Flashbench-results July 2012

flashbench-results@lists.linaro.org

7 participants
5 discussions

Re: [Flashbench] Transcend Ultimate 32GB Class 10 microSDHC TS32GUSDHC10

by Victor

>> Are you referring to the "essential" microSDHC 32GB (MB-MSBGA) that you >> mentioned in some previous post in the mailing list? > > Yes, that's the one. > >> What should be the the erase block size then? 1.5 MiB or some multiple? > > I think it's 8 GB, but it's trying very hard to hide this. I've lost its original partitioning and formatting and I'd be interested in having a raw copy of the first 17 MiB using dd or at least to know the details about the partitioning and formatting (it can be from the MB-MSBGA). Actually I'd like to partition it with a FAT32 and an ext4. Should I care about the C/H/S for partitioning or can I just ignore it? I plan to set the FAT32 partition with a cluster size of 32 KiB. If I understand well the partition should start at the 8 MiB offset and not the 4 MiB one, shoudn't it? And of course I'd set the right amount of reserved sectors so the data would start at the 16 MiB offset to keep it align with the erase block size of 8 MiB, right? I've also tried to see if there is any FAT area but it doesn't look to be the case here: $ sudo ./flashbench /dev/mmcblk0 --findfat --erasesize=$[2*1024*1024] --blocksize=$[16*1024] --fat-nr=10 2MiB 8.43M/s 8.92M/s 9.13M/s 8.81M/s 8.87M/s 9.01M/s 8.75M/s 8.97M/s 8.94M/s 8.62M/s 1MiB 8.68M/s 8.97M/s 8.63M/s 9.03M/s 9.01M/s 8.86M/s 8.81M/s 8.88M/s 8.91M/s 8.72M/s 512KiB 8.76M/s 8.93M/s 9.01M/s 8.71M/s 9M/s 8.59M/s 8.93M/s 8.92M/s 8.82M/s 8.58M/s 256KiB 8.8M/s 8.93M/s 9.03M/s 8.72M/s 8.84M/s 9.03M/s 8.63M/s 8.91M/s 8.92M/s 9.01M/s 128KiB 8.67M/s 8.87M/s 8.83M/s 8.77M/s 8.92M/s 8.9M/s 8.75M/s 8.93M/s 9.01M/s 9.03M/s 64KiB 8.68M/s 8.82M/s 8.88M/s 8.71M/s 8.94M/s 8.85M/s 8.74M/s 8.92M/s 8.72M/s 8.76M/s 32KiB 7.11M/s 7.13M/s 7.23M/s 7.22M/s 7.24M/s 7.46M/s 7.11M/s 7.33M/s 7.37M/s 7.42M/s 16KiB 4.58M/s 4.81M/s 4.75M/s 4.76M/s 4.77M/s 4.77M/s 4.7M/s 4.7M/s 4.8M/s 2.1M/s About the ext4, do you have any recommendation? I plan to make it start at an offset multiple of the erase block size. I've found some recommendations here: http://blogofterje.wordpress.com/2012/01/14/optimizing-fs-on-sd-card/ Thus I'm planning to format it that way: mkfs.ext4 -O ^has_journal -E stride=4,stripe-width=512 -b 4096 ### # TS32GUSDHC10 made in China # Beside that I'd like to share the results from another TS32GUSDHC10 that I have for now with a SanDisk controller. It looks comparable to the results for the SDSDU-032G-A11. I've run the tests from the Lenovo laptop. # # Label on front # 1208409555DEW BM MADE IN CHINA A06120 1881 # # Details # $ head /sys/block/mmcblk0/device/* ==> /sys/block/mmcblk0/device/block <== head: error reading `/sys/block/mmcblk0/device/block': Is a directory ==> /sys/block/mmcblk0/device/cid <== 03534453553332478017ba22e200c300 ==> /sys/block/mmcblk0/device/csd <== 400e00325b590000edc87f800a404000 ==> /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 <== SU32G ==> /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 <== 0235800100000000 ==> /sys/block/mmcblk0/device/serial <== 0x17ba22e2 ==> /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=SU32G MODALIAS=mmc:block ## From the OEM ID we can guess it's a SanDisk: $ printf "\x"53"\x"44"\n" SD # # Size (blocks of 512 bytes) # $ cat /sys/block/mmcblk0/device/block/mmcblk0/size 62333952 # # Partitions # $ sudo fdisk /dev/mmcblk0 Command (m for help): p Disk /dev/mmcblk0: 31.9 GB, 31914983424 bytes 255 heads, 63 sectors/track, 3880 cylinders, total 62333952 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 62333951 31162880 c W95 FAT32 (LBA) ## Note: It is with its original partitioning and formatting. # # Read benchmark # $ sudo ./flashbench -a /dev/mmcblk0 -b 1024 align 8589934592 pre 841µs on 881µs post 690µs diff 115µs align 4294967296 pre 885µs on 958µs post 693µs diff 169µs align 2147483648 pre 888µs on 950µs post 690µs diff 161µs align 1073741824 pre 789µs on 957µs post 690µs diff 218µs align 536870912 pre 844µs on 947µs post 693µs diff 179µs align 268435456 pre 845µs on 952µs post 692µs diff 183µs align 134217728 pre 809µs on 920µs post 688µs diff 172µs align 67108864 pre 832µs on 945µs post 690µs diff 184µs align 33554432 pre 893µs on 947µs post 689µs diff 156µs align 16777216 pre 820µs on 934µs post 681µs diff 184µs align 8388608 pre 767µs on 890µs post 663µs diff 176µs align 4194304 pre 718µs on 805µs post 652µs diff 120µs ## Erase block size? align 2097152 pre 659µs on 663µs post 663µs diff 2.26µs align 1048576 pre 658µs on 662µs post 664µs diff 809ns align 524288 pre 704µs on 806µs post 663µs diff 122µs align 262144 pre 660µs on 662µs post 660µs diff 2.11µs align 131072 pre 664µs on 660µs post 660µs diff -1346ns align 65536 pre 658µs on 664µs post 664µs diff 3.11µs align 32768 pre 664µs on 669µs post 661µs diff 6.67µs align 16384 pre 660µs on 662µs post 664µs diff 528ns align 8192 pre 665µs on 668µs post 664µs diff 3.6µs align 4096 pre 658µs on 660µs post 656µs diff 3.05µs align 2048 pre 662µs on 663µs post 663µs diff 35ns ## It looks like the erase block size is 4 MiB, which can be confirmed by the ## fact the FAT32 partition starts at the 4 MiB offset. # # FAT area # $ sudo ./flashbench /dev/mmcblk0 --findfat --erasesize=$[2*1024*1024] --blocksize=$[16*1024] --fat-nr=7 2MiB 13.6M/s 13.7M/s 5.92M/s 6.03M/s 5.45M/s 7.73M/s 13.7M/s 1MiB 5.83M/s 13.8M/s 5.41M/s 6.9M/s 6.27M/s 6.91M/s 13.7M/s 512KiB 12.3M/s 13.7M/s 6.82M/s 6.22M/s 5.99M/s 6.69M/s 13.7M/s 256KiB 11.5M/s 13.7M/s 5.21M/s 5.9M/s 5.7M/s 7.9M/s 13.7M/s 128KiB 13.1M/s 13.8M/s 5.88M/s 7.65M/s 5.88M/s 6.16M/s 13.6M/s 64KiB 13.5M/s 13.7M/s 7.35M/s 6M/s 7.2M/s 5.34M/s 13M/s 32KiB 11.9M/s 12M/s 6.3M/s 5.48M/s 5.73M/s 5.15M/s 12M/s 16KiB 9.68M/s 9.81M/s 4.71M/s 4.84M/s 4.7M/s 5.06M/s 9.75M/s ## FAT should be between 4 MiB and 12 MiB. ## That matches the details I can read from an hexdump -C against the disk ## about the FAT size and the number of reserved sectors to have the data ## starts at the 12 MiB offset. # # Write benchmark # ## It looks like the card can handle up to 11 concurrent 4 MiB blocks... $ sudo time ./flashbench --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=1 --offset=$[40*1024*1024] /dev/mmcblk0 4MiB 13.7M/s 2MiB 13.2M/s 1MiB 12M/s 512KiB 12.7M/s 256KiB 12.7M/s 128KiB 13.4M/s 64KiB 13.5M/s 32KiB 11.9M/s 16KiB 9.68M/s real 0m3.568s user 0m0.212s sys 0m0.328s $ sudo time ./flashbench --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=11 --offset=$[40*1024*1024] /dev/mmcblk0 4MiB 13.2M/s 2MiB 13.6M/s 1MiB 13.5M/s 512KiB 13.4M/s 256KiB 13.2M/s 128KiB 12.8M/s 64KiB 12.2M/s 32KiB 10M/s 16KiB 7.42M/s real 0m35.892s user 0m0.164s sys 0m0.488s $ sudo time ./flashbench --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=12 --offset=$[40*1024*1024] /dev/mmcblk0 4MiB 9M/s 2MiB 10.5M/s 1MiB 8.45M/s 512KiB 8.46M/s 256KiB 8.25M/s 128KiB 8.11M/s 64KiB 9.39M/s 32KiB 8.06M/s 16KiB 6.52M/s real 0m54.451s user 0m0.240s sys 0m0.568s $ sudo time ./flashbench --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=1 --offset=$[40*1024*1024] --random /dev/mmcblk0 4MiB 13.7M/s 2MiB 13M/s 1MiB 12.1M/s 512KiB 5.64M/s 256KiB 3.01M/s 128KiB 2.32M/s 64KiB 2.23M/s 32KiB 1.22M/s 16KiB 590K/s real 0m17.887s user 0m0.200s sys 0m0.352s - Victor

14 years, 1 month

Help me make sense of the numbers please

by Gerald Livingston

Patriot LX Series 16GB Class 10 PSF16GSDHC10-PC The 32GB version is already in the table but I can't be sure the boundaries would be the same. I'm trying to follow this tutorial to optimize the ext4 partition on one of these for use in a Raspberry Pi. I also require a small vfat (about 40MB) partition at the beginning for /boot. http://blogofterje.wordpress.com/2012/01/14/optimizing-fs-on-sd-card/ If anyone can make sense of the attached numbers could you tell me what boundary to set the partition on and the stripe/stride numbers to use. Or explain to me how I can get more meaningful numbers with flashbench for inclusion of this card in the table? thanks, Gerald

14 years, 1 month

Write size of sdcard

by preetham

Hi, I was wondering if there is a way to determine the write size and page size using flashbench as per the data in the table in the below link? https://wiki.linaro.org/WorkingGroups/Kernel/Projects/FlashCardSurvey?actio… Thanks, Preetham

14 years, 1 month

SD Card OEM information.

by preetham

Hi, Is there a way where I can grab OEM and other information from /dev/sdc1? It seems like most information can be extracted from /dev/mmc,,./devices*. I was wondering if I could extract the same information from sdc1? Thanks, Preetham

14 years, 1 month

Sandsik micro SDHC "I" 4GB

by Venkatraman S

[root@buildroot mmc1]#head /sys/block/mmcblk1/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk1/device/block <==mmcblk1/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk1/device/cid <== 035344535530344780114a9d6000b967 ==> /sys/block/mmcblk1/device/csd <== 400e00325b5900001d8a7f800a4040b9 ==> /sys/block/mmcblk1/device/date <== 09/2011 ==> /sys/block/mmcblk1/device/driver <== ==> /sys/block/mmcblk1/device/erase_size <== 512 ==> /sys/block/mmcblk1/device/fwrev <== 0x0 ==> /sys/block/mmcblk1/device/hwrev <== 0x8 ==> /sys/block/mmcblk1/device/manfid <== 0x000003 ==> /sys/block/mmcblk1/device/name <== SU04G ==> /sys/block/mmcblk1/device/oemid <== 0x5344 ==> /sys/block/mmcblk1/device/power <== ==> /sys/block/mmcblk1/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk1/device/scr <== 0235800100000000 ==> /sys/block/mmcblk1/device/serial <== 0x114a9d60 ==> /sys/block/mmcblk1/device/subsystem <== ==> /sys/block/mmcblk1/device/type <== SD ==> /sys/block/mmcblk1/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SU04G MODALIAS=mmc:block [root@buildroot mmc1]# ./flashbench -a /dev/mmcblk1 --blocksize=1024 align 1073741824 pre 1.16ms on 1.36ms post 1.07ms diff 248µs align 536870912 pre 1.1ms on 1.33ms post 990µs diff 279µs align 268435456 pre 1.12ms on 1.33ms post 1.02ms diff 259µs align 134217728 pre 1.22ms on 1.46ms post 1.09ms diff 307µs align 67108864 pre 1.21ms on 1.46ms post 1.08ms diff 312µs align 33554432 pre 1.27ms on 1.54ms post 1.11ms diff 351µs align 16777216 pre 1.19ms on 1.47ms post 1.07ms diff 344µs align 8388608 pre 1.13ms on 1.4ms post 1.08ms diff 294µs align 4194304 pre 1.01ms on 1.23ms post 1ms diff 227µs align 2097152 pre 1.02ms on 1.14ms post 1.02ms diff 122µs align 1048576 pre 1.06ms on 1.18ms post 1.06ms diff 120µs align 524288 pre 1.06ms on 1.18ms post 1.06ms diff 124µs align 262144 pre 1.06ms on 1.18ms post 1.06ms diff 118µs align 131072 pre 1.06ms on 1.17ms post 1.06ms diff 116µs align 65536 pre 1.01ms on 1.12ms post 1.01ms diff 116µs align 32768 pre 1.06ms on 1.19ms post 1.09ms diff 120µs align 16384 pre 1.06ms on 1.22ms post 1.06ms diff 159µs align 8192 pre 1.07ms on 1.12ms post 1.07ms diff 52.3µs align 4096 pre 1.07ms on 1.12ms post 1.06ms diff 50.1µs align 2048 pre 1.07ms on 1.12ms post 1.07ms diff 48µs ##4MB Erase block size, 8KB pages [root@buildroot ~]# ./openau.sh ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=1 4MiB 2.5M/s 2MiB 7.27M/s 1MiB 3.94M/s 512KiB 4.37M/s 256KiB 17M/s ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=2 4MiB 6.42M/s 2MiB 20M/s 1MiB 19.2M/s 512KiB 19.1M/s 256KiB 18.2M/s ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=3 4MiB 6.78M/s 2MiB 6.26M/s 1MiB 19.2M/s 512KiB 19.2M/s 256KiB 18.2M/s ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=4 4MiB 11.6M/s 2MiB 4.94M/s 1MiB 9.83M/s 512KiB 7.49M/s 256KiB 7.38M/s ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=5 4MiB 9.32M/s 2MiB 9.03M/s 1MiB 3.71M/s 512KiB 3.68M/s 256KiB 3.51M/s ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=6 4MiB 6.07M/s 2MiB 3.12M/s 1MiB 2.37M/s 512KiB 3.04M/s 256KiB 2.92M/s ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=7 4MiB 4.53M/s 2MiB 2.83M/s 1MiB 1.97M/s 512KiB 2.16M/s 256KiB 3.04M/s ##Difficult to comprehend results here. Try with --random [root@buildroot ~]# ./openau.sh --random ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=1 --random 4MiB 2.62M/s 2MiB 6.15M/s 1MiB 3.75M/s 512KiB 4.3M/s 256KiB 9.04M/s ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=2 --random 4MiB 6.21M/s 2MiB 19.9M/s 1MiB 19.4M/s 512KiB 17.8M/s 256KiB 9.2M/s ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=3 --random 4MiB 8.62M/s 2MiB 19.9M/s 1MiB 19.2M/s 512KiB 17.7M/s 256KiB 9.21M/s ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=4 --random 4MiB 6.87M/s 2MiB 11.2M/s 1MiB 10.2M/s 512KiB 4.9M/s 256KiB 3.94M/s ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=5 --random 4MiB 6.47M/s 2MiB 4.42M/s 1MiB 3.73M/s 512KiB 3.02M/s 256KiB 1.52M/s ++ ./flashbench -O --erasesize=4194304 --blocksize=262144 /dev/mmcblk1 --open-au-nr=6 --random 4MiB 5.12M/s 2MiB 3.14M/s 1MiB 2.17M/s 512KiB 1.7M/s 256KiB 1.1M/s ##Much better. open-au = 3 ? [root@buildroot ~]#./flashbench --findfat --fat-nr=6 /dev/mmcblk1 --blocksize=$[8*1024] --erasesize=$[4*1024*1024] 4MiB 20.4M/s 6.67M/s 10M/s 5.26M/s 18.1M/s 5.28M/s 2MiB 5.12M/s 6.62M/s 9.83M/s 5.26M/s 18.1M/s 5.23M/s 1MiB 5.06M/s 6.32M/s 9.84M/s 5.23M/s 17.8M/s 5.09M/s 512KiB 5.02M/s 6.31M/s 9.81M/s 5.2M/s 17.4M/s 5.19M/s 256KiB 4.97M/s 6.12M/s 10.1M/s 5.14M/s 17.4M/s 5.14M/s 128KiB 4.87M/s 5.7M/s 10.8M/s 5.03M/s 16.6M/s 5.01M/s 64KiB 4.76M/s 4.93M/s 13.2M/s 4.85M/s 16M/s 4.84M/s 32KiB 4.48M/s 4.52M/s 12.7M/s 4.52M/s 13.8M/s 4.51M/s 16KiB 3.92M/s 3.81M/s 9.46M/s 3.97M/s 9.66M/s 3.94M/s 8KiB 2.97M/s 2.88M/s 5.26M/s 2.96M/s 5.25M/s 2.93M/s ##Once more 4MiB 5.28M/s 16.8M/s 20.6M/s 20.4M/s 5.26M/s 5.1M/s 2MiB 5.09M/s 17M/s 20.7M/s 5.28M/s 5.13M/s 5.1M/s 1MiB 5.1M/s 17.8M/s 19.7M/s 5.22M/s 5.07M/s 5.09M/s 512KiB 5.03M/s 16.5M/s 19.2M/s 5.23M/s 5.09M/s 5.08M/s 256KiB 5M/s 16.3M/s 18.8M/s 5.17M/s 5M/s 5.03M/s 128KiB 4.9M/s 15.5M/s 17.7M/s 4.98M/s 4.91M/s 4.96M/s 64KiB 4.76M/s 14.4M/s 16.2M/s 4.86M/s 4.83M/s 4.86M/s 32KiB 4.51M/s 12.3M/s 13.8M/s 4.54M/s 4.55M/s 4.5M/s 16KiB 3.96M/s 8.69M/s 9.59M/s 3.98M/s 3.98M/s 3.92M/s 8KiB 2.96M/s 4.96M/s 5.24M/s 2.95M/s 2.99M/s 2.96M/s ##FAT table area is just in the 2nd and 3rd Erase block (8MB) ?

14 years, 2 months

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Flashbench-results July 2012