB 60M/s 61M/s 60.8M/s 60.8M/s 60.4M/s 60.9M/s 60.9M/s > 60.7M/s 60.2M/s 60.8M/s > 128KiB 68M/s 61.2M/s 63.4M/s 69.3M/s 69.3M/s 68.4M/s 68.4M/s > 69.3M/s 69.3M/s 69.3M/s > 64KiB 37M/s 54.8M/s 55.4M/s 54.9M/s 55.2M/s 55.3M/s 55.4M/s > 54.7M/s 55.4M/s 55.8M/s > 32KiB 23.9M/s 23.9M/s 23.9M/s 24M/s 24.2M/s 19.9M/s 24.1M/s > 24.2M/s 23.9M/s 24M/s > 16KiB 8.89M/s 8.91M/s 8.94M/s 8.28M/s 8.95M/s 8.99M/s 8.82M/s > 8.73M/s 8.91M/s 8.97M/s > 8KiB 5.02M/s 4.81M/s 5.03M/s 5.02M/s 5.02M/s 5.02M/s 5.02M/s > 5.03M/s 5.02M/s 5.03M/s > 4KiB 2.11M/s 2.14M/s 2.11M/s 2.14M/s 2.12M/s 2.14M/s 2.12M/s > 2.11M/s 2.12M/s 2.14M/s > 2KiB 1.1M/s 1.11M/s 1.11M/s 1.11M/s 1.11M/s 1.09M/s 1.11M/s > 1.11M/s 1.11M/s 1.11M/s > 1KiB 545K/s 546K/s 543K/s 546K/s 546K/s 546K/s 547K/s > 544K/s 546K/s 546K/s Fascinating. It's not possible to actually see any FAT optimizations here (I would be surprised if this card did that), but the numbers for each of the columns are about the same as on my expensive Intel X25 SSD. What is obvious here is that 64 KB is the minimum size required to get the full performance. Arnd

15 years, 6 months

Kingston class 4 microSDHC 4GB (authentic)

by Arnd Bergmann

==> /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@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@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

15 years, 6 months

Sandisk Extreme III (2007)

by Arnd Bergmann

==> /sys/block/mmcblk0/device/block <== head: error reading `/sys/block/mmcblk0/device/block': Is a directory ==> /sys/block/mmcblk0/device/cid <== 03534453443034478030cd99b2007600 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900001e5c7f800a404000 ==> /sys/block/mmcblk0/device/date <== 06/2007 ==> /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 <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x8 ==> /sys/block/mmcblk0/device/manfid <== 0x000003 ==> /sys/block/mmcblk0/device/name <== SD04G ==> /sys/block/mmcblk0/device/oemid <== 0x5344 ==> /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 <== 0235000000000000 ==> /sys/block/mmcblk0/device/serial <== 0x30cd99b2 ==> /sys/block/mmcblk0/device/subsystem <== head: error reading `/sys/block/mmcblk0/device/subsystem': Is a directory ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SD04G MODALIAS=mmc:block $ sudo ./flashbench -a /dev/mmcblk0 --blocksize 1024 align 805306368 pre 781µs on 816µs post 639µs diff 106µs align 536870912 pre 783µs on 836µs post 662µs diff 113µs align 402653184 pre 823µs on 857µs post 665µs diff 113µs align 268435456 pre 831µs on 867µs post 659µs diff 122µs align 201326592 pre 768µs on 806µs post 609µs diff 117µs align 134217728 pre 833µs on 868µs post 663µs diff 120µs align 100663296 pre 777µs on 806µs post 611µs diff 111µs align 67108864 pre 722µs on 785µs post 592µs diff 128µs align 50331648 pre 706µs on 782µs post 671µs diff 93.7µs align 33554432 pre 744µs on 797µs post 576µs diff 136µs align 25165824 pre 554µs on 649µs post 572µs diff 85.3µs align 16777216 pre 637µs on 681µs post 567µs diff 79.4µs align 12582912 pre 648µs on 677µs post 581µs diff 62.2µs align 8388608 pre 650µs on 678µs post 582µs diff 61.8µs align 6291456 pre 714µs on 747µs post 586µs diff 96.7µs align 4194304 pre 729µs on 772µs post 662µs diff 76.5µs align 3145728 pre 650µs on 684µs post 586µs diff 65.4µs align 2097152 pre 720µs on 747µs post 582µs diff 95.8µs align 1572864 pre 731µs on 745µs post 669µs diff 45.3µs align 1048576 pre 781µs on 837µs post 658µs diff 117µs align 786432 pre 690µs on 692µs post 671µs diff 11.1µs align 524288 pre 732µs on 745µs post 666µs diff 45.7µs align 393216 pre 704µs on 686µs post 673µs diff -1998ns align 262144 pre 694µs on 689µs post 671µs diff 6.82µs align 196608 pre 701µs on 687µs post 674µs diff -594ns align 131072 pre 690µs on 685µs post 670µs diff 5.34µs align 98304 pre 702µs on 690µs post 670µs diff 4.34µs align 65536 pre 704µs on 685µs post 670µs diff -2468ns align 49152 pre 685µs on 697µs post 658µs diff 25.7µs align 32768 pre 701µs on 688µs post 671µs diff 2.15µs align 24576 pre 604µs on 679µs post 675µs diff 39.4µs align 16384 pre 694µs on 691µs post 656µs diff 15.7µs align 12288 pre 651µs on 656µs post 642µs diff 9.39µs align 8192 pre 625µs on 669µs post 671µs diff 21µs align 6144 pre 641µs on 626µs post 632µs diff -10210n sudo ./flashbench --open-au --erasesize=$[2*512*1024] --blocksize=8192 /dev/mmcblk0 --open-au-nr=3 --random 1MiB 8.38M/s 512KiB 8.38M/s 256KiB 7.01M/s 128KiB 7.06M/s 64KiB 6.93M/s 32KiB 5.54M/s 16KiB 5.42M/s 8KiB 2.26M/s --blocksize=8192 /dev/mmcblk0 --open-au-nr=3 --random 1MiB 6.85M/s 512KiB 8.35M/s 256KiB 8.37M/s 128KiB 7.01M/s 64KiB 7.01M/s 32KiB 6.67M/s 16KiB 5.43M/s 8KiB 2.26M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*1024] --blocksize=8192 /dev/mmcblk0 --open-au-nr=4 --random 1MiB 7.89M/s 512KiB 9.3M/s 256KiB 7.98M/s 128KiB 4.76M/s 64KiB 3.55M/s ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*1024] --blocksize=8192 /dev/mmcblk0 --open-au-nr=4 --random 1MiB 7.98M/s 512KiB 8.01M/s 256KiB 7.04M/s 128KiB 5.2M/s 64KiB 3.38M/s 32KiB 1.95M/s 16KiB 1.01M/s 8KiB 498K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*1024] --blocksize=8192 /dev/mmcblk0 --open-au-nr=7 1MiB 12M/s 512KiB 10.7M/s 256KiB 10.6M/s 128KiB 10.6M/s 64KiB 10.6M/s 32KiB 12M/s 16KiB 8.91M/s 8KiB 6.15M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*1024] --blocksize=8192 /dev/mmcblk0 --open-au-nr=10 1MiB 12.3M/s 512KiB 6.71M/s 256KiB 3.46M/s 128KiB 1.68M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=$[1024*1024] --blocksize=512 /dev/mmcblk0 --open-au-nr=7 1MiB 8.21M/s 512KiB 10.5M/s 256KiB 10.4M/s 128KiB 10.4M/s 64KiB 10.5M/s 32KiB 11.7M/s 16KiB 8.93M/s 8KiB 6.1M/s 4KiB 3.32M/s 2KiB 1.62M/s

15 years, 6 months

Results for Sandisk class 4 "SDHC card"

by Sascha Silbe

sascha.silbe@flatty:~$ find /sys/block/mmcblk0/device/ -maxdepth 1 -type f -printf '\n%f:\n' -exec cat \{\} \; uevent: DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SD04G MODALIAS=mmc:block cid: 0353445344303447800218eb1900a900 csd: 400e00325b5900001d8a7f800a404000 scr: 0235800000000000 date: 09/2010 fwrev: 0x0 hwrev: 0x8 manfid: 0x000003 name: SD04G oemid: 0x5344 serial: 0x0218eb19 type: SD Size: 3965190144B = 3872256 KiB flashtest@flatty:~/flashbench$ ./flashbench -a /dev/mmcblk0 --blocksize=1024 --count=1000 align 1073741824 pre 3.05ms on 3.83ms post 3.03ms diff 791µs align 536870912 pre 2.92ms on 3.79ms post 2.97ms diff 840µs align 268435456 pre 2.93ms on 3.85ms post 3.03ms diff 871µs align 134217728 pre 2.91ms on 3.78ms post 2.97ms diff 839µs align 67108864 pre 2.94ms on 3.84ms post 3.04ms diff 855µs align 33554432 pre 2.88ms on 3.78ms post 2.97ms diff 853µs align 16777216 pre 2.94ms on 3.85ms post 3.03ms diff 862µs align 8388608 pre 2.62ms on 3.5ms post 2.66ms diff 858µs align 4194304 pre 2.61ms on 3.49ms post 2.65ms diff 857µs align 2097152 pre 2.61ms on 3.51ms post 2.66ms diff 868µs align 1048576 pre 2.62ms on 3.5ms post 2.66ms diff 862µs align 524288 pre 2.63ms on 3.51ms post 2.67ms diff 859µs align 262144 pre 2.66ms on 2.94ms post 2.67ms diff 280µs align 131072 pre 2.66ms on 2.94ms post 2.66ms diff 281µs align 65536 pre 2.67ms on 2.97ms post 2.67ms diff 300µs align 32768 pre 2.66ms on 2.96ms post 2.67ms diff 293µs align 16384 pre 2.7ms on 2.95ms post 2.67ms diff 264µs align 8192 pre 2.69ms on 2.95ms post 2.67ms diff 272µs align 4096 pre 2.66ms on 2.71ms post 2.66ms diff 52.5µs align 2048 pre 2.67ms on 2.67ms post 2.67ms diff 2.51µs Trying to determine max. number of open AUs in non-random mode, 5 samples each: EBS=524288 ; for NUMAU in $(seq 1 10) ; do echo "Trying $NUMAU open AUs:" ; ./flashbench --open-au --open-au-nr=$NUMAU --erasesize=$EBS /dev/mmcblk0 |tr -s ' ' |tr ' ' '\t' > out.1 ; for nr in $(seq 2 5) ; do ./flashbench --open-au --open-au-nr=$NUMAU --erasesize=$EBS /dev/mmcblk0 |tr -s ' '|cut -d ' ' -f 2 > out.$nr ; done ; paste out.* ; done Trying 1 open AUs: 512KiB 5.95M/s 4.96M/s 4.99M/s 4.92M/s 5M/s 256KiB 6.47M/s 4.25M/s 5.15M/s 4.63M/s 3.21M/s 128KiB 6.48M/s 4.99M/s 4.83M/s 4.83M/s 3.34M/s 64KiB 6.5M/s 5.5M/s 4.95M/s 4.95M/s 3.19M/s 32KiB 6.13M/s 5.38M/s 5.01M/s 5.06M/s 3.85M/s 16KiB 5.35M/s 5.32M/s 5.29M/s 5.34M/s 3.35M/s Trying 2 open AUs: 512KiB 4.6M/s 4.06M/s 1.64M/s 4.68M/s 4.4M/s 256KiB 4.4M/s 3.71M/s 4.32M/s 3.7M/s 4.24M/s 128KiB 3.71M/s 4.03M/s 4M/s 3.65M/s 4.19M/s 64KiB 3.89M/s 4.14M/s 4.07M/s 3.63M/s 4.45M/s 32KiB 4.38M/s 4.01M/s 3.92M/s 4.34M/s 3.81M/s 16KiB 3.25M/s 2.7M/s 3.68M/s 3.05M/s 3.72M/s Trying 3 open AUs: 512KiB 4.56M/s 4.68M/s 4.36M/s 4.48M/s 4.13M/s 256KiB 4.37M/s 4.39M/s 4.18M/s 3.8M/s 3.99M/s 128KiB 4.3M/s 4.12M/s 4.16M/s 3.72M/s 2.3M/s 64KiB 5.33M/s 4.21M/s 4.82M/s 4.28M/s 4.7M/s 32KiB 3.82M/s 4.14M/s 3.8M/s 3.7M/s 4.2M/s 16KiB 3.38M/s 3.15M/s 3.52M/s 3.45M/s 3.19M/s Trying 4 open AUs: 512KiB 4.48M/s 3.86M/s 4.72M/s 4.43M/s 4.25M/s 256KiB 4.29M/s 2.84M/s 3.64M/s 3.85M/s 3.6M/s 128KiB 4.54M/s 1.69M/s 1.47M/s 4.06M/s 2.41M/s 64KiB 4.58M/s 4.2M/s 4.74M/s 1.93M/s 4.55M/s 32KiB 4.11M/s 4.03M/s 3.71M/s 4.5M/s 1.46M/s 16KiB 3.32M/s 2.64M/s 2.14M/s 3.2M/s 3.13M/s Trying 5 open AUs: 512KiB 4.19M/s 1.4M/s 4.26M/s 4.21M/s 4.53M/s 256KiB 4.35M/s 4.31M/s 2.07M/s 1.92M/s 3.85M/s 128KiB 4.8M/s 4.65M/s 4.55M/s 3.71M/s 3.89M/s 64KiB 3.54M/s 4.2M/s 4.05M/s 4.33M/s 4.48M/s 32KiB 1.87M/s 3.95M/s 4.07M/s 3.91M/s 3.85M/s 16KiB 2.71M/s 2.63M/s 1.7M/s 1.17M/s 873K/s Trying 6 open AUs: 512KiB 4.31M/s 4.02M/s 3.91M/s 4.03M/s 4.51M/s 256KiB 4.13M/s 3.87M/s 3.92M/s 3.97M/s 3.99M/s 128KiB 4.1M/s 4.24M/s 4.13M/s 4.09M/s 4.06M/s 64KiB 4.25M/s 4.52M/s 4.47M/s 4.09M/s 4.13M/s 32KiB 4.03M/s 4.09M/s 2.41M/s 4.13M/s 4.4M/s 16KiB 879K/s 1.11M/s 826K/s 889K/s 1.06M/s Trying 7 open AUs: 512KiB 4.19M/s 4.06M/s 4.11M/s 4.11M/s 4.18M/s 256KiB 4.04M/s 4.38M/s 4.39M/s 4.03M/s 4M/s 128KiB 4.35M/s 4.39M/s 4.49M/s 4.18M/s 4.2M/s 64KiB 4.17M/s 3.87M/s 4.17M/s 3.84M/s 4.17M/s 32KiB 1.15M/s 1M/s 3.82M/s 1.76M/s 1.03M/s 16KiB 1.54M/s 1.44M/s 868K/s 1.29M/s 1.99M/s Trying 8 open AUs: 512KiB 4.14M/s 4.24M/s 4.33M/s 4.41M/s 4.2M/s 256KiB 4.03M/s 4.12M/s 4.14M/s 3.07M/s 4.04M/s 128KiB 4.28M/s 4.33M/s 3.89M/s 2.19M/s 4.46M/s 64KiB 2.07M/s 1.05M/s 1.49M/s 1.53M/s 1.91M/s 32KiB 1.24M/s 3.85M/s 1.01M/s 2.17M/s 1.56M/s 16KiB 1.59M/s 1.67M/s 3.3M/s 1.03M/s 1.36M/s Trying 9 open AUs: 512KiB 4.15M/s 4.19M/s 4.06M/s 3.34M/s 4.07M/s 256KiB 4.07M/s 4.19M/s 4.02M/s 4.09M/s 3.97M/s 128KiB 2.55M/s 1.59M/s 4.38M/s 2.62M/s 2.78M/s 64KiB 1.42M/s 2.97M/s 2.88M/s 1.72M/s 2.72M/s 32KiB 1.46M/s 1.05M/s 995K/s 1.42M/s 1.13M/s 16KiB 3.3M/s 1.27M/s 1.98M/s 1.73M/s 1.54M/s Trying 10 open AUs: 512KiB 4.18M/s 3.57M/s 4.04M/s 4.07M/s 4.15M/s 256KiB 4.18M/s 4.15M/s 3.9M/s 4.1M/s 4.16M/s 128KiB 3.53M/s 2.73M/s 2.48M/s 2.38M/s 3.05M/s 64KiB 1.66M/s 1.72M/s 2.6M/s 2.09M/s 2.63M/s 32KiB 2.71M/s 1.22M/s 1.37M/s 1.19M/s 977K/s 16KiB 906K/s 1.39M/s 1.21M/s 1.44M/s 1.55M/s Trying to determine max. number of open AUs in random mode, 5 samples each: EBS=524288 ; for NUMAU in $(seq 1 10) ; do echo "Trying $NUMAU open AUs:" ; ./flashbench --open-au --random --open-au-nr=$NUMAU --erasesize=$EBS /dev/mmcblk0 |tr -s ' ' |tr ' ' '\t' > out.1 ; for nr in $(seq 2 5) ; do ./flashbench --open-au --random --open-au-nr=$NUMAU --erasesize=$EBS /dev/mmcblk0 |tr -s ' '|cut -d ' ' -f 2 > out.$nr ; done ; paste out.* ; done Trying 1 open AUs: 512KiB 6.03M/s 4.23M/s 3.99M/s 3.82M/s 4.49M/s 256KiB 6.47M/s 3.83M/s 3.74M/s 3.61M/s 4.14M/s 128KiB 6.48M/s 3.69M/s 3.51M/s 3.62M/s 3.56M/s 64KiB 6.46M/s 3.36M/s 3.14M/s 3.54M/s 3.33M/s 32KiB 5.95M/s 3.94M/s 3.87M/s 3.76M/s 3.76M/s 16KiB 5.15M/s 3.77M/s 2.68M/s 3.8M/s 3.72M/s Trying 2 open AUs: 512KiB 4.58M/s 4.7M/s 4.58M/s 5.04M/s 4.56M/s 256KiB 4.39M/s 3.98M/s 4.19M/s 4.08M/s 4.3M/s 128KiB 4.07M/s 4.14M/s 4.1M/s 3.99M/s 3.47M/s 64KiB 3.44M/s 4.55M/s 3.43M/s 4.05M/s 3.67M/s 32KiB 4.42M/s 4.34M/s 4.38M/s 3.85M/s 4.39M/s 16KiB 3.33M/s 3.44M/s 3.28M/s 3.28M/s 3.3M/s Trying 3 open AUs: 512KiB 3.89M/s 4.2M/s 3.93M/s 4.17M/s 4.43M/s 256KiB 4.59M/s 3.86M/s 3.89M/s 4.07M/s 4.09M/s 128KiB 4.07M/s 4.17M/s 3.71M/s 4.15M/s 4.17M/s 64KiB 3.5M/s 4.81M/s 3.86M/s 4.7M/s 4.64M/s 32KiB 1.05M/s 3.92M/s 4.23M/s 4.2M/s 3.96M/s 16KiB 3.35M/s 3.46M/s 3.15M/s 3.19M/s 3.44M/s Trying 4 open AUs: 512KiB 3.99M/s 3.88M/s 4.13M/s 4.1M/s 2.56M/s 256KiB 4.53M/s 2.87M/s 4M/s 3.8M/s 4.29M/s 128KiB 4.44M/s 4.04M/s 3.11M/s 4.29M/s 4.19M/s 64KiB 4.92M/s 1.45M/s 4.85M/s 3.24M/s 3.58M/s 32KiB 3.89M/s 4.01M/s 1.44M/s 1.56M/s 4.44M/s 16KiB 3.42M/s 3.36M/s 3.4M/s 3.35M/s 2.61M/s Trying 5 open AUs: 512KiB 3.97M/s 2.08M/s 1.5M/s 3.9M/s 4.03M/s 256KiB 2.45M/s 2.96M/s 4.5M/s 2.28M/s 1.66M/s 128KiB 4.26M/s 4.39M/s 4.56M/s 1.45M/s 2.16M/s 64KiB 3.46M/s 3.88M/s 4.42M/s 4.74M/s 4.21M/s 32KiB 2.28M/s 3.19M/s 4.27M/s 4.46M/s 3.77M/s 16KiB 2.06M/s 1.81M/s 3.26M/s 3.34M/s 2.69M/s Trying 6 open AUs: 512KiB 4.23M/s 3.91M/s 4.05M/s 4.46M/s 4.2M/s 256KiB 1.65M/s 3.89M/s 4.51M/s 4.29M/s 3.98M/s 128KiB 4.29M/s 4.27M/s 4.27M/s 4.31M/s 4.09M/s 64KiB 2.13M/s 4.38M/s 4.13M/s 4.11M/s 4.28M/s 32KiB 3.82M/s 3.84M/s 3.96M/s 4.33M/s 1.78M/s 16KiB 1.07M/s 646K/s 975K/s 1.13M/s 1.17M/s Trying 7 open AUs: 512KiB 4.19M/s 4.29M/s 4.39M/s 4.13M/s 4.03M/s 256KiB 3.97M/s 3.98M/s 4.08M/s 4.23M/s 4.13M/s 128KiB 4.14M/s 4.31M/s 4.37M/s 4.54M/s 4.25M/s 64KiB 4.35M/s 4.4M/s 4.27M/s 4.58M/s 3.18M/s 32KiB 3.09M/s 1.44M/s 2.32M/s 1.12M/s 1.04M/s 16KiB 1.03M/s 966K/s 787K/s 1.84M/s 3.23M/s Trying 8 open AUs: 512KiB 4.33M/s 3.81M/s 4.02M/s 3.99M/s 4.02M/s 256KiB 4.08M/s 4.13M/s 4.06M/s 4.03M/s 3.87M/s 128KiB 4.35M/s 4.33M/s 4.69M/s 4.31M/s 1.85M/s 64KiB 2.83M/s 1.52M/s 1.38M/s 2.55M/s 3.81M/s 32KiB 1.54M/s 3.25M/s 1.7M/s 1.01M/s 1.43M/s 16KiB 883K/s 1.29M/s 1.04M/s 1.7M/s 1.21M/s Trying 9 open AUs: 512KiB 3.92M/s 2.78M/s 4.01M/s 4.01M/s 3.7M/s 256KiB 4.13M/s 3.77M/s 4.11M/s 4.04M/s 4.05M/s 128KiB 4.31M/s 3.25M/s 1.88M/s 4.4M/s 2.81M/s 64KiB 4.42M/s 1.8M/s 2.05M/s 2.8M/s 1.84M/s 32KiB 1.51M/s 1.46M/s 1.37M/s 1.2M/s 1.32M/s 16KiB 1.24M/s 1.68M/s 1.31M/s 1.71M/s 1.46M/s Trying 10 open AUs: 512KiB 4.03M/s 4.4M/s 4.08M/s 4.22M/s 4.14M/s 256KiB 3.98M/s 3.79M/s 3.93M/s 4M/s 4.07M/s 128KiB 3M/s 1.71M/s 4.23M/s 4.04M/s 1.62M/s 64KiB 2.87M/s 1.99M/s 2.01M/s 1.89M/s 3.44M/s 32KiB 1.02M/s 1.01M/s 1.23M/s 1.75M/s 1.17M/s 16KiB 1.67M/s 972K/s 1.11M/s 970K/s 1.58M/s flashtest@flatty:~/flashbench$ ./flashbench --findfat --random --erasesize=524288 /dev/mmcblk0 512KiB 5.33M/s 6.24M/s 6.23M/s 6.24M/s 6.23M/s 6.23M/s 256KiB 6.21M/s 6.23M/s 6.22M/s 6.25M/s 6.25M/s 6.08M/s 128KiB 6.23M/s 6.25M/s 6.25M/s 6.26M/s 6M/s 5.75M/s 64KiB 6.02M/s 6.04M/s 6.15M/s 4M/s 4.01M/s 4.5M/s 32KiB 5.2M/s 5.9M/s 5.9M/s 5.88M/s 5.91M/s 5.91M/s 16KiB 5.2M/s 5.2M/s 5.19M/s 5.17M/s 5.21M/s 5.19M/s flashtest@flatty:~/flashbench$ I hope you can read more into that data than I do. I have a feeling 5 samples are not enough to reliably determine the number of open AUs for this card. Sascha -- http://sascha.silbe.org/ http://www.infra-silbe.de/

15 years, 6 months

intel x25 SSD

by Arnd Bergmann

# need to disable write cache for meaningful tests $ sudo hdparm -W0 /dev/sdb /dev/sdb: setting drive write-caching to 0 (off) # erase size is 10 MB apparently, need a large count to get meaningful data $ sudo ./flashbench -a --blocksize=10240 /dev/sdb7 --count=1000 align 2013265920 pre 76.5µs on 77.4µs post 74.8µs diff 1.77µs align 1342177280 pre 61.1µs on 62.2µs post 61.3µs diff 989ns align 1006632960 pre 73.8µs on 74.9µs post 73.6µs diff 1.22µs align 671088640 pre 73.7µs on 74.8µs post 73.6µs diff 1.16µs align 503316480 pre 88.7µs on 89.8µs post 86.9µs diff 1.98µs align 335544320 pre 88.9µs on 90.8µs post 87µs diff 2.79µs align 251658240 pre 91.5µs on 92.7µs post 88.2µs diff 2.85µs align 167772160 pre 91.6µs on 92.7µs post 88µs diff 2.87µs align 125829120 pre 91.6µs on 92.5µs post 88µs diff 2.71µs align 83886080 pre 92µs on 92.9µs post 88.2µs diff 2.82µs align 62914560 pre 91.6µs on 92.6µs post 88.3µs diff 2.71µs align 41943040 pre 92.1µs on 92.7µs post 88.5µs diff 2.41µs align 31457280 pre 92µs on 92.9µs post 88.2µs diff 2.78µs align 20971520 pre 92.1µs on 92.9µs post 88.4µs diff 2.65µs align 15728640 pre 92.1µs on 92.1µs post 88.4µs diff 1.85µs align 10485760 pre 92.5µs on 93µs post 88.3µs diff 2.64µs align 7864320 pre 91.7µs on 91.8µs post 88.3µs diff 1.75µs align 5242880 pre 91.7µs on 91.8µs post 88.5µs diff 1.67µs align 3932160 pre 90µs on 89.2µs post 87.2µs diff 611ns align 2621440 pre 89.9µs on 89.1µs post 87.1µs diff 625ns align 1966080 pre 89.7µs on 89.2µs post 87.1µs diff 786ns align 1310720 pre 89.9µs on 89.2µs post 87.1µs diff 685ns align 983040 pre 90.1µs on 89.2µs post 87.2µs diff 489ns align 655360 pre 89.7µs on 88.9µs post 87µs diff 605ns align 491520 pre 89µs on 88.8µs post 86.9µs diff 827ns align 327680 pre 89.5µs on 89.1µs post 86.9µs diff 866ns align 245760 pre 92µs on 91.6µs post 88.4µs diff 1.44µs align 163840 pre 89.5µs on 89.1µs post 87.3µs diff 668ns align 122880 pre 89.2µs on 89.1µs post 87.1µs diff 923ns align 81920 pre 86.4µs on 86.5µs post 85.7µs diff 430ns align 61440 pre 86.1µs on 86µs post 85.9µs diff 1ns align 40960 pre 86.8µs on 86.6µs post 85.8µs diff 265ns align 30720 pre 85.5µs on 85.5µs post 87.3µs diff -866ns align 20480 pre 86.1µs on 86.1µs post 85.4µs diff 284ns # page size is 32 KB $ sudo ./flashbench --open-au --open-au-nr=5 /dev/sdb7 --blocksize=512 --erasesize=$[1024 * 1024] 1MiB 75.8M/s 512KiB 80.4M/s 256KiB 67.5M/s 128KiB 59M/s 64KiB 43.4M/s 32KiB 28M/s 16KiB 15.5M/s 8KiB 8.48M/s 4KiB 4.25M/s 2KiB 2.18M/s 1KiB 1.1M/s 512B 553K/s # similar numbers for using 10 MB: $ sudo ./flashbench --open-au --open-au-nr=1 /dev/sdb7 --blocksize=5120 --erasesize=$[10240 * 1024] 10MiB 70.9M/s 5MiB 73.8M/s 2.5MiB 76.8M/s 1.25MiB 77M/s 640KiB 71.9M/s 320KiB 80.5M/s 160KiB 60M/s 80KiB 54.5M/s 40KiB 36.5M/s 20KiB 19.6M/s 10KiB 9.92M/s 5KiB 5.28M/s #trying larger number of open au: $ sudo ./flashbench --open-au /dev/sdb7 --blocksize=$[5120 * 8] --erasesize=$[10240 * 1024] --open-au-nr=2 10MiB 76.5M/s 5MiB 78M/s 2.5MiB 77.8M/s 1.25MiB 73.9M/s 640KiB 70.1M/s 320KiB 63.9M/s 160KiB 56.3M/s 80KiB 53.2M/s 40KiB 33M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au /dev/sdb7 --blocksize=$[5120 * 8] --erasesize=$[10240 * 1024] --open-au-nr=3 10MiB 79.1M/s 5MiB 79.1M/s 2.5MiB 79M/s 1.25MiB 73.2M/s 640KiB 68.6M/s 320KiB 63M/s 160KiB 60M/s 80KiB 54.6M/s 40KiB 33.1M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au /dev/sdb7 --blocksize=$[5120 * 8] --erasesize=$[10240 * 1024] --open-au-nr=4 10MiB 76.4M/s 5MiB 76.9M/s 2.5MiB 76.5M/s 1.25MiB 46.1M/s 640KiB 56.4M/s 320KiB 51M/s 160KiB 43.5M/s 80KiB 53.9M/s 40KiB 26.5M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au /dev/sdb7 --blocksize=$[5120 * 8] --erasesize=$[10240 * 1024] --open-au-nr=4 10MiB 78.4M/s 5MiB 78.5M/s 2.5MiB 54.5M/s 1.25MiB 58M/s 640KiB 54.7M/s 320KiB 44.7M/s 160KiB 44.4M/s 80KiB 41.1M/s 40KiB 30.5M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au /dev/sdb7 --blocksize=$[5120 * 8] --erasesize=$[10240 * 1024] --open-au-nr=4 10MiB 24.1M/s 5MiB 44.2M/s 2.5MiB 77.6M/s 1.25MiB 73.9M/s 640KiB 74.2M/s 320KiB 80.5M/s 160KiB 63.1M/s 80KiB 54.3M/s 40KiB 36.3M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au /dev/sdb7 --blocksize=$[5120 * 16] --erasesize=$[10240 * 1024] --open-au-nr=60 10MiB 64.4M/s 5MiB 70.2M/s 2.5MiB 78.4M/s 1.25MiB 71M/s 640KiB 60.4M/s 320KiB 69.9M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au /dev/sdb7 --blocksize=$[5120 * 16] --erasesize=$[10240 * 1024] --open-au-nr=130 10MiB 72.5M/s 5MiB 73.5M/s 2.5MiB 73.1M/s 1.25MiB 69M/s 640KiB 68.2M/s 320KiB 69.1M/s 160KiB 58.5M/s Absolutely no effects can be measured based on number of open erase blocks. Arnd

15 years, 7 months

Patriot Rage XT 16 GB (inconclusive)

by Arnd Bergmann

$ lsusb Bus 001 Device 024: ID 13fe:3800 Kingston Technology Company Inc. # The device can access 12 12 MB erase blocks: arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/sdc --open-au --blocksize=$[3 * 8192] --erasesize=$[3 * 4096 * 1024] --open-au-nr=20 12MiB 12.9M/s 6MiB 10.8M/s 3MiB 7.49M/s 1.5MiB 4.66M/s ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/sdc --open-au --blocksize=$[3 * 8192] --erasesize=$[3 * 4096 * 1024] --open-au-nr=12 12MiB 10.2M/s 6MiB 13.8M/s 3MiB 13.5M/s 1.5MiB 13.2M/s 768KiB 13.1M/s 384KiB 12.8M/s 192KiB 12.7M/s 96KiB 15.3M/s ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/sdc --open-au --blocksize=$[3 * 8192] --erasesize=$[3 * 4096 * 1024] --open-au-nr=16 12MiB 14.2M/s 6MiB 11M/s 3MiB 7.64M/s 1.5MiB 4.78M/s 768KiB 2.69M/s 384KiB 1.45M/s 192KiB 767K/s ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/sdc --open-au --blocksize=$[3 * 8192] --erasesize=$[3 * 4096 * 1024] --open-au-nr=13 12MiB 12.9M/s 6MiB 11.5M/s 3MiB 8.35M/s 1.5MiB 5.13M/s 768KiB 2.89M/s 384KiB 1.54M/s 192KiB 758K/s 96KiB 732K/s ^C arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/sdc --open-au --blocksize=$[3 * 8192] --erasesize=$[3 * 4096 * 1024] --open-au-nr=12 [sudo] password for arnd: 12MiB 16.2M/s 6MiB 13.2M/s 3MiB 13M/s 1.5MiB 13M/s 768KiB 13.1M/s 384KiB 12.5M/s 192KiB 12.5M/s 96KiB 14.9M/s 48KiB 9.55M/s # This also works with 8 MB units (properly aligned to 24 MB by modifying flashbench): $ sudo ./flashbench /dev/sdc --open-au --blocksize=$[2 * 8192] --erasesize=$[ 2 * 4096 * 1024] --open-au-nr=12 8MiB 12.8M/s 4MiB 11.8M/s 2MiB 10.3M/s 1MiB 16.6M/s 512KiB 17M/s 256KiB 15.6M/s 128KiB 13.6M/s 64KiB 18.4M/s 32KiB 11.9M/s 16KiB 3.41M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench /dev/sdc --open-au --blocksize=$[2 * 8192] --erasesize=$[ 2 * 4096 * 1024] --open-au-nr=13 8MiB 16.4M/s 4MiB 16.6M/s 2MiB 14.4M/s 1MiB 13.1M/s 512KiB 10.4M/s 256KiB 6.55M/s 128KiB 3.87M/s ^C $ sudo ./flashbench /dev/sdc --open-au --blocksize=$[2 * 8192] --erasesize=$[4 * 4096 * 1024] --open-au-nr=12 16MiB 13.4M/s 8MiB 13.4M/s 4MiB 11.6M/s 2MiB 14.4M/s 1MiB 16.4M/s 512KiB 16.8M/s 256KiB 15M/s The results are still not conlusive, especially after doing more tests with --random. Will have to revisit.

15 years, 7 months

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

Flashbench-results