Flashbench-results

flashbench-results@lists.linaro.org

1 participants
600 discussions

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/

13 years, 1 month

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

13 years, 1 month

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.

13 years, 1 month

16 GB Patriot xporter XT Boost

by Arnd Bergmann

# this is a 16 GB Patriot xporter XT Boost USB flash drive, lsusb claim # 2 GB, but that is understandable $ lsusb Bus 001 Device 023: ID 13fe:3100 Kingston Technology Company Inc. 2 GB USB stick # The erase block size is clearly 8 MB, page size is not clear from this: $ sudo ./flashbench /dev/sdc -a --blocksize=1024 align 1610612736 pre 545µs on 872µs post 721µs diff 239µs align 1073741824 pre 527µs on 811µs post 659µs diff 218µs align 805306368 pre 547µs on 818µs post 673µs diff 208µs align 536870912 pre 536µs on 814µs post 664µs diff 214µs align 402653184 pre 548µs on 819µs post 666µs diff 212µs align 268435456 pre 541µs on 822µs post 673µs diff 215µs align 201326592 pre 548µs on 818µs post 658µs diff 215µs align 134217728 pre 547µs on 822µs post 651µs diff 223µs align 100663296 pre 554µs on 822µs post 654µs diff 218µs align 67108864 pre 540µs on 823µs post 662µs diff 222µs align 50331648 pre 528µs on 817µs post 644µs diff 231µs align 33554432 pre 557µs on 815µs post 672µs diff 200µs align 25165824 pre 543µs on 821µs post 680µs diff 209µs align 16777216 pre 548µs on 822µs post 675µs diff 211µs align 12582912 pre 666µs on 688µs post 660µs diff 25.3µs align 8388608 pre 543µs on 819µs post 656µs diff 219µs align 6291456 pre 658µs on 697µs post 663µs diff 36.3µs align 4194304 pre 651µs on 697µs post 656µs diff 44.2µs align 3145728 pre 668µs on 692µs post 672µs diff 21.7µs align 2097152 pre 660µs on 688µs post 673µs diff 21.2µs align 1572864 pre 664µs on 695µs post 666µs diff 30µs align 1048576 pre 669µs on 696µs post 659µs diff 32.2µs align 786432 pre 664µs on 697µs post 652µs diff 39.6µs align 524288 pre 670µs on 698µs post 656µs diff 35.1µs align 393216 pre 664µs on 697µs post 651µs diff 40µs align 262144 pre 661µs on 696µs post 667µs diff 32.6µs align 196608 pre 665µs on 695µs post 663µs diff 30.8µs align 131072 pre 657µs on 680µs post 666µs diff 18.7µs align 98304 pre 670µs on 684µs post 669µs diff 14.3µs align 65536 pre 663µs on 684µs post 660µs diff 22.3µs align 49152 pre 653µs on 895µs post 668µs diff 235µs align 32768 pre 664µs on 684µs post 669µs diff 17.7µs align 24576 pre 667µs on 685µs post 667µs diff 18.1µs align 16384 pre 652µs on 894µs post 659µs diff 239µs align 12288 pre 665µs on 685µs post 659µs diff 23.1µs align 8192 pre 653µs on 681µs post 669µs diff 20.2µs align 6144 pre 656µs on 683µs post 667µs diff 21.9µs align 4096 pre 663µs on 676µs post 672µs diff 8.79µs align 3072 pre 670µs on 670µs post 665µs diff 2.62µs align 2048 pre 661µs on 677µs post 658µs diff 17.1µs # Optimum I/O size is 64 KB, page size looks like 32 KB effective sudo ./flashbench --erasesize=$[8*1024*1024] --open-au --open-au-nr=3 /dev/sdc --blocksize=4096 8MiB 15M/s 4MiB 14.9M/s 2MiB 14.9M/s 1MiB 15.4M/s 512KiB 15.7M/s 256KiB 13.1M/s 128KiB 13.1M/s 64KiB 16.4M/s 32KiB 10.9M/s 16KiB 3.12M/s 8KiB 1.67M/s 4KiB 861K/s # six erase blocks is still fine $ sudo ./flashbench --erasesize=$[8*1024*1024] --open-au --open-au-nr=6 /dev/sdc 8MiB 15.3M/s 4MiB 14.6M/s 2MiB 14.2M/s 1MiB 14.9M/s 512KiB 15.4M/s 256KiB 13.5M/s 128KiB 12.3M/s 64KiB 16M/s 32KiB 10.6M/s 16KiB 3.16M/s # ten erase block not so, gradual decline hints at log-structured writes: $ sudo ./flashbench --erasesize=$[8*1024*1024] --open-au --open-au-nr=10 /dev/sdc 8MiB 14.8M/s 4MiB 12.9M/s 2MiB 10.5M/s 1MiB 6.79M/s 512KiB 4.25M/s ^C # get the stick into fast case again, by writing to it with six blocks: $ sudo ./flashbench --erasesize=$[8*1024*1024] --open-au --open-au-nr=6 /dev/sdc --blocksize=$[4 * 1024 * 1024] 8MiB 12.8M/s 4MiB 12.6M/s $ sudo ./flashbench --erasesize=$[8*1024*1024] --open-au --open-au-nr=6 /dev/sdc --blocksize=$[4 * 1024 * 1024] 8MiB 14.6M/s 4MiB 14.3M/s # seven block still ok: $ sudo ./flashbench --erasesize=$[8*1024*1024] --open-au --open-au-nr=7 /dev/sdc --blocksize=$[1 * 1024 * 1024] 8MiB 14.3M/s 4MiB 14.4M/s 2MiB 14M/s 1MiB 14.5M/s # eight blocks ok: $ sudo ./flashbench --erasesize=$[8*1024*1024] --open-au --open-au-nr=8 /dev/sdc --blocksize=$[32 * 1024] 8MiB 14.7M/s 4MiB 14.1M/s 2MiB 14.5M/s 1MiB 14.9M/s 512KiB 15M/s 256KiB 13.3M/s 128KiB 12M/s 64KiB 16.4M/s 32KiB 10.4M/s # nine blocks is where we hit the wall, though 16 KB and smaller is ok: $ sudo ./flashbench --erasesize=$[8*1024*1024] --open-au --open-au-nr=9 /dev/sdc --blocksize=$[32 * 1024] 8MiB 14.7M/s 4MiB 13.9M/s 2MiB 12.3M/s 1MiB 10M/s 512KiB 7.11M/s 256KiB 4.8M/s 128KiB 2.51M/s 64KiB 1.44M/s 32KiB 726K/s 16KiB 3.02M/s 8KiB 1.51M/s 4KiB 782K/s # resetting the device by writing 8 blocks again: $ sudo ./flashbench --erasesize=$[8*1024*1024] --open-au --open-au-nr=8 /dev/sdc --blocksize=$[4 * 1024 * 1024] 8MiB 14.6M/s 4MiB 14.6M/s # trying eight blocks with random access, the device copes ok, but not # perfect, another indication for log-structured: $ sudo ./flashbench --erasesize=$[8*1024*1024] --open-au --open-au-nr=8 /dev/sdc --blocksize=$[4 * 1024] --random 8MiB 15M/s 4MiB 11.6M/s 2MiB 8.3M/s 1MiB 7.84M/s 512KiB 5.3M/s 256KiB 6.53M/s 128KiB 4.79M/s 64KiB 7.37M/s 32KiB 6.69M/s 16KiB 3.08M/s 8KiB 1.55M/s 4KiB 787K/s # nine blocks random I/O: somewhat worse than 9 blocks linear, 16 KB # blocks are still as fast as always $ sudo ./flashbench --erasesize=$[8*1024*1024] --open-au --open-au-nr=9 /dev/sdc --blocksize=$[4 * 1024] --random 8MiB 14.6M/s 4MiB 11.3M/s 2MiB 7.05M/s 1MiB 4.74M/s 512KiB 3.21M/s 256KiB 1.8M/s 128KiB 1.13M/s 64KiB 694K/s 32KiB 376K/s 16KiB 2.96M/s 8KiB 1.45M/s 4KiB 739K/s # Looking for FAT optimizations, nothing there: $ sudo ./flashbench --erasesize=$[8*1024*1024] --findfat --fat-nr=4 /dev/sdc --blocksize=$[4 * 1024] --random 8MiB 15.2M/s 16.3M/s 14.3M/s 14.1M/s 4MiB 11.4M/s 11.4M/s 11.7M/s 12M/s 2MiB 8.32M/s 8.3M/s 8.32M/s 8.41M/s 1MiB 7.93M/s 7.93M/s 7.93M/s 7.89M/s 512KiB 5.34M/s 5.32M/s 5.33M/s 5.34M/s 256KiB 6.6M/s 6.51M/s 6.6M/s 6.59M/s 128KiB 4.85M/s 4.86M/s 4.85M/s 4.85M/s 64KiB 7.48M/s 7.51M/s 7.52M/s 7.48M/s 32KiB 6.79M/s 6.91M/s 6.96M/s 6.97M/s 16KiB 3.18M/s 3.19M/s 3.2M/s 3.2M/s 8KiB 1.61M/s 1.62M/s 1.62M/s 1.61M/s 4KiB 820K/s 819K/s 812K/s 818K/s Verdict: Decent algorithm, the stick assumes random writes when accessed with 16 KB blocks but linear writes for anything larger. Linear write performance good, even across many erase blocks.

13 years, 1 month

Re: [Flashbench] USB Stick: Corsair Flash Voyager GT

by Arnd Bergmann

On Thursday 24 March 2011, Michael Monnerie wrote: > We could speak german, I guess? Yes, but I'd prefer to keep the discussion on the mailing list if interesting results come up. > On Donnerstag, 24. März 2011 Arnd Bergmann wrote: > > > > Are these results reproducible? It's not at all clear to me that the > > erase size is really 4 MB, it could also be 1 MB for instance, > > especially if your stick is from before 2010. You can rerun the > > command with --count=100 or more, or with larger block sizes to get > > a better feeling. > > # ./flashbench -a /dev/sde --blocksize=4096 --count=100 > sched_setscheduler: Operation not permitted > align 536870912 pre 703µs on 798µs post 666µs diff 114µs > align 268435456 pre 700µs on 753µs post 681µs diff 62.8µs > align 134217728 pre 786µs on 783µs post 645µs diff 67.4µs > align 67108864 pre 723µs on 772µs post 675µs diff 73.3µs > align 33554432 pre 701µs on 762µs post 674µs diff 74.4µs > align 16777216 pre 701µs on 741µs post 685µs diff 48.3µs > align 8388608 pre 695µs on 749µs post 668µs diff 66.8µs > align 4194304 pre 706µs on 791µs post 671µs diff 102µs > align 2097152 pre 674µs on 707µs post 692µs diff 23.9µs > align 1048576 pre 683µs on 726µs post 701µs diff 34.3µs > align 524288 pre 671µs on 726µs post 717µs diff 32.3µs > align 262144 pre 698µs on 713µs post 687µs diff 20.7µs > align 131072 pre 682µs on 740µs post 704µs diff 46.9µs > align 65536 pre 687µs on 727µs post 697µs diff 35.1µs > align 32768 pre 712µs on 722µs post 692µs diff 19.9µs > align 16384 pre 667µs on 699µs post 674µs diff 27.9µs > align 8192 pre 702µs on 770µs post 686µs diff 75.8µs Ok, this is much clearer: I'm pretty sure that it's either 4 MB or 8 MB, based on this result. Note how all diff values below 4 MB are smaller than all diff values above 4 MB. Something strange is going at at 4 MB, so it's not clear whether it belongs to the upper or lower half. > # ./flashbench -a /dev/sde --blocksize=8192 --count=50 > sched_setscheduler: Operation not permitted > align 536870912 pre 879µs on 899µs post 858µs diff 30.9µs > align 268435456 pre 847µs on 906µs post 842µs diff 61.1µs > align 134217728 pre 996µs on 968µs post 836µs diff 52µs > align 67108864 pre 811µs on 839µs post 757µs diff 55µs > align 33554432 pre 871µs on 908µs post 847µs diff 48.7µs > align 16777216 pre 854µs on 914µs post 818µs diff 78µs > align 8388608 pre 851µs on 908µs post 850µs diff 58.2µs > align 4194304 pre 892µs on 880µs post 908µs diff -20511n > align 2097152 pre 828µs on 849µs post 885µs diff -7708ns > align 1048576 pre 874µs on 886µs post 862µs diff 17.9µs > align 524288 pre 852µs on 869µs post 915µs diff -15025n > align 262144 pre 844µs on 895µs post 940µs diff 2.73µs > align 131072 pre 848µs on 884µs post 907µs diff 6.1µs > align 65536 pre 837µs on 857µs post 840µs diff 18µs > align 32768 pre 831µs on 864µs post 861µs diff 17.7µs > align 16384 pre 855µs on 841µs post 826µs diff 201ns > > Could it be some linux cache is in the way? No, all I/O is done with O_DIRECT, which completely bypasses the page cache. In theory, there could be a cache on the stick, but that's rarely the case. The USB protocol adds some jitter here, and for some reason you cannot use real-time scheduling, which makes the results less accurate. > > Another helpful indication would be the output of 'fdisk -lu > > /dev/sde': It will show the start of the partition and the size of > > the drive, both should be a multiple of the erase block size. > > # fdisk -lu /dev/sde > > Disk /dev/sde: 16.2 GB, 16240345088 bytes > 255 heads, 63 sectors/track, 1974 cylinders, total 31719424 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: 0x925df597 Ok, 16240345088 bytes is 121 times 128 MiB, so it's certainly not using 4128 KiB blocks or some other strange unit. > Device Boot Start End Blocks Id System > /dev/sde1 63 31712309 15856123+ 7 HPFS/NTFS/exFAT > > I didn't use sde1 but sde for the tests, so it shouldn't have a meaning. > I'll change the partition to start at 2048 or whatever I find the erasesize to be. Be careful here. The original FAT layout is typically made specifically for this stick, so it's probably a good idea to make a backup of the first few blocks. > > Finally, a third way is to look at a gnuplot chart on the output of > > > > flashbench -s -o output.plot /dev/sde --scatter-order=10 > > --scatter-span=2 --blocksize=8192 gnuplot -p -e 'plot "output.plot"' > > > > On many drives, the boundaries between erase blocks show up as spikes > > in the chart. > > Phew, two lines, more or less, and spikes everwhere (see attached). Right, nothing to see here yet. It only shows the first 8 MB, so if the spike is every 8 MB, it won't show up here. Use --scatter-order=12 to show more. Also, the jitter from the USB protocol may hide some details, which might get better with a larger --count= value, but that would make the test run much longer. It's probably good enough to assume that the size is actually 8 MB or 4 MB, and keep going from there. > > Also, please post the USB ID and name output from 'lsusb' for > > reference. > > # lsusb -v > Bus 001 Device 005: ID 1b1c:1a90 Ok. > Now with 16 I got it slower, still no visible border: > > # ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[64 * 1024] /dev/sde --open-au-nr=4 > sched_setscheduler: Operation not permitted > 4MiB 7.3M/s > 2MiB 11.2M/s > 1MiB 15.7M/s > 512KiB 19.2M/s > 256KiB 14.5M/s > 128KiB 12.8M/s > 64KiB 18.8M/s > # ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[64 * 1024] /dev/sde --open-au-nr=16 > sched_setscheduler: Operation not permitted > 4MiB 9.77M/s > 2MiB 3.41M/s > 1MiB 7.38M/s > 512KiB 5.69M/s > ^C (took too long) If it takes too long, that's a good indication that something interesting is happening ;-) > Seems that stick wants to hide it's internals? Not completely unusual, but somewhat harder than most. I've committed some updates now that might help make the --open-au results a bit clearer, and faster. What I would recommend now is to update to the latest git version (just uploaded), and then try increasing numbers of --open-au-nr= with 4 MB erasesize, until you hit the cutoff. Try the same with --random, for the last fast one and the first slow one: ./flashbench -O --erasesize=$[4 * 1024 * 1024] /dev/sde --open-au-nr=5 ./flashbench -O --erasesize=$[4 * 1024 * 1024] /dev/sde --open-au-nr=6 ./flashbench -O --erasesize=$[4 * 1024 * 1024] /dev/sde --open-au-nr=7 ... ./flashbench -O --erasesize=$[4 * 1024 * 1024] /dev/sde --open-au-nr=N => N is the number of 4 MB blocks that can not be handled ./flashbench -O --erasesize=$[4 * 1024 * 1024] /dev/sde --open-au-nr=(N-1) --random ./flashbench -O --erasesize=$[4 * 1024 * 1024] /dev/sde --open-au-nr=N --random => Verify that the (N-1) --random case is still fast ./flashbench -O --erasesize=$[8 * 1024 * 1024] /dev/sde --open-au-nr=((N-1)/2) --random ./flashbench -O --erasesize=$[8 * 1024 * 1024] /dev/sde --open-au-nr=(N-1) --random ./flashbench -O --erasesize=$[8 * 1024 * 1024] /dev/sde --open-au-nr=(N-1) --random Arnd

13 years, 1 month

Re: [Flashbench] IPPBX For Distributor

by Alex

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13 years, 1 month

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by Sam Peng / BSI-SZX

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13 years, 1 month

USB Stick: Corsair Flash Voyager GT

by Michael Monnerie

I can't interpret the numbers for the AUs, can you help me? # ./flashbench -a /dev/sde --blocksize=1024 sched_setscheduler: Operation not permitted align 536870912 pre 745µs on 756µs post 696µs diff 36.2µs align 268435456 pre 698µs on 882µs post 670µs diff 198µs align 134217728 pre 722µs on 899µs post 715µs diff 180µs align 67108864 pre 720µs on 712µs post 669µs diff 17.1µs align 33554432 pre 750µs on 765µs post 639µs diff 70.1µs align 16777216 pre 727µs on 777µs post 684µs diff 71.8µs align 8388608 pre 691µs on 727µs post 646µs diff 58.3µs align 4194304 pre 689µs on 769µs post 675µs diff 87.3µs align 2097152 pre 697µs on 879µs post 715µs diff 173µs align 1048576 pre 716µs on 899µs post 789µs diff 147µs align 524288 pre 659µs on 775µs post 724µs diff 83.4µs align 262144 pre 657µs on 735µs post 685µs diff 63.6µs align 131072 pre 656µs on 706µs post 756µs diff -248ns align 65536 pre 655µs on 715µs post 650µs diff 62.3µs align 32768 pre 732µs on 792µs post 743µs diff 54.1µs align 16384 pre 685µs on 808µs post 767µs diff 82.6µs align 8192 pre 732µs on 764µs post 697µs diff 49.8µs align 4096 pre 661µs on 692µs post 681µs diff 20.7µs align 2048 pre 671µs on 657µs post 653µs diff -5465ns # ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sde --open-au-nr=2 sched_setscheduler: Operation not permitted 4MiB 6.69M/s 2MiB 11.1M/s 1MiB 13.2M/s 512KiB 14.4M/s 256KiB 14.6M/s # ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sde --open-au-nr=3 sched_setscheduler: Operation not permitted 4MiB 6.68M/s 2MiB 11.2M/s 1MiB 12.9M/s 512KiB 14.5M/s 256KiB 14.8M/s # ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sde --open-au-nr=4 sched_setscheduler: Operation not permitted 4MiB 6.8M/s 2MiB 10.9M/s 1MiB 13M/s 512KiB 14.4M/s 256KiB 14.6M/s # ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sde --open-au-nr=6 sched_setscheduler: Operation not permitted 4MiB 7.45M/s 2MiB 9.24M/s 1MiB 16.4M/s 512KiB 17.4M/s 256KiB 7.98M/s -- mit freundlichen Grüssen, Michael Monnerie, Ing. BSc it-management Internet Services: Protéger http://proteger.at [gesprochen: Prot-e-schee] Tel: +43 660 / 415 6531 // ****** Radiointerview zum Thema Spam ****** // http://www.it-podcast.at/archiv.html#podcast-100716 // // Haus zu verkaufen: http://zmi.at/langegg/

13 years, 1 month

You could find the competitive price mobile phone without B2B

by Picasa Web Albums

Dear Sir or Madam, Glad to hear that you're on the market for mobile phone. We, Wei Wan Technology are a professional manufacturer for mobile phone. Dual Sim card and Triple Sim card etc Please contact me if any questions. Sincerely hope to find a way to cooperate with your esteemed company! Thanks & best regards Juce E-mail: elink(a)vip.188.com Factory Address: 5/F, Building 21, ChenTian Industrial Park, BaoTian 2nd Road, Xixiang Town, Bao'anDistrict, Shenzhen, GuangDong Province, China

13 years, 1 month

Kingston microSD 2 GB (2010 model)

by Arnd Bergmann

$ head /sys/block/mmcblk0/device/{c*,scr,*rev,*id,serial,*size,name,date} ==> /sys/block/mmcblk0/device/cid <== 02544d534130324705200a985700a700 ==> /sys/block/mmcblk0/device/csd <== 002e00325b5aa3acffffff800a800000 ==> /sys/block/mmcblk0/device/scr <== 0225800001000000 ==> /sys/block/mmcblk0/device/fwrev <== 0x5 ==> /sys/block/mmcblk0/device/hwrev <== 0x0 ==> /sys/block/mmcblk0/device/cid <== 02544d534130324705200a985700a700 ==> /sys/block/mmcblk0/device/manfid <== 0x000002 ==> /sys/block/mmcblk0/device/oemid <== 0x544d ==> /sys/block/mmcblk0/device/serial <== 0x200a9857 ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/name <== SA02G ==> /sys/block/mmcblk0/device/date <== 07/2010 $ sudo ./flashbench -a /dev/mmcblk0 --blocksize 1024 --count=50 [sudo] password for arnd: align 268435456 pre 1.45ms on 2.14ms post 1.19ms diff 819µs align 134217728 pre 1.77ms on 2.39ms post 1.26ms diff 874µs align 67108864 pre 1.78ms on 2.16ms post 1.19ms diff 677µs align 33554432 pre 1.77ms on 2.17ms post 1.21ms diff 680µs align 16777216 pre 1.58ms on 2.18ms post 1.21ms diff 788µs align 8388608 pre 1.26ms on 2.13ms post 1.21ms diff 900µs align 4194304 pre 1.3ms on 2.16ms post 1.21ms diff 911µs align 2097152 pre 1.5ms on 2.16ms post 1.18ms diff 822µs align 1048576 pre 1.21ms on 1.41ms post 1.24ms diff 186µs align 524288 pre 1.21ms on 1.27ms post 1.21ms diff 60.4µs align 262144 pre 1.21ms on 1.27ms post 1.21ms diff 59.3µs align 131072 pre 1.21ms on 1.27ms post 1.21ms diff 59.2µs align 65536 pre 1.21ms on 1.27ms post 1.21ms diff 59.2µs align 32768 pre 1.21ms on 1.27ms post 1.21ms diff 60.3µs align 16384 pre 1.22ms on 1.27ms post 1.21ms diff 57.8µs align 8192 pre 1.21ms on 1.28ms post 1.21ms diff 61.7µs align 4096 pre 1.21ms on 1.26ms post 1.21ms diff 41.6µs align 2048 pre 1.21ms on 1.26ms post 1.21ms diff 41.1µs $ sudo ./flashbench --findfat --fat-nr=4 /dev/mmcblk0 --blocksize=1024 --erasesize=$[2* 1024 * 1024] 2MiB 2.33M/s 4.67M/s 9.32M/s 9.57M/s 1MiB 3.4M/s 9.49M/s 9.31M/s 9.59M/s 512KiB 3.41M/s 9.54M/s 9.57M/s 9.51M/s 256KiB 4.95M/s 9.73M/s 9.63M/s 9.62M/s 128KiB 5.79M/s 9.76M/s 9.64M/s 9.72M/s 64KiB 6.04M/s 9.59M/s 9.9M/s 9.85M/s 32KiB 4.35M/s 8.92M/s 8.82M/s 8.87M/s 16KiB 2.98M/s 7.23M/s 7.25M/s 7.31M/s 8KiB 1.68M/s 4.67M/s 4.59M/s 4.62M/s 4KiB 847K/s 1.45M/s 1.56M/s 1.55M/s 2KiB 431K/s 726K/s 715K/s 736K/s 1KiB 218K/s 137K/s 137K/s 126K/s $ sudo ./flashbench --findfat --fat-nr=4 /dev/mmcblk0 --blocksize=4096 --erasesize=$[2* 1024 * 1024] --random 2MiB 2.3M/s 9.48M/s 9.29M/s 9.22M/s 1MiB 3.42M/s 5.89M/s 3.01M/s 3M/s 512KiB 4.51M/s 2.03M/s 1.85M/s 1.82M/s 256KiB 4.89M/s 1.32M/s 1.31M/s 1.31M/s 128KiB 4.93M/s 696K/s 696K/s 694K/s 64KiB 5.58M/s 850K/s 853K/s 849K/s 32KiB 4.56M/s 325K/s 326K/s 327K/s ^C $ sudo ./flashbench --open-au --open-au-nr=1 /dev/mmcblk0 --erasesize=$[2 * 1024 * 1024] --blocksize=1024 2MiB 8.25M/s 1MiB 2.65M/s 512KiB 2.67M/s 256KiB 2.67M/s 128KiB 4.16M/s 64KiB 9.48M/s 32KiB 8.56M/s 16KiB 6.59M/s 8KiB 4M/s 4KiB 1.32M/s 2KiB 544K/s 1KiB 14.1K/s (!!!) $ sudo ./flashbench --open-au --open-au-nr=1 /dev/mmcblk0 --erasesize=$[4 * 1024 * 1024] --blocksize=1024 4MiB 9.37M/s 2MiB 4.17M/s 1MiB 4.17M/s 512KiB 4.17M/s 256KiB 4.17M/s 128KiB 5.8M/s 64KiB 9.54M/s 32KiB 8.47M/s 16KiB 6.5M/s 8KiB 3.94M/s 4KiB 1.26M/s 2KiB 538K/s ^C $ sudo ./flashbench --open-au --open-au-nr=2 /dev/mmcblk0 --erasesize=$[2 * 1024 * 1024] --blocksize=1024 2MiB 5.82M/s 1MiB 3.62M/s 512KiB 1.43M/s 256KiB 658K/s 128KiB 318K/s 64KiB 232K/s ^C $ sudo ./flashbench --open-au --open-au-nr=2 /dev/mmcblk0 --erasesize=$[4 * 1024 * 1024] --blocksize=1024 4MiB 8.52M/s 2MiB 5.78M/s 1MiB 2.79M/s 512KiB 1.34M/s 256KiB 639K/s 128KiB 314K/s 64KiB 233K/s 32KiB 116K/s ^C

13 years, 1 month

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