Flashbench-results

flashbench-results@lists.linaro.org

174 discussions

Transcend Ultimate 32GB Class 10 microSDHC TS32GUSDHC10

by Victor

Hi! I've started using that great tool to figure out how I should partition some cards but I'm not sure how to continue after the first results I've got and I'd like some guidance. Also I'd like to know if the card reader can influence the results since I've tested with 2 different laptops internal SD card readers and noticed differences in the times. I also checked with 'dd' the speeds and found the writing speed limited up to less than 10 MiB/s and a reading speed limited up to 14 MiB/s or so with chunks of 32 kiB and 4 MiB. Eventually I checked on an Android phone and got the writing speed limited up to 11 MiB/s or so and the reading speed limited up to less than 20 MiB/s. To make sure I compiled flashbench to run on the phone and also found different times than on the laptops. # # Product Page # http://www.transcend-info.com/products/Catlist.asp?LangNo=0&modno=320 # # Details # $ head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 1b534d30303030301078944a9000c100 ==> /sys/block/mmcblk0/device/csd <== 400e00325b590000e9e57f800a404000 ==> /sys/block/mmcblk0/device/date <== 01/2012 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/manfid <== 0x00001b ==> /sys/block/mmcblk0/device/name <== 00000 ==> /sys/block/mmcblk0/device/oemid <== 0x534d ## i.e. "SM" ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 02b5800200000000 ==> /sys/block/mmcblk0/device/serial <== 0x78944a90 ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=00000 MODALIAS=mmc:block # # Size # $ cat /sys/block/mmcblk0/device/block/mmcblk0/size 61315072 # # Factor # $ factor 61315072 61315072: 2 2 2 2 2 2 2 2 2 2 2 7 7 13 47 Does it mean that the erase block size could be 7 MiB? # # Guess erase block and page sizes # ## on Dell E6400 $ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 align 8589934592 pre 198µs on 210µs post 199µs diff 11.3µs align 4294967296 pre 185µs on 202µs post 187µs diff 15.6µs align 2147483648 pre 184µs on 197µs post 184µs diff 12.9µs align 1073741824 pre 187µs on 202µs post 187µs diff 15.7µs align 536870912 pre 184µs on 197µs post 184µs diff 13.5µs align 268435456 pre 217µs on 234µs post 187µs diff 32.1µs align 134217728 pre 218µs on 247µs post 200µs diff 38.7µs align 67108864 pre 219µs on 251µs post 202µs diff 40.5µs align 33554432 pre 219µs on 267µs post 216µs diff 48.9µs align 16777216 pre 208µs on 256µs post 216µs diff 43.7µs align 8388608 pre 203µs on 242µs post 208µs diff 36.5µs align 4194304 pre 212µs on 260µs post 216µs diff 45.8µs align 2097152 pre 205µs on 242µs post 207µs diff 36.1µs align 1048576 pre 212µs on 257µs post 217µs diff 42.4µs align 524288 pre 203µs on 240µs post 206µs diff 36.1µs align 262144 pre 211µs on 257µs post 217µs diff 43.2µs align 131072 pre 205µs on 241µs post 207µs diff 35.5µs align 65536 pre 209µs on 257µs post 217µs diff 43.7µs align 32768 pre 201µs on 239µs post 207µs diff 35.3µs align 16384 pre 213µs on 235µs post 210µs diff 23.9µs ## align 8192 pre 211µs on 213µs post 214µs diff 868ns align 4096 pre 212µs on 212µs post 217µs diff -2843ns align 2048 pre 214µs on 212µs post 214µs diff -1985ns ## on Lenovo T400 $ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 align 8589934592 pre 307µs on 737µs post 358µs diff 405µs align 4294967296 pre 283µs on 724µs post 348µs diff 409µs align 2147483648 pre 300µs on 712µs post 371µs diff 377µs align 1073741824 pre 331µs on 857µs post 353µs diff 515µs align 536870912 pre 340µs on 872µs post 354µs diff 525µs align 268435456 pre 342µs on 843µs post 359µs diff 493µs align 134217728 pre 292µs on 839µs post 364µs diff 511µs align 67108864 pre 316µs on 843µs post 357µs diff 507µs align 33554432 pre 344µs on 832µs post 367µs diff 476µs align 16777216 pre 323µs on 862µs post 370µs diff 515µs align 8388608 pre 324µs on 855µs post 365µs diff 510µs align 4194304 pre 308µs on 772µs post 340µs diff 448µs align 2097152 pre 334µs on 861µs post 367µs diff 510µs align 1048576 pre 301µs on 794µs post 355µs diff 466µs align 524288 pre 325µs on 830µs post 352µs diff 492µs align 262144 pre 319µs on 795µs post 353µs diff 459µs align 131072 pre 314µs on 863µs post 389µs diff 511µs align 65536 pre 317µs on 813µs post 339µs diff 485µs align 32768 pre 311µs on 845µs post 364µs diff 507µs ## align 16384 pre 323µs on 464µs post 346µs diff 130µs ## align 8192 pre 331µs on 338µs post 330µs diff 7.52µs align 4096 pre 350µs on 357µs post 344µs diff 10.1µs align 2048 pre 359µs on 354µs post 352µs diff -1566ns ## on Samsung GT-I8150 # ./flashbench -a /dev/block/mmcblk1 --blocksize=1024 align 8589934592 pre 222µs on 318µs post 283µs diff 65.4µs align 4294967296 pre 227µs on 318µs post 279µs diff 65.4µs align 2147483648 pre 231µs on 318µs post 275µs diff 65.4µs align 1073741824 pre 279µs on 440µs post 405µs diff 98.1µs align 536870912 pre 231µs on 340µs post 371µs diff 39.2µs align 268435456 pre 240µs on 353µs post 288µs diff 89.4µs align 134217728 pre 253µs on 506µs post 344µs diff 207µs align 67108864 pre 231µs on 458µs post 292µs diff 196µs align 33554432 pre 257µs on 475µs post 305µs diff 194µs align 16777216 pre 235µs on 475µs post 318µs diff 198µs align 8388608 pre 218µs on 453µs post 310µs diff 190µs align 4194304 pre 248µs on 458µs post 296µs diff 185µs align 2097152 pre 231µs on 445µs post 296µs diff 181µs align 1048576 pre 244µs on 501µs post 327µs diff 216µs align 524288 pre 240µs on 449µs post 301µs diff 179µs align 262144 pre 231µs on 453µs post 310µs diff 183µs align 131072 pre 227µs on 453µs post 301µs diff 190µs align 65536 pre 253µs on 453µs post 310µs diff 172µs align 32768 pre 244µs on 453µs post 327µs diff 168µs ## align 16384 pre 253µs on 371µs post 318µs diff 85µs ## align 8192 pre 283µs on 257µs post 240µs diff -4359ns align 4096 pre 270µs on 262µs post 253µs diff 1ns align 2048 pre 275µs on 275µs post 275µs diff 0ns Should I understand that it has 16 kiB pages with multi-plane accesses to read two pages simultaneously? What do you suggest? How should I continue and with which device? Thanks and regards, Victor

14 years, 4 months

flashbench read test of Sandisk 16GB Extreme SDHC card

by Omega Weapon

As requested in the readme, I have used flashbench to test the card in the topic. Here are my results, taken by a Debian Wheezy install (Linux omega1 3.2.0-2-amd64 #1 SMP Mon Jun 11 17:24:18 UTC 2012 x86_64 GNU/Linux) on a Transcend 3.0 USB reader running through a USB2 port: sudo ./flashbench -a /dev/sdm --blocksize=1024 align 4294967296 pre 1.22ms on 1.42ms post 1.21ms diff 197µs align 2147483648 pre 1.21ms on 1.49ms post 1.04ms diff 367µs align 1073741824 pre 1.12ms on 1.41ms post 1.07ms diff 319µs align 536870912 pre 1.19ms on 1.44ms post 1.03ms diff 330µs align 268435456 pre 1.22ms on 1.44ms post 1.17ms diff 243µs align 134217728 pre 1.19ms on 1.46ms post 1.02ms diff 354µs align 67108864 pre 1.18ms on 1.44ms post 1.24ms diff 233µs align 33554432 pre 1.19ms on 1.4ms post 1.23ms diff 187µs align 16777216 pre 1.18ms on 1.43ms post 1.21ms diff 240µs align 8388608 pre 1.14ms on 1.46ms post 1.21ms diff 280µs align 4194304 pre 951µs on 1.12ms post 920µs diff 179µs align 2097152 pre 981µs on 1.07ms post 993µs diff 78.1µs align 1048576 pre 993µs on 1.09ms post 1.01ms diff 93.8µs align 524288 pre 996µs on 1.09ms post 1.01ms diff 86.5µs align 262144 pre 987µs on 1.09ms post 1ms diff 97.6µs align 131072 pre 977µs on 1.09ms post 1ms diff 102µs align 65536 pre 1.05ms on 1.1ms post 982µs diff 89.3µs align 32768 pre 1.03ms on 1.07ms post 1.07ms diff 24.7µs align 16384 pre 1.01ms on 1.08ms post 1.02ms diff 66.6µs align 8192 pre 1ms on 1.08ms post 1.01ms diff 68.3µs align 4096 pre 994µs on 1.07ms post 1.02ms diff 56.4µs align 2048 pre 1.02ms on 1.08ms post 1.02ms diff 58.7µs

14 years, 4 months

Sandisk Extreme 45MB/s 16GB UHS-1 SDHC

by Arnd Bergmann

==> /sys/block/mmcblk0/device/cid <== 03534453553136478000c1eec400c300 ==> /sys/block/mmcblk0/device/csd <== 400e00325b59000076b27f800a404000 ==> /sys/block/mmcblk0/device/date <== 03/2012 ==> /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 <== SU16G ==> /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 <== 0235800300000000 ==> /sys/block/mmcblk0/device/serial <== 0x00c1eec4 ==> /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=SU16G MODALIAS=mmc:block Disk /dev/mmcblk0: 15.9 GB, 15931539456 bytes 255 heads, 63 sectors/track, 1936 cylinders, total 31116288 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 8192 31116287 15554048 c W95 FAT32 (LBA) $ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 align 1610612736 pre 576µs on 683µs post 574µs diff 108µs align 1073741824 pre 574µs on 689µs post 568µs diff 118µs align 805306368 pre 578µs on 698µs post 575µs diff 121µs align 536870912 pre 570µs on 715µs post 564µs diff 148µs align 402653184 pre 578µs on 720µs post 573µs diff 145µs align 268435456 pre 573µs on 669µs post 568µs diff 97.9µs align 201326592 pre 582µs on 715µs post 577µs diff 135µs align 134217728 pre 581µs on 695µs post 576µs diff 116µs align 100663296 pre 570µs on 664µs post 565µs diff 96.5µs align 67108864 pre 572µs on 689µs post 569µs diff 118µs align 50331648 pre 568µs on 678µs post 569µs diff 109µs align 33554432 pre 581µs on 694µs post 578µs diff 114µs align 25165824 pre 549µs on 688µs post 562µs diff 132µs align 16777216 pre 569µs on 666µs post 554µs diff 105µs align 12582912 pre 579µs on 578µs post 576µs diff 618ns align 8388608 pre 574µs on 704µs post 569µs diff 133µs align 6291456 pre 573µs on 593µs post 572µs diff 20.7µs align 4194304 pre 581µs on 607µs post 571µs diff 30.5µs align 3145728 pre 571µs on 579µs post 576µs diff 5.44µs align 2097152 pre 580µs on 583µs post 580µs diff 3.2µs align 1572864 pre 574µs on 578µs post 575µs diff 3.63µs align 1048576 pre 582µs on 585µs post 579µs diff 4.77µs align 786432 pre 571µs on 577µs post 569µs diff 6.89µs align 524288 pre 573µs on 575µs post 572µs diff 2.2µs align 393216 pre 578µs on 581µs post 582µs diff 1.3µs align 262144 pre 574µs on 578µs post 570µs diff 6.3µs align 196608 pre 578µs on 578µs post 569µs diff 4.91µs align 131072 pre 572µs on 581µs post 574µs diff 7.64µs align 98304 pre 572µs on 574µs post 568µs diff 3.45µs align 65536 pre 571µs on 578µs post 567µs diff 9.32µs align 49152 pre 580µs on 579µs post 580µs diff -702ns align 32768 pre 569µs on 571µs post 568µs diff 1.98µs align 24576 pre 571µs on 569µs post 567µs diff -536ns align 16384 pre 568µs on 570µs post 570µs diff 696ns align 12288 pre 571µs on 569µs post 566µs diff 728ns align 8192 pre 566µs on 567µs post 569µs diff -846ns align 6144 pre 565µs on 566µs post 563µs diff 1.7µs align 4096 pre 573µs on 578µs post 574µs diff 4.31µs align 3072 pre 569µs on 568µs post 565µs diff 725ns align 2048 pre 572µs on 570µs post 573µs diff -2032ns $ sudo ./flashbench --open-au --erasesize=$[8*1024*1024] /dev/mmcblk0 --ocksize=1024 --open-au-nr=9 8MiB 11.9M/s 4MiB 11.9M/s 2MiB 11.8M/s 1MiB 11.8M/s 512KiB 11.8M/s 256KiB 11.7M/s 128KiB 11.5M/s 64KiB 11.2M/s 32KiB 8.73M/s 16KiB 6.07M/s 8KiB 3.54M/s 4KiB 2.08M/s 2KiB 1.01M/s 1KiB 517K/s sudo ./flashbench --open-au --erasesize=$[8*1024*1024] /dev/mmcblk0 --blocksize=1024 --open-au-nr=10 8MiB 11.9M/s 4MiB 9.3M/s 2MiB 5.01M/s 1MiB 2.69M/s $ sudo ./flashbench --open-au --erasesize=$[8*1024*1024] /dev/mmcblk0 --ocksize=1024 --open-au-nr=1 --random 8MiB 8.13M/s 4MiB 7.72M/s 2MiB 4.87M/s 1MiB 2.57M/s 512KiB 1.29M/s 256KiB 639K/s $ sudo ./flashbench --open-au --erasesize=$[8*1024*1024] /dev/mmcblk0 --ocksize=1024 --open-au-nr=1 --random 8MiB 8.13M/s 4MiB 7.72M/s 2MiB 4.87M/s 1MiB 2.57M/s 512KiB 1.29M/s 256KiB 639K/s 128KiB 602K/s 64KiB 513K/s 32KiB 2.44M/s 16KiB 3.39M/s 8KiB 1.75M/s 4KiB 893K/s 2KiB 425K/s 1KiB 222K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --findfat --erasesize=$[2*1024*1024] /dev/mmcblk0 --ocksize=4096 --fat-nr=8 --random 2MiB 11.7M/s 11.9M/s 6.45M/s 7.19M/s 11.9M/s 12M/s 12M/s 11.9M/s 1MiB 3.38M/s 2.4M/s 2.02M/s 3.55M/s 5.74M/s 2.21M/s 2.66M/s 2.42M/s 512KiB 1.32M/s 1.16M/s 1.55M/s 3.9M/s 1.2M/s 1.2M/s 1.2M/s 1.19M/s 256KiB 1.32M/s 536K/s 1.98M/s 3.66M/s 692K/s 534K/s 532K/s 533K/s 128KiB 1.08M/s 770K/s 1.56M/s 5.08M/s 698K/s 773K/s 666K/s 665K/s 64KiB 1.25M/s 582K/s 2.36M/s 3.41M/s 568K/s 586K/s 586K/s 586K/s 32KiB 1.58M/s 953K/s 2.42M/s 4.28M/s 1.02M/s 1.03M/s 961K/s 960K/s 16KiB 2.27M/s 3.32M/s 3.3M/s 4.84M/s 1.41M/s 1.61M/s 1.91M/s 1.91M/s 8KiB 1.72M/s 1.87M/s 2.19M/s 1.49M/s 2M/s 2.01M/s 1.86M/s 1.83M/s 4KiB 796K/s 960K/s 576K/s 758K/s 1.04M/s 863K/s 861K/s 1.07M/s

14 years, 4 months

Toshiba 8 GB microSDHC Class 4

by Arnd Bergmann

Very surprisingly, this card with a Toshiba controller actually has 3 writeable erase blocks, not just one, and supports random access. ==> /sys/block/mmcblk0/device/block <== head: error reading `/sys/block/mmcblk0/device/block': Is a directory ==> /sys/block/mmcblk0/device/cid <== 02544d53413038471028cc2d7f00c200 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900003a477f800a400000 ==> /sys/block/mmcblk0/device/date <== 02/2012 ==> /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 <== 0x1 ==> /sys/block/mmcblk0/device/manfid <== 0x000002 ==> /sys/block/mmcblk0/device/name <== SA08G ==> /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 <== 0x28cc2d7f ==> /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=SA08G MODALIAS=mmc:block ==> /proc/partitions <== 179 0 7639040 mmcblk0 179 1 7634944 mmcblk0p1 align 100663296 pre 545µs on 852µs post 734µs diff 213µs align 67108864 pre 545µs on 854µs post 734µs diff 215µs align 50331648 pre 543µs on 851µs post 732µs diff 213µs align 33554432 pre 543µs on 853µs post 735µs diff 214µs align 25165824 pre 545µs on 855µs post 733µs diff 217µs align 16777216 pre 547µs on 856µs post 740µs diff 212µs align 12582912 pre 543µs on 854µs post 736µs diff 214µs align 8388608 pre 542µs on 860µs post 751µs diff 214µs align 6291456 pre 541µs on 723µs post 731µs diff 86.7µs align 4194304 pre 550µs on 858µs post 741µs diff 213µs align 3145728 pre 545µs on 741µs post 732µs diff 103µs align 2097152 pre 529µs on 714µs post 718µs diff 89.9µs align 1572864 pre 529µs on 716µs post 720µs diff 91.5µs align 1048576 pre 545µs on 746µs post 733µs diff 107µs align 786432 pre 549µs on 748µs post 735µs diff 106µs align 524288 pre 548µs on 744µs post 732µs diff 104µs align 393216 pre 552µs on 748µs post 739µs diff 103µs align 262144 pre 548µs on 745µs post 741µs diff 101 align 196608 pre 549µs on 745µs post 738µs diff 101µs align 131072 pre 553µs on 749µs post 740µs diff 103µs align 98304 pre 546µs on 747µs post 735µs diff 107µs $ sudo ./flashbench --open-au /dev/mmcblk0 --blocksize=1024 --erasesize=$[8*1024*1024] 8MiB 4.96M/s 4MiB 5.02M/s 2MiB 5.31M/s 1MiB 5M/s 512KiB 5M/s 256KiB 5M/s 128KiB 4.98M/s 64KiB 4.96M/s 32KiB 4.89M/s 16KiB 3.74M/s 8KiB 2.42M/s 4KiB 1.46M/s 2KiB 809K/s 1KiB 431K/s $ sudo ./flashbench --open-au /dev/mmcblk0 --blocksize=8192 --erasesize=$[8*1024*1024] --open-au-nr=2 8MiB 5.54M/s 4MiB 5.01M/s 2MiB 5.03M/s 1MiB 5.03M/s 512KiB 5.01M/s 256KiB 5.02M/s 128KiB 5.01M/s 64KiB 4.96M/s 32KiB 4.9M/s 16KiB 3.82M/s 8KiB 2.42M/s $ sudo ./flashbench --open-au /dev/mmcblk0 --blocksize=8192 --erasesize=$[4*1024*1024] --open-au-nr=2 4MiB 4.15M/s 2MiB 4.64M/s 1MiB 4.61M/s 512KiB 4.65M/s 256KiB 4.65M/s 128KiB 4.65M/s 64KiB 4.6M/s 32KiB 4.44M/s 16KiB 3.39M/s 8KiB 2.24M/s $ sudo ./flashbench --open-au /dev/mmcblk0 --blocksize=8192 --erasesize=$[4*1024*1024] --open-au-nr=2 --offset=$[17*1024*1024] 4MiB 3.6M/s 2MiB 2.27M/s 1MiB 2.72M/s 512KiB 3.03M/s $ sudo ./flashbench --open-au /dev/mmcblk0 --blocksize=8192 --erasesize=$[4*1024*1024] --open-au-nr=2 --offset=$[18*1024*1024] 4MiB 2.21M/s 2MiB 2.1M/s 1MiB 1.98M/s $ sudo ./flashbench --open-au /dev/mmcblk0 --blocksize=8192 --erasesize=$[4*1024*1024] --open-au-nr=2 --random 4MiB 5.03M/s 2MiB 2.69M/s 1MiB 3.15M/s 512KiB 1.43M/s 256KiB 1.75M/s 128KiB 1.89M/s 64KiB 1.37M/s 32KiB 1.2M/s 16KiB 1.19M/s 8KiB 613K/s $ sudo ./flashbench --open-au /dev/mmcblk0 --blocksize=8192 --erasesize=$[4*1024*1024] --open-au-nr=4 4MiB 3.23M/s 2MiB 4.27M/s 1MiB 1.45M/s 512KiB 628K/s ^Carnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au /dev/mmcblk0 --blocksize=8192 --erasesize=$[4*1024*1024] --open-au-nr=3 4MiB 3M/s 2MiB 4.58M/s 1MiB 4.57M/s 512KiB 4.55M/s 256KiB 4.57M/s 128KiB 4.54M/s 64KiB 4.52M/s 32KiB 4.37M/s 16KiB 3.34M/s 8KiB 2.2M/s $ sudo ./flashbench --open-au /dev/mmcblk0 --blocksize=8192 --erasesize=$[4*1024*1024] --open-au-nr=1 --random 4MiB 6.57M/s 2MiB 1.9M/s 1MiB 1.99M/s 512KiB 1.73M/s 256KiB 1.82M/s 128KiB 1.37M/s 64KiB 1.4M/s 32KiB 1.33M/s 16KiB 1.2M/s 8KiB 602K/s $ sudo ./flashbench --open-au /dev/mmcblk0 --blocksize=8192 --erasesize=$[4*1024*1024] --open-au-nr=3 --random 4MiB 6.27M/s 2MiB 3.31M/s 1MiB 3.14M/s 512KiB 1.43M/s 256KiB 1.76M/s 128KiB 1.89M/s 64KiB 1.37M/s 32KiB 1.2M/s $ sudo ./flashbench --findfat --fat-nr=6 /dev/mmcblk0 --blocksize=8192 --erasesize=$[4*1024*1024] --open-au-nr=1 --random 4MiB 752K/s 4.9M/s 2.86M/s 5M/s 5.01M/s 4.93M/s 2MiB 4.54M/s 4.53M/s 3.3M/s 2.19M/s 2.19M/s 2.32M/s 1MiB 4.03M/s 4.19M/s 2.33M/s 2.34M/s 2.34M/s 2.24M/s 512KiB 4.32M/s 4.17M/s 1.38M/s 1.38M/s 1.38M/s 1.38M/s

14 years, 5 months

Samsung Essential 8GB microSDHC

by Arnd Bergmann

==> /sys/block/mmcblk0/device/cid <== 1b534d303030303010146d6df100bb00 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900003b577f800a400000 ==> /sys/block/mmcblk0/device/date <== 11/2011 ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/manfid <== 0x00001b ==> /sys/block/mmcblk0/device/name <== 00000 ==> /sys/block/mmcblk0/device/oemid <== 0x534d ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235800000000000 ==> /sys/block/mmcblk0/device/serial <== 0x146d6df1 ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=00000 MODALIAS=mmc:block $ sudo fdisk -l /dev/mmcblk0 -u Disk /dev/mmcblk0: 7964 MB, 7964983296 bytes 91 heads, 18 sectors/track, 9497 cylinders, total 15556608 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 8192 15556607 7774208 b W95 FAT32 $factor 7964983296 7964983296: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 211 arnd@klappe2:~/git/flashbench$ sudo ./flashbench -a --blocksize=1024 /dev/mmcblk0 [sudo] password for arnd: align 805306368 pre 830µs on 1.04ms post 701µs diff 276µs align 536870912 pre 835µs on 1.1ms post 773µs diff 301µs align 402653184 pre 786µs on 1.07ms post 711µs diff 318µs align 268435456 pre 819µs on 1.1ms post 773µs diff 304µs align 201326592 pre 756µs on 1.06ms post 702µs diff 334µs align 134217728 pre 818µs on 1.08ms post 772µs diff 289µs align 100663296 pre 766µs on 1.06ms post 697µs diff 325µs align 67108864 pre 837µs on 1.1ms post 785µs diff 292µs align 50331648 pre 783µs on 1.05ms post 700µs diff 306µs align 33554432 pre 831µs on 1.1ms post 767µs diff 304µs align 25165824 pre 762µs on 1.03ms post 698µs diff 302µs align 16777216 pre 821µs on 1.12ms post 780µs diff 315µs align 12582912 pre 756µs on 1.03ms post 698µs diff 303µs align 8388608 pre 813µs on 1.08ms post 772µs diff 292µs align 6291456 pre 701µs on 992µs post 721µs diff 281µs align 4194304 pre 660µs on 943µs post 736µs diff 246µs align 3145728 pre 621µs on 713µs post 710µs diff 47.8µs align 2097152 pre 669µs on 929µs post 722µs diff 233µs align 1572864 pre 612µs on 710µs post 708µs diff 49.9µs align 1048576 pre 610µs on 718µs post 723µs diff 51.3µs align 786432 pre 615µs on 712µs post 707µs diff 50.7µs align 524288 pre 604µs on 707µs post 715µs diff 47.9µs align 393216 pre 618µs on 710µs post 708µs diff 47µs align 262144 pre 608µs on 717µs post 721µs diff 52.5µs align 196608 pre 618µs on 712µs post 708µs diff 49.3µs align 131072 pre 605µs on 708µs post 718µs diff 46.2µs align 98304 pre 614µs on 701µs post 710µs diff 39.4µs align 65536 pre 607µs on 705µs post 717µs diff 42.9µs align 49152 pre 612µs on 707µs post 717µs diff 43.2µs align 32768 pre 619µs on 711µs post 710µs diff 46.2µs align 24576 pre 622µs on 713µs post 723µs diff 40.8µs align 16384 pre 622µs on 718µs post 730µs diff 42.1µs align 12288 pre 681µs on 676µs post 668µs diff 2.15µs align 8192 pre 624µs on 704µs post 721µs diff 30.9µs align 6144 pre 650µs on 644µs post 638µs diff 276ns align 4096 pre 679µs on 675µs post 663µs diff 3.71µs align 3072 pre 694µs on 689µs post 680µs diff 1.95µs align 2048 pre 710µs on 700µs post 693µs diff -1114ns arnd@klappe2:~/git/flashbench$ sudo ./flashbench --findfat --blocksize=1024 /dev/mmcblk0 --fat-nr=8 --erasesize=$[1024*1024] 1MiB 8.01M/s 7.71M/s 7.68M/s 7.84M/s 7.82M/s 7.48M/s 3.51M/s 4.74M/s 512KiB 1.22M/s 3.41M/s 4.74M/s 4.76M/s 3.31M/s 4.66M/s 4.83M/s 5.51M/s 256KiB 473K/s 4.8M/s 4.78M/s 4.47M/s 7.81M/s 7.46M/s 7.97M/s 7.68M/s 128KiB 1.12M/s 4.8M/s 4.78M/s 4.48M/s 7.79M/s 7.45M/s 7.97M/s 7.68M/s 64KiB 3.51M/s 4.8M/s 4.78M/s 4.49M/s 7.77M/s 7.39M/s 7.95M/s 7.64M/s 32KiB 3.08M/s 4.01M/s 3.02M/s 5.51M/s 5.88M/s 5.69M/s 3.18M/s 4.11M/s 16KiB 809K/s 3.85M/s 3.8M/s 3.76M/s 3.87M/s 3.74M/s 3.76M/s 3.92M/s 8KiB 1.88M/s 1.9M/s 1.89M/s 1.89M/s 1.55M/s 1.25M/s 1.11M/s 1.18M/s 4KiB 590K/s 967K/s 950K/s 573K/s 964K/s 807K/s 522K/s 925K/s 2KiB 482K/s 483K/s 358K/s 325K/s 475K/s 482K/s 480K/s 355K/s 1KiB 207K/s 205K/s 237K/s 204K/s 238K/s 207K/s 238K/s 182K/s 1MiB 7.99M/s 7.7M/s 7.69M/s 7.92M/s 7.77M/s 7.46M/s 7.99M/s 7.52M/s 512KiB 376K/s 3.44M/s 4.73M/s 4.78M/s 6.81M/s 7.47M/s 8M/s 7.64M/s 256KiB 472K/s 4.8M/s 4.77M/s 4.47M/s 7.05M/s 7.44M/s 7.96M/s 7.62M/s 128KiB 1.12M/s 4.82M/s 4.78M/s 4.48M/s 7.77M/s 7.47M/s 7.97M/s 7.66M/s 64KiB 3.5M/s 4.81M/s 4.79M/s 4.48M/s 7.77M/s 7.46M/s 7.98M/s 7.65M/s $ sudo ./flashbench --open-au --blocksize=3072 /dev/mmcblk0 --open-au-nr=1 --erasesize=$[6*1024*1024] 6MiB 5.98M/s 3MiB 2.33M/s 1.5MiB 2.33M/s 768KiB 2.33M/s 384KiB 2.33M/s 192KiB 3.04M/s 96KiB 3.99M/s 48KiB 6.1M/s 24KiB 4.15M/s 12KiB 1.85M/s 6KiB 1.11M/s 3KiB 519K/s $ sudo ./flashbench --open-au --blocksize=3072 /dev/mmcblk0 --open-au-nr=2 --erasesize=$[6*1024*1024] 6MiB 7.5M/s 3MiB 5.78M/s 1.5MiB 7.76M/s 768KiB 7.73M/s 384KiB 7.76M/s 192KiB 7.73M/s 96KiB 6.65M/s 48KiB 6.09M/s 24KiB 4.19M/s 12KiB 1.59M/s 6KiB 909K/s 3KiB 541K/s $ sudo ./flashbench --open-au --blocksize=3072 /dev/mmcblk0 --open-au-nr=3 --erasesize=$[6*1024*1024] 6MiB 7.57M/s 3MiB 5.11M/s 1.5MiB 2.92M/s 768KiB 2.24M/s 384KiB 1.56M/s 192KiB 1.48M/s 96KiB 1.1M/s 48KiB 1.11M/s $ sudo ./flashbench --open-au --blocksize=3072 /dev/mmcblk0 --open-au-nr=2 --erasesize=$[3*1024*1024] 3MiB 3.81M/s 1.5MiB 3.6M/s 768KiB 4.33M/s 384KiB 4.34M/s 192KiB 4.34M/s 96KiB 3.95M/s 48KiB 2.68M/s 24KiB 2.91M/s 12KiB 1.99M/s $ sudo ./flashbench --open-au --blocksize=3072 /dev/mmcblk0 --open-au-nr=4 --erasesize=$[3*1024*1024] 3MiB 4.72M/s 1.5MiB 2.66M/s 768KiB 1.23M/s 384KiB 621K/s 192KiB 311K/s

14 years, 5 months

amazon basics 4GB class10

by Arnd Bergmann

Do not buy this card! This seems to be a Phison controller with identical behavior to the Toshiba ones used in Kingston cards. Essentially all cards that report "0x5048" ("PH" in ascii) or "0x544D" ("TM" in ascii) in /sys/block/mmcblk0/device/oemid are no good and should be avoided. These will be two orders of magnitude slower on random writes than a reasonable model. Arnd ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 275048534430344730b005337d00b800 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900001d7f7f800a400000 ==> /sys/block/mmcblk0/device/date <== 08/2011 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x3 ==> /sys/block/mmcblk0/device/manfid <== 0x000027 ==> /sys/block/mmcblk0/device/name <== SD04G ==> /sys/block/mmcblk0/device/oemid <== 0x5048 ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235800001000000 ==> /sys/block/mmcblk0/device/serial <== 0xb005337d ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SD04G MODALIAS=mmc:block $ cat /proc/partitions 179 0 3866624 mmcblk0 179 1 3862528 mmcblk0p1 $ factor 3866624 3866624: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 59 arnd@klappe2:~/git/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize 1024 align 402653184 pre 1.15ms on 1.46ms post 890µs diff 439µs align 268435456 pre 1.08ms on 1.39ms post 863µs diff 416µs align 201326592 pre 1.08ms on 1.35ms post 849µs diff 390µs align 134217728 pre 1.08ms on 1.38ms post 850µs diff 410µs align 100663296 pre 1.11ms on 1.38ms post 862µs diff 390µs align 67108864 pre 1.09ms on 1.41ms post 859µs diff 430µs align 50331648 pre 1.04ms on 1.4ms post 876µs diff 448µs align 33554432 pre 1.14ms on 1.44ms post 878µs diff 435µs align 25165824 pre 1.09ms on 1.45ms post 874µs diff 464µs align 16777216 pre 1.14ms on 1.46ms post 886µs diff 441µs align 12582912 pre 1.15ms on 1.46ms post 884µs diff 441µs align 8388608 pre 1.12ms on 1.45ms post 892µs diff 446µs align 6291456 pre 757µs on 859µs post 855µs diff 53.4µs align 4194304 pre 1.1ms on 1.45ms post 908µs diff 448µs align 3145728 pre 741µs on 848µs post 837µs diff 59µs align 2097152 pre 748µs on 848µs post 839µs diff 54.9µs align 1572864 pre 747µs on 837µs post 845µs diff 40.7µs align 1048576 pre 789µs on 897µs post 844µs diff 80.4µs align 786432 pre 810µs on 921µs post 900µs diff 65.9µs align 524288 pre 811µs on 905µs post 895µs diff 51.6µs align 393216 pre 812µs on 921µs post 894µs diff 68.8µs align 262144 pre 810µs on 927µs post 900µs diff 71.5µs align 196608 pre 801µs on 919µs post 899µs diff 68.5µs align 131072 pre 808µs on 925µs post 895µs diff 73.9µs align 98304 pre 802µs on 917µs post 890µs diff 71.6µs align 65536 pre 811µs on 916µs post 888µs diff 66.2µs align 49152 pre 812µs on 921µs post 892µs diff 68.3µs align 32768 pre 805µs on 917µs post 895µs diff 66.8µs align 24576 pre 810µs on 919µs post 898µs diff 64.7µs align 16384 pre 809µs on 902µs post 893µs diff 50.5µs align 12288 pre 866µs on 850µs post 849µs diff -7046ns align 8192 pre 813µs on 919µs post 894µs diff 65.1µs align 6144 pre 823µs on 824µs post 829µs diff -1606ns align 4096 pre 866µs on 858µs post 851µs diff -483ns align 3072 pre 878µs on 873µs post 861µs diff 3.27µs align 2048 pre 889µs on 885µs post 878µs diff 1.05µs $ sudo hexdump -C /dev/mmcblk0 00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 000001b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 |................| 000001c0 03 01 0b 7d fd be 00 20 00 00 00 e0 75 00 00 00 |...}... ....u...| 000001d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 00000200 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00400000 eb 00 90 20 20 20 20 20 20 20 20 00 02 40 a2 18 |... ..@..| 00400010 02 00 00 00 00 f8 00 00 3f 00 80 00 00 20 00 00 |........?.... ..| 00400020 00 e0 75 00 af 03 00 00 00 00 00 00 02 00 00 00 |..u.............| 00400030 01 00 06 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00400040 80 00 29 97 55 7b 4d 00 00 00 00 00 00 00 00 00 |..).U{M.........| 00400050 00 00 46 41 54 33 32 20 20 20 00 00 00 00 00 00 |..FAT32 ......| 00400060 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 004001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 00400200 52 52 61 41 00 00 00 00 00 00 00 00 00 00 00 00 |RRaA............| 00400210 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 004003e0 00 00 00 00 72 72 41 61 ff ff ff ff 02 00 00 00 |....rrAa........| 004003f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 00400400 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 004005f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 00400600 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00400c00 eb 00 90 20 20 20 20 20 20 20 20 00 02 40 a2 18 |... ..@..| 00400c10 02 00 00 00 00 f8 00 00 3f 00 80 00 00 20 00 00 |........?.... ..| 00400c20 00 e0 75 00 af 03 00 00 00 00 00 00 02 00 00 00 |..u.............| 00400c30 01 00 06 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00400c40 80 00 29 97 55 7b 4d 00 00 00 00 00 00 00 00 00 |..).U{M.........| 00400c50 00 00 46 41 54 33 32 20 20 20 00 00 00 00 00 00 |..FAT32 ......| 00400c60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00400df0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 00400e00 52 52 61 41 00 00 00 00 00 00 00 00 00 00 00 00 |RRaA............| 00400e10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00400fe0 00 00 00 00 72 72 41 61 ff ff ff ff 02 00 00 00 |....rrAa........| 00400ff0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 00401000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 004011f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 00401200 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00714400 f8 ff ff 0f ff ff ff 0f ff ff ff 0f 00 00 00 00 |................| 00714410 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 0078a200 f8 ff ff 0f ff ff ff 0f ff ff ff 0f 00 00 00 00 |................| 0078a210 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=$[4*1024*1024] /dev/mmcblk0 --open-au-nr=1 4MiB 9.52M/s 2MiB 1.73M/s 1MiB 2.38M/s 512KiB 1.73M/s 256KiB 1.73M/s 128KiB 3.8M/s 64KiB 9.42M/s 32KiB 7.3M/s 16KiB 5.59M/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=$[4*1024*1024] /dev/mmcblk0 --open-au-nr=2 4MiB 9.52M/s 2MiB 4.49M/s 1MiB 1.79M/s 512KiB 835K/s 256KiB 407K/s 128KiB 201K/s ^Carnd@klappe2:~/git/flashbench$ sudo ./flashbench --open-au --erasesize=$[4*1024*1024] /dev/mmcblk0 --open-au-nr=1 --random 4MiB 3.85M/s 2MiB 1.04M/s 1MiB 860K/s 512KiB 326K/s arnd@klappe2:~/git/flashbench$ sudo ./flashbench --findfat --fat-nr=6 --erasesize=$[4*1024*1024] /dev/mmcblk0 --random 4MiB 2.83M/s 2.82M/s 3.8M/s 9.46M/s 9.46M/s 9.48M/s 2MiB 2.78M/s 2.78M/s 1.54M/s 1.36M/s 1.36M/s 1.36M/s 1MiB 2.83M/s 2.77M/s 751K/s 732K/s 732K/s 733K/s 512KiB 2.81M/s 2.8M/s 342K/s 435K/s 360K/s 340K/s 256KiB 1.9M/s 1.93M/s 195K/s 195K/s 207K/s 195K/s ^Carnd@klappe2:~/git/flashbench$ sudo ./flashbench --findfat --fat-nr=3 --erasesize=$[4*1024*1024] /dev/mmcblk0 --random 4MiB 2.8M/s 2.77M/s 3.79M/s 2MiB 2.81M/s 2.85M/s 1.54M/s 1MiB 2.76M/s 2.84M/s 983K/s 512KiB 2.8M/s 2.77M/s 362K/s 256KiB 1.94M/s 1.94M/s 201K/s 128KiB 1.36M/s 1.37M/s 160K/s 64KiB 903K/s 905K/s 152K/s 32KiB 486K/s 488K/s 82.7K/s 16KiB 240K/s 240K/s 40.8K/s 4MiB 2.78M/s 2.83M/s 9.23M/s 2MiB 2.8M/s 2.79M/s 9.24M/s 1MiB 2.82M/s 2.75M/s 9.34M/s 512KiB 2.84M/s 2.81M/s 9.25M/s 256KiB 2.83M/s 2.82M/s 9.26M/s 128KiB 2.79M/s 2.85M/s 9.3M/s 64KiB 2.76M/s 2.81M/s 9.17M/s 32KiB 2.5M/s 2.56M/s 7.19M/s 16KiB 2.23M/s 2.05M/s 5.54M/s 8KiB 1.13M/s 1.12M/s 3.38M/s 4KiB 597K/s 593K/s 1.61M/s 2KiB 357K/s 355K/s 852K/s 1KiB 189K/s 191K/s 444K/s 512B 101K/s 102K/s 244K/s

14 years, 5 months

Results for a Samsung 32Gb SDHC Class10

by Santiago Castillo Oli

Hi flashbench-results. I'm trying to get the most from a Samsung 32Gb SDHC Class10 card. I've run a flashbench (compiled for x86) on a Asus Eee PC 901. I'm posting the results as an attached file to this message. I guess the page size is 16Kb, but not sure about erase block. What do you think? Strangely the 4 Mb boundary is faster than bigger boundaries. Regards -- ________________________________________________ Santiago Castillo Oli scastillo(a)aragon.es Técnico de sistemas 976 71 50 06 Biblioteca de Aragón

14 years, 7 months

SanDisk Mobile Ultra 4GB Class 6 microSD part number: SDSDQY-004G-A11A

by Andrew Bradford

9 open erase blocks! Looks like a rather nice microSD card, compared to others I've seen. # BeagleBoard-xM is my only home computer with a built-in MMC device: root@192:~/flashbench# head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 035344535530344780a0a0dbc100bbc9 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900001d8a7f800a4040b9 ==> /sys/block/mmcblk0/device/date <== 11/2011 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x8 ==> /sys/block/mmcblk0/device/manfid <== 0x000003 ==> /sys/block/mmcblk0/device/name <== SU04G ==> /sys/block/mmcblk0/device/oemid <== 0x5344 ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235800300000000 ==> /sys/block/mmcblk0/device/serial <== 0xa0a0dbc1 ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SU04G MODALIAS=mmc:block # All further tests done using Transcend USB2.0 reader on my desktop andrew@bigbox:~/flashbench$ sudo sfdisk -uS -l /dev/sdc Disk /dev/sdc: 1890 cylinders, 128 heads, 32 sectors/track Units = sectors of 512 bytes, counting from 0 Device Boot Start End #sectors Id System /dev/sdc1 * 8192 7741439 7733248 c W95 FAT32 (LBA) /dev/sdc2 0 - 0 0 Empty /dev/sdc3 0 - 0 0 Empty /dev/sdc4 0 - 0 0 Empty andrew@bigbox:~/flashbench$ sudo ./flashbench -a /dev/sdc --blocksize=1024 --count=100 align 1073741824 pre 872µs on 921µs post 873µs diff 48.5µs align 536870912 pre 872µs on 973µs post 871µs diff 102µs align 268435456 pre 872µs on 935µs post 872µs diff 63.5µs align 134217728 pre 1ms on 1.04ms post 1ms diff 40.1µs align 67108864 pre 966µs on 1.07ms post 976µs diff 97.7µs align 33554432 pre 1ms on 1.07ms post 1.01ms diff 63.6µs align 16777216 pre 999µs on 1.09ms post 1.01ms diff 86.7µs align 8388608 pre 999µs on 1.03ms post 1ms diff 32.3µs align 4194304 pre 1.03ms on 1.12ms post 1.03ms diff 95.6µs align 2097152 pre 999µs on 1.1ms post 1.03ms diff 88.8µs align 1048576 pre 1.01ms on 1.04ms post 1.01ms diff 34.9µs align 524288 pre 1.01ms on 1.03ms post 1.02ms diff 18.4µs align 262144 pre 1.01ms on 1.02ms post 986µs diff 28.5µs align 131072 pre 1ms on 1.03ms post 1.01ms diff 26.9µs align 65536 pre 1ms on 1.03ms post 1.01ms diff 27.1µs align 32768 pre 985µs on 1.03ms post 1ms diff 32.2µs align 16384 pre 986µs on 982µs post 966µs diff 5.55µs align 8192 pre 1.01ms on 1ms post 1.01ms diff -9139ns align 4096 pre 981µs on 1.03ms post 1.04ms diff 25.9µs align 2048 pre 974µs on 977µs post 973µs diff 3.65µs ## 2MiB erase block ## 8KiB pages? hard to see andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --open-au-nr=1 2MiB 13.2M/s 1MiB 13.1M/s 512KiB 12.9M/s 256KiB 12.9M/s 128KiB 12.8M/s 64KiB 12.2M/s 32KiB 12.9M/s 16KiB 13M/s 8KiB 9.61M/s 4KiB 6.5M/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --open-au-nr=2 2MiB 13M/s 1MiB 7.34M/s 512KiB 12M/s 256KiB 12.2M/s 128KiB 11.4M/s 64KiB 10.3M/s 32KiB 8.52M/s 16KiB 6.35M/s 8KiB 3.46M/s 4KiB 1.6M/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --open-au-nr=3 2MiB 13M/s 1MiB 8.41M/s 512KiB 12.5M/s 256KiB 12.1M/s 128KiB 11.6M/s 64KiB 10.3M/s 32KiB 8.6M/s 16KiB 6.39M/s 8KiB 3.46M/s 4KiB 1.62M/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --open-au-nr=9 2MiB 12.8M/s 1MiB 11M/s 512KiB 12.4M/s 256KiB 12.2M/s 128KiB 11.5M/s 64KiB 10.3M/s 32KiB 8.57M/s 16KiB 6.33M/s 8KiB 3.37M/s 4KiB 1.6M/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --open-au-nr=10 2MiB 13M/s 1MiB 6.88M/s 512KiB 2.41M/s 256KiB 1.1M/s 128KiB 531K/s 64KiB 263K/s 32KiB 130K/s 16KiB 64.8K/s 8KiB 302K/s 4KiB 346K/s # 9 open-au has same performance as 2 open-au. andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --random --open-au-nr=1 2MiB 10.7M/s 1MiB 12.7M/s 512KiB 11.7M/s 256KiB 3.55M/s 128KiB 1.18M/s 64KiB 652K/s 32KiB 310K/s 16KiB 180K/s 8KiB 872K/s 4KiB 1.08M/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --random --open-au-nr=2 2MiB 12.4M/s 1MiB 12.6M/s 512KiB 12.2M/s 256KiB 3.56M/s 128KiB 1.18M/s 64KiB 649K/s 32KiB 310K/s 16KiB 179K/s 8KiB 844K/s 4KiB 982K/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --random --open-au-nr=3 2MiB 12.4M/s 1MiB 12.9M/s 512KiB 12.3M/s 256KiB 3.56M/s 128KiB 1.18M/s 64KiB 652K/s 32KiB 311K/s 16KiB 178K/s 8KiB 869K/s 4KiB 1M/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --random --open-au-nr=9 2MiB 10.4M/s 1MiB 12.6M/s 512KiB 12.1M/s 256KiB 3.54M/s 128KiB 1.18M/s 64KiB 647K/s 32KiB 310K/s 16KiB 180K/s 8KiB 820K/s 4KiB 928K/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --random --open-au-nr=10 2MiB 11.9M/s 1MiB 6.83M/s 512KiB 2.4M/s 256KiB 1.1M/s 128KiB 531K/s 64KiB 263K/s 32KiB 130K/s 16KiB 64.8K/s 8KiB 929K/s 4KiB 954K/s

14 years, 8 months

Kingston 4GB microSD part number: SDC4/4GB

by Andrew Bradford

Came with my BeagleBoard-xM purchased near the end of 2010. Card was previously used extensively. Repartitioned to be aligned to 4MiB before testing. # BeagleBoard-xM is my only home computer with a built-in MMC device: root@192:~/flashbench# head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 02544d5341303447061111058e00aaf1 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900001d6f7f800a4000a1 ==> /sys/block/mmcblk0/device/date <== 10/2010 ==> /sys/block/mmcblk0/device/driver <== ==> /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 <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235800001000000 ==> /sys/block/mmcblk0/device/serial <== 0x1111058e ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SA04G MODALIAS=mmc:block # All further tests done using Transcend USB2.0 reader andrew@bigbox:~/flashbench$ sudo sfdisk -uS -l /dev/sdc Disk /dev/sdc: 1884 cylinders, 128 heads, 32 sectors/track Units = sectors of 512 bytes, counting from 0 Device Boot Start End #sectors Id System /dev/sdc1 * 8192 7716863 7708672 c W95 FAT32 (LBA) /dev/sdc2 0 - 0 0 Empty /dev/sdc3 0 - 0 0 Empty /dev/sdc4 0 - 0 0 Empty andrew@bigbox:~/flashbench$ sudo ./flashbench -a /dev/sdc --blocksize=1024 --count=100 align 1073741824 pre 2.06ms on 3.41ms post 2.24ms diff 1.26ms align 536870912 pre 2.09ms on 3.48ms post 2.31ms diff 1.28ms align 268435456 pre 2.09ms on 3.42ms post 2.27ms diff 1.24ms align 134217728 pre 2.09ms on 3.44ms post 2.26ms diff 1.27ms align 67108864 pre 1.94ms on 3.26ms post 2.25ms diff 1.17ms align 33554432 pre 2.07ms on 3.4ms post 2.24ms diff 1.25ms align 16777216 pre 2.04ms on 3.41ms post 2.24ms diff 1.27ms align 8388608 pre 1.9ms on 3.26ms post 2.24ms diff 1.19ms align 4194304 pre 1.93ms on 3.09ms post 2.07ms diff 1.09ms align 2097152 pre 2.06ms on 2.08ms post 2.05ms diff 25.4µs align 1048576 pre 2.08ms on 2.11ms post 2.08ms diff 32.4µs align 524288 pre 2.06ms on 2.09ms post 2.05ms diff 32.2µs align 262144 pre 2.06ms on 2.08ms post 2.07ms diff 21.5µs align 131072 pre 2.06ms on 2.09ms post 2.06ms diff 24.9µs align 65536 pre 2.07ms on 2.08ms post 2.06ms diff 14µs align 32768 pre 2.06ms on 2.09ms post 2.07ms diff 23.8µs align 16384 pre 2.06ms on 2.09ms post 2.06ms diff 32µs align 8192 pre 2.06ms on 2.08ms post 2.07ms diff 17.9µs align 4096 pre 2.05ms on 2.06ms post 2.07ms diff -7783ns align 2048 pre 2.07ms on 2.07ms post 2.07ms diff -4929ns # 4MiB erase block # 8KiB page andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[4*1024*1024] --blocksize=$[4*1024] --open-au-nr=1 4MiB 3.57M/s 2MiB 4.76M/s 1MiB 4.75M/s 512KiB 4.87M/s 256KiB 4.75M/s 128KiB 4.63M/s 64KiB 4.71M/s 32KiB 4.67M/s 16KiB 4.75M/s 8KiB 4.38M/s 4KiB 3.78M/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[4*1024*1024] --blocksize=$[4*1024] --open-au-nr=2 4MiB 4.72M/s 2MiB 2.81M/s 1MiB 1.43M/s 512KiB 730K/s 256KiB 369K/s 128KiB 187K/s 64KiB 94.3K/s 32KiB 47.3K/s 16KiB 23.7K/s 8KiB 12K/s 4KiB 6.05K/s ## Only can have one open page at a time andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesi*1024*1024] --blocksize=$[4*1024] --open-au-nr=1 --random 4MiB 3.45M/s 2MiB 3.22M/s 1MiB 2.87M/s 512KiB 1.15M/s 256KiB 453K/s 128KiB 280K/s 64KiB 142K/s 32KiB 77.7K/s 16KiB 38.4K/s 8KiB 19.5K/s 4KiB 9.79K/s ## Generally horrible at random andrew@bigbox:~/flashbench$ sudo ./flashbench --findfat --fat-nr=6 /dev/sdc --blocksize=$[8*1024] --random 4MiB 5.27M/s 2.77M/s 3.32M/s 4.81M/s 4.75M/s 4.7M/s 2MiB 4.48M/s 3.05M/s 1.53M/s 2.57M/s 2.63M/s 2.64M/s 1MiB 3.94M/s 3.39M/s 1.89M/s 1.79M/s 1.8M/s 1.78M/s 512KiB 2.59M/s 2.93M/s 943K/s 929K/s 930K/s 934K/s 256KiB 3.58M/s 3.4M/s 554K/s 556K/s 557K/s 556K/s 128KiB 1.64M/s 2.33M/s 249K/s 271K/s 271K/s 259K/s 64KiB 1.54M/s 1.56M/s 134K/s 134K/s 134K/s 134K/s 32KiB 751K/s 982K/s 74K/s 74.1K/s 74.2K/s 74.2K/s

14 years, 8 months

Samsung 4GB Class 4 microSD part number MB-MS4GA

by Andrew Bradford

Sorry if my previous few emails to the list came through with a www at the beginning of my domain. There were some DNS issues, they have been fixed. This was an interesting card. I'm not exactly sure what to make of the results. # BeagleBoard-xM is my only home computer with a built-in MMC device: root@192:~/flashbench# head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 1b534d30303030301010a306a500bb51 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900001d9b7f800a40003b ==> /sys/block/mmcblk0/device/date <== 11/2011 ==> /sys/block/mmcblk0/device/driver <== ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/manfid <== 0x00001b ==> /sys/block/mmcblk0/device/name <== 00000 ==> /sys/block/mmcblk0/device/oemid <== 0x534d ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235800000000000 ==> /sys/block/mmcblk0/device/serial <== 0x10a306a5 ==> /sys/block/mmcblk0/device/subsystem <== ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=00000 MODALIAS=mmc:block # All further tests done using Transcend USB2.0 reader on my desktop andrew@bigbox:~/flashbench$ sudo sfdisk -uS -l /dev/sdc Disk /dev/sdc: 1895 cylinders, 128 heads, 32 sectors/track Units = sectors of 512 bytes, counting from 0 Device Boot Start End #sectors Id System /dev/sdc1 * 8192 7761919 7753728 c W95 FAT32 (LBA) /dev/sdc2 0 - 0 0 Empty /dev/sdc3 0 - 0 0 Empty /dev/sdc4 0 - 0 0 Empty andrew@bigbox:~/flashbench$ sudo ./flashbench -a /dev/sdc --blocksize=1024 --count=100 align 1073741824 pre 1.3ms on 1.72ms post 1.41ms diff 366µs align 536870912 pre 1.31ms on 1.69ms post 1.41ms diff 336µs align 268435456 pre 1.29ms on 1.68ms post 1.42ms diff 325µs align 134217728 pre 1.19ms on 1.54ms post 1.33ms diff 274µs align 67108864 pre 1.19ms on 1.55ms post 1.32ms diff 292µs align 33554432 pre 1.18ms on 1.54ms post 1.32ms diff 286µs align 16777216 pre 1.19ms on 1.57ms post 1.32ms diff 312µs align 8388608 pre 1.21ms on 1.62ms post 1.37ms diff 331µs align 4194304 pre 1.16ms on 1.5ms post 1.31ms diff 268µs align 2097152 pre 1.18ms on 1.54ms post 1.35ms diff 277µs align 1048576 pre 1.16ms on 1.54ms post 1.32ms diff 301µs align 524288 pre 1.19ms on 1.36ms post 1.33ms diff 97µs align 262144 pre 1.19ms on 1.32ms post 1.33ms diff 58.9µs align 131072 pre 1.18ms on 1.39ms post 1.37ms diff 109µs align 65536 pre 1.2ms on 1.34ms post 1.33ms diff 78.7µs align 32768 pre 1.19ms on 1.35ms post 1.33ms diff 88.7µs align 16384 pre 1.17ms on 1.31ms post 1.3ms diff 76.4µs align 8192 pre 1.18ms on 1.3ms post 1.3ms diff 60.5µs align 4096 pre 1.24ms on 1.24ms post 1.22ms diff 6.35µs align 2048 pre 1.28ms on 1.28ms post 1.27ms diff 7.22µs # 1MiB erase block? # 8KiB page size andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[1*1024*1024] --blocksize=$[4*1024] --open-au-nr=1 1MiB 3.08M/s 512KiB 1.88M/s 256KiB 1.91M/s 128KiB 1.98M/s 64KiB 1.88M/s 32KiB 1.95M/s 16KiB 1.93M/s 8KiB 1.94M/s 4KiB 1.72M/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --open-au-nr=1 2MiB 4.44M/s 1MiB 4.14M/s 512KiB 4.43M/s 256KiB 4.32M/s 128KiB 4.42M/s 64KiB 4.16M/s 32KiB 4.42M/s 16KiB 4.36M/s 8KiB 4.35M/s 4KiB 3.64M/s # Makes me think 2MiB erase block is accurate, bumping to --erasesize=$[4*1024*1024] has no effect. andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --open-au-nr=2 2MiB 3.99M/s 1MiB 4.34M/s 512KiB 4.23M/s 256KiB 4.25M/s 128KiB 3.93M/s 64KiB 3.78M/s 32KiB 3.31M/s 16KiB 2.14M/s 8KiB 2.11M/s 4KiB 995K/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --open-au-nr=3 2MiB 3.55M/s 1MiB 2.26M/s 512KiB 2.04M/s 256KiB 1.29M/s 128KiB 247K/s 64KiB 1.04M/s 32KiB 955K/s 16KiB 2.04M/s 8KiB 1.69M/s 4KiB 602K/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --open-au-nr=4 2MiB 3.8M/s 1MiB 2.3M/s 512KiB 894K/s 256KiB 447K/s 128KiB 221K/s 64KiB 112K/s 32KiB 205K/s 16KiB 1.27M/s 8KiB 1.15M/s 4KiB 652K/s # 1 open-au is good, 2 open-au is OK, 3 open-au is falling off fast. # In 3 and 4 open-au, I'm not sure why the slowdown at 32KiB and then the speed-up at 16KiB. Caching in the controller? andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --random --open-au-nr=1 2MiB 7.63M/s 1MiB 2.36M/s 512KiB 2.09M/s 256KiB 737K/s 128KiB 396K/s 64KiB 189K/s 32KiB 126K/s 16KiB 1.23M/s 8KiB 1.28M/s 4KiB 776K/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$*1024*1024] --blocksize=$[4*1024] --random --open-au-nr=2 2MiB 3.82M/s 1MiB 2.36M/s 512KiB 2.13M/s 256KiB 666K/s 128KiB 399K/s 64KiB 188K/s 32KiB 132K/s 16KiB 2.45M/s 8KiB 2.12M/s 4KiB 869K/s andrew@bigbox:~/flashbench$ sudo ./flashbench /dev/sdc --open-au --erasesize=$[2*1024*1024] --blocksize=$[4*1024] --random --open-au-nr=3 2MiB 4.11M/s 1MiB 2.19M/s 512KiB 1.59M/s 256KiB 605K/s 128KiB 288K/s 64KiB 158K/s 32KiB 121K/s 16KiB 1.99M/s 8KiB 1.12M/s 4KiB 708K/s

14 years, 8 months

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