Flashbench-results

flashbench-results@lists.linaro.org

2 participants
639 discussions

by Sergio benjamim Rocha filho

Hello! These are the results from a SanDisk SDHC card 8 GB class 4 (7560 MiB), using flashbench 62-1 (Linux Mint 15 / Ubuntu 13.04 repository, and kernel 3.11.0). The SD Card is raw, without formatation. There are informations about the card controller from my laptop too. I have some questions about flashbench tool. Are there any development in this tool yet? Am I using the correct version? What is the -a parameter, it's not in documentation (it's not in the --help parameter too). lsusb -v Bus 001 Device 008: ID 058f:6366 Alcor Micro Corp. Multi Flash Reader Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x058f Alcor Micro Corp. idProduct 0x6366 Multi Flash Reader bcdDevice 1.00 iManufacturer 1 Generic iProduct 2 Mass Storage Device iSerial 3 058F63666433 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 32 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 100mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 8 Mass Storage bInterfaceSubClass 6 SCSI bInterfaceProtocol 80 Bulk-Only iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x01 EP 1 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 bNumConfigurations 1 Device Status: 0x0000 (Bus Powered) head /sys/block/sdb/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/sdb/device/block <== ==> /sys/block/sdb/device/bsg <== ==> /sys/block/sdb/device/device_blocked <== 0 ==> /sys/block/sdb/device/dh_state <== detached ==> /sys/block/sdb/device/driver <== ==> /sys/block/sdb/device/eh_timeout <== 10 ==> /sys/block/sdb/device/evt_media_change <== 0 ==> /sys/block/sdb/device/generic <== ==> /sys/block/sdb/device/iocounterbits <== 32 ==> /sys/block/sdb/device/iodone_cnt <== 0x10d82 ==> /sys/block/sdb/device/ioerr_cnt <== 0x2 ==> /sys/block/sdb/device/iorequest_cnt <== 0x10d82 ==> /sys/block/sdb/device/max_sectors <== 240 ==> /sys/block/sdb/device/modalias <== scsi:t-0x00 ==> /sys/block/sdb/device/model <== Card Reader ==> /sys/block/sdb/device/power <== ==> /sys/block/sdb/device/queue_depth <== 1 ==> /sys/block/sdb/device/queue_type <== none ==> /sys/block/sdb/device/rev <== 1.00 ==> /sys/block/sdb/device/scsi_device <== ==> /sys/block/sdb/device/scsi_disk <== ==> /sys/block/sdb/device/scsi_generic <== ==> /sys/block/sdb/device/scsi_level <== 0 ==> /sys/block/sdb/device/state <== running ==> /sys/block/sdb/device/subsystem <== ==> /sys/block/sdb/device/timeout <== 30 ==> /sys/block/sdb/device/type <== 0 ==> /sys/block/sdb/device/uevent <== DEVTYPE=scsi_device DRIVER=sd MODALIAS=scsi:t-0x00 ==> /sys/block/sdb/device/vendor <== Multiple flashbench -a /dev/sdb --blocksize=1024 --count=100 align 2147483648 pre 1.31ms on 1.73ms post 1.25ms diff 456µs align 1073741824 pre 1.3ms on 1.76ms post 1.24ms diff 485µs align 536870912 pre 1.28ms on 1.79ms post 1.32ms diff 491µs align 268435456 pre 1.24ms on 1.68ms post 1.23ms diff 444µs align 134217728 pre 1.3ms on 1.82ms post 1.3ms diff 518µs align 67108864 pre 1.3ms on 1.77ms post 1.25ms diff 488µs align 33554432 pre 1.02ms on 1.34ms post 1.01ms diff 327µs align 16777216 pre 1.01ms on 1.35ms post 989µs diff 348µs align 8388608 pre 974µs on 1.35ms post 1.01ms diff 361µs align 4194304 pre 1.25ms on 1.71ms post 1.03ms diff 568µs align 2097152 pre 1.29ms on 1.44ms post 1.26ms diff 160µs align 1048576 pre 1.25ms on 1.44ms post 1.3ms diff 162µs align 524288 pre 1.31ms on 1.44ms post 1.26ms diff 153µs align 262144 pre 1.25ms on 1.42ms post 1.29ms diff 155µs align 131072 pre 1.28ms on 1.43ms post 1.26ms diff 167µs align 65536 pre 1.25ms on 1.43ms post 1.29ms diff 160µs align 32768 pre 1.28ms on 1.43ms post 1.26ms diff 165µs align 16384 pre 1.24ms on 1.43ms post 1.29ms diff 168µs align 8192 pre 1.25ms on 1.31ms post 1.25ms diff 56.5µs align 4096 pre 1.19ms on 1.34ms post 1.25ms diff 118µs align 2048 pre 1.2ms on 1.25ms post 1.2ms diff 51.8µs # Maybe this card has 4 MiB of Erased Block and 16 kiB of Page? flashbench -a /dev/sdb --blocksize=1024 --count=100 align 2147483648 pre 1.31ms on 1.73ms post 1.25ms diff 450µs align 1073741824 pre 1.3ms on 1.76ms post 1.24ms diff 491µs align 536870912 pre 1.28ms on 1.79ms post 1.32ms diff 484µs align 268435456 pre 1.25ms on 1.68ms post 1.23ms diff 435µs align 134217728 pre 1.29ms on 1.82ms post 1.3ms diff 525µs align 67108864 pre 1.3ms on 1.77ms post 1.24ms diff 495µs align 33554432 pre 1.02ms on 1.35ms post 996µs diff 346µs align 16777216 pre 1.02ms on 1.35ms post 995µs diff 341µs align 8388608 pre 974µs on 1.35ms post 994µs diff 368µs align 4194304 pre 1.27ms on 1.71ms post 1.03ms diff 562µs align 2097152 pre 1.31ms on 1.44ms post 1.26ms diff 161µs align 1048576 pre 1.25ms on 1.44ms post 1.3ms diff 164µs align 524288 pre 1.3ms on 1.43ms post 1.26ms diff 156µs align 262144 pre 1.25ms on 1.43ms post 1.29ms diff 162µs align 131072 pre 1.3ms on 1.44ms post 1.26ms diff 157µs align 65536 pre 1.25ms on 1.42ms post 1.27ms diff 159µs align 32768 pre 1.25ms on 1.43ms post 1.24ms diff 182µs align 16384 pre 1.24ms on 1.43ms post 1.27ms diff 178µs align 8192 pre 1.25ms on 1.31ms post 1.24ms diff 67.7µs align 4096 pre 1.19ms on 1.34ms post 1.24ms diff 126µs align 2048 pre 1.19ms on 1.25ms post 1.18ms diff 69.6µs flashbench -a /dev/sdb --blocksize=2048 --count=100 align 2147483648 pre 1.29ms on 1.72ms post 1.25ms diff 448µs align 1073741824 pre 1.28ms on 1.7ms post 1.22ms diff 449µs align 536870912 pre 1.25ms on 1.74ms post 1.29ms diff 473µs align 268435456 pre 1.25ms on 1.66ms post 1.22ms diff 421µs align 134217728 pre 1.28ms on 1.79ms post 1.29ms diff 501µs align 67108864 pre 1.3ms on 1.74ms post 1.26ms diff 466µs align 33554432 pre 1.12ms on 1.51ms post 1.1ms diff 401µs align 16777216 pre 1.09ms on 1.45ms post 949µs diff 427µs align 8388608 pre 1.1ms on 1.46ms post 949µs diff 438µs align 4194304 pre 1.15ms on 1.6ms post 1.07ms diff 487µs align 2097152 pre 1.16ms on 1.28ms post 1.15ms diff 126µs align 1048576 pre 1.15ms on 1.28ms post 1.16ms diff 126µs align 524288 pre 1.16ms on 1.28ms post 1.15ms diff 123µs align 262144 pre 1.15ms on 1.28ms post 1.16ms diff 123µs align 131072 pre 1.16ms on 1.28ms post 1.15ms diff 130µs align 65536 pre 1.15ms on 1.28ms post 1.16ms diff 122µs align 32768 pre 1.16ms on 1.28ms post 1.15ms diff 123µs align 16384 pre 1.15ms on 1.28ms post 1.16ms diff 122µs align 8192 pre 1.13ms on 1.17ms post 1.13ms diff 39.8µs align 4096 pre 1.13ms on 1.17ms post 1.13ms diff 41.5µs flashbench -a /dev/sdb --blocksize=2048 --count=100 align 2147483648 pre 1.69ms on 2.11ms post 1.58ms diff 479µs align 1073741824 pre 1.67ms on 2.1ms post 1.63ms diff 452µs align 536870912 pre 1.65ms on 2.15ms post 1.68ms diff 486µs align 268435456 pre 1.59ms on 2.01ms post 1.49ms diff 469µs align 134217728 pre 1.69ms on 2.19ms post 1.7ms diff 499µs align 67108864 pre 1.68ms on 2.15ms post 1.59ms diff 517µs align 33554432 pre 1.39ms on 1.78ms post 1.38ms diff 394µs align 16777216 pre 1.27ms on 1.68ms post 990µs diff 551µs align 8388608 pre 1.26ms on 1.68ms post 985µs diff 555µs align 4194304 pre 1.38ms on 1.88ms post 1.29ms diff 543µs align 2097152 pre 1.44ms on 1.6ms post 1.44ms diff 155µs align 1048576 pre 1.44ms on 1.58ms post 1.48ms diff 122µs align 524288 pre 1.48ms on 1.6ms post 1.43ms diff 140µs align 262144 pre 1.44ms on 1.6ms post 1.48ms diff 143µs align 131072 pre 1.48ms on 1.59ms post 1.43ms diff 140µs align 65536 pre 1.43ms on 1.56ms post 1.48ms diff 110µs align 32768 pre 1.47ms on 1.58ms post 1.43ms diff 129µs align 16384 pre 1.43ms on 1.59ms post 1.47ms diff 137µs align 8192 pre 1.41ms on 1.48ms post 1.41ms diff 73.5µs align 4096 pre 1.41ms on 1.48ms post 1.41ms diff 67.4µs flashbench -f /dev/sdb 4MiB 5.02M/s 8.23M/s 2.39M/s 5.04M/s 10.4M/s 2.08M/s 2MiB 4.64M/s 17.1M/s 4.91M/s 4.41M/s 5.01M/s 4.51M/s 1MiB 4.98M/s 13.9M/s 4.69M/s 4.98M/s 4.72M/s 1.75M/s 512KiB 4.74M/s 16.9M/s 4.98M/s 4.74M/s 4.78M/s 15M/s 256KiB 4.99M/s 13.4M/s 4.93M/s 4.71M/s 1.99M/s 4.97M/s 128KiB 4.74M/s 14.1M/s 4.53M/s 4.96M/s 4.38M/s 4.99M/s 64KiB 4.73M/s 13.3M/s 4.92M/s 4.76M/s 2.03M/s 4.9M/s 32KiB 4.41M/s 15.1M/s 4.9M/s 4.42M/s 4.96M/s 4.68M/s 16KiB 4.58M/s 11M/s 4.78M/s 4M/s 4.83M/s 3.39M/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=1 4MiB 14.9M/s 2MiB 17.9M/s 1MiB 18.5M/s 512KiB 18.1M/s 256KiB 18.1M/s 128KiB 17.6M/s 64KiB 17.3M/s 32KiB 16M/s 16KiB 13.2M/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=2 4MiB 16.4M/s 2MiB 17.8M/s 1MiB 17.8M/s 512KiB 17.1M/s 256KiB 16.3M/s 128KiB 15.1M/s 64KiB 14M/s 32KiB 11.3M/s 16KiB 8.04M/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=3 4MiB 17.4M/s 2MiB 18.2M/s 1MiB 17.7M/s 512KiB 17.1M/s 256KiB 16M/s 128KiB 15.3M/s 64KiB 14M/s 32KiB 11.2M/s 16KiB 7.92M/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=4 4MiB 10.9M/s 2MiB 5.98M/s 1MiB 9.38M/s 512KiB 7.03M/s 256KiB 6.67M/s 128KiB 6.8M/s 64KiB 8.36M/s 32KiB 7.11M/s 16KiB 5.92M/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=5 4MiB 6.5M/s 2MiB 4.62M/s 1MiB 3.2M/s 512KiB 3.41M/s 256KiB 3.25M/s 128KiB 2.83M/s 64KiB 4.41M/s 32KiB 6.06M/s 16KiB 3.52M/s With --random parameter: flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=1 4MiB 15.8M/s 2MiB 17.8M/s 1MiB 18M/s 512KiB 15.7M/s 256KiB 8.44M/s 128KiB 3.01M/s 64KiB 1.45M/s 32KiB 719K/s 16KiB 343K/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=2 4MiB 13.9M/s 2MiB 17.8M/s 1MiB 17.8M/s 512KiB 15.5M/s 256KiB 8.48M/s 128KiB 2.99M/s 64KiB 1.45M/s 32KiB 718K/s 16KiB 342K/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=3 4MiB 7.17M/s 2MiB 17.9M/s 1MiB 17.1M/s 512KiB 15.5M/s 256KiB 8.36M/s 128KiB 3.01M/s 64KiB 1.45M/s 32KiB 718K/s 16KiB 343K/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=4 4MiB 8.54M/s 2MiB 5.46M/s 1MiB 9.28M/s 512KiB 4.51M/s 256KiB 3.65M/s 128KiB 1.43M/s 64KiB 745K/s 32KiB 441K/s 16KiB 254K/s flashbench /dev/sdb --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=5 4MiB 5.46M/s 2MiB 5.01M/s 1MiB 4.92M/s 512KiB 2.16M/s 256KiB 1.32M/s 128KiB 799K/s 64KiB 432K/s 32KiB 246K/s 16KiB 177K/s I think that the Erased Block has 4 MiB and each Page has 16 kiB, but the open-au it's only 1 or maybe 2, I don't know. Is that correct? I want use F2FS in this card, but I don't know if this card is good for this, and I don't know too how to alignment correctly with F2FS, using mkfs.f2fs. Sérgio Benjamim

12 years, 3 months

Samsung MB-MP8GB 8 GB microSDHC

by Andrew Bradford

This is a "Plus" card but rated class 4 unlike the MB-MP8GA that looks almost identical. The coloring and logos almost match except for the class marks. This card's internals are different. MB-MP8GA results for comparison: http://lists.linaro.org/pipermail/flashbench-results/2012-August/000322.html andrew@brick:~/git/flashbench$ head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 1b534d30303030301004b2901000cc00 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900003ac57f800a400000 ==> /sys/block/mmcblk0/device/date <== 12/2012 ==> /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 ==> /sys/block/mmcblk0/device/power <== ==> /sys/block/mmcblk0/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk0/device/scr <== 0235800300000000 ==> /sys/block/mmcblk0/device/serial <== 0x04b29010 ==> /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 andrew@brick:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0[sudo] password for andrew: Disk /dev/mmcblk0: 7888 MB, 7888437248 bytes, 15407104 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 label type: dos Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/mmcblk0p1 8192 15407103 7699456 b W95 FAT32 andrew@brick:~/git/flashbench$ factor 7888437248 7888437248: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 7523 andrew@brick:~/git/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 --count=100 align 2147483648 pre 510µs on 753µs post 599µs diff 199µs align 1073741824 pre 495µs on 723µs post 584µs diff 183µs align 536870912 pre 501µs on 746µs post 555µs diff 218µs align 268435456 pre 501µs on 728µs post 592µs diff 182µs align 134217728 pre 490µs on 713µs post 583µs diff 177µs align 67108864 pre 485µs on 703µs post 553µs diff 184µs align 33554432 pre 498µs on 706µs post 582µs diff 166µs align 16777216 pre 492µs on 705µs post 576µs diff 171µs align 8388608 pre 491µs on 702µs post 573µs diff 170µs align 4194304 pre 489µs on 697µs post 571µs diff 168µs align 2097152 pre 485µs on 700µs post 573µs diff 171µs align 1048576 pre 488µs on 702µs post 544µs diff 186µs align 524288 pre 489µs on 703µs post 545µs diff 186µs align 262144 pre 491µs on 703µs post 546µs diff 185µs align 131072 pre 487µs on 699µs post 574µs diff 169µs align 65536 pre 473µs on 700µs post 547µs diff 190µs align 32768 pre 480µs on 719µs post 576µs diff 192µs align 16384 pre 473µs on 691µs post 571µs diff 169µs align 8192 pre 479µs on 679µs post 558µs diff 160µs align 4096 pre 552µs on 554µs post 543µs diff 6.32µs align 2048 pre 569µs on 571µs post 560µs diff 6.49µs ## 8 kiB pages, unclear erase block but should be power of 2 based off factor andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --open-au-nr=1 4MiB 8.23M/s 2MiB 8.39M/s 1MiB 8.25M/s 512KiB 8.23M/s 256KiB 8.22M/s 128KiB 8.2M/s 64KiB 8.08M/s 32KiB 7.1M/s 16KiB 5.89M/s 8KiB 3.81M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --open-au-nr=2 4MiB 8.33M/s 2MiB 8.18M/s 1MiB 8.19M/s 512KiB 8.24M/s 256KiB 7.95M/s 128KiB 7.77M/s 64KiB 7.33M/s 32KiB 5.86M/s 16KiB 4.4M/s 8KiB 2.62M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --open-au-nr=3 4MiB 8.23M/s 2MiB 8.17M/s 1MiB 8.27M/s 512KiB 8.34M/s 256KiB 8.3M/s 128KiB 8.01M/s 64KiB 7.53M/s 32KiB 5.96M/s 16KiB 4.29M/s 8KiB 2.46M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --open-au-nr=4 4MiB 3.85M/s 2MiB 3.82M/s 1MiB 2.95M/s 512KiB 2.96M/s ^C ## 3 linear open-au, poor compared to the MB-MP8GA's 7 andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --random --open-au-nr=1 4MiB 6.56M/s 2MiB 8.71M/s 1MiB 8.24M/s 512KiB 8.46M/s 256KiB 8.41M/s 128KiB 8.29M/s 64KiB 7.71M/s 32KiB 6.72M/s 16KiB 5.13M/s 8KiB 3.12M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --random --open-au-nr=2 4MiB 8.57M/s 2MiB 7.98M/s 1MiB 8.41M/s 512KiB 8.4M/s 256KiB 8.34M/s 128KiB 8.07M/s 64KiB 7.46M/s 32KiB 6.06M/s 16KiB 4.35M/s 8KiB 2.47M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --random --open-au-nr=3 4MiB 6.56M/s 2MiB 8.1M/s 1MiB 8.46M/s 512KiB 8.39M/s 256KiB 8.3M/s 128KiB 8.07M/s 64KiB 7.57M/s 32KiB 6.01M/s 16KiB 4.26M/s 8KiB 2.52M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --random --open-au-nr=4 4MiB 6.73M/s 2MiB 7.87M/s 1MiB 8.38M/s 512KiB 8.36M/s 256KiB 8.25M/s 128KiB 7.98M/s 64KiB 7.49M/s 32KiB 5.91M/s 16KiB 4.38M/s 8KiB 2.66M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[4*1024*1024] --blocksize=$[8*1024] --random --open-au-nr=5 4MiB 4.68M/s 2MiB 3.97M/s 1MiB 1.67M/s ^C ## 4 random open-au, which is more than the linear. ## I must have the erase block size wrong or something. ## Regardless, that's not very good compared to MB-MS8GA. andrew@brick:~/git/flashbench$ sudo ./flashbench --find-fat /dev/mmcblk04MiB 2.82M/s 4.66M/s 4.76M/s 3.14M/s 4.78M/s 4.82M/s 2MiB 3.23M/s 4.78M/s 4.8M/s 3.26M/s 4.74M/s 4.78M/s 1MiB 3.27M/s 4.77M/s 4.79M/s 3.23M/s 4.78M/s 4.79M/s 512KiB 3.27M/s 4.79M/s 4.72M/s 3.23M/s 4.78M/s 4.75M/s 256KiB 3.24M/s 4.79M/s 4.78M/s 3.27M/s 4.78M/s 4.73M/s 128KiB 3.26M/s 4.78M/s 4.78M/s 3.24M/s 4.77M/s 4.81M/s 64KiB 3.26M/s 4.76M/s 4.7M/s 3.24M/s 4.74M/s 4.75M/s 32KiB 3.03M/s 4.32M/s 4.34M/s 3.06M/s 4.36M/s 4.31M/s 16KiB 2.74M/s 3.8M/s 3.74M/s 2.72M/s 3.79M/s 3.76M/s

12 years, 3 months

Samsung MB-MS8GB 8GB microSDHC

by Andrew Bradford

andrew@brick:~/git/flashbench$ head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 1b534d303030303010592232db00d600 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900003a917f800a400000 ==> /sys/block/mmcblk0/device/date <== 06/2013 ==> /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 <== 0235000000000000 ==> /sys/block/mmcblk0/device/serial <== 0x592232db ==> /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 andrew@brick:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0 Disk /dev/mmcblk0: 7861 MB, 7861174272 bytes, 15353856 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 label type: dos Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/mmcblk0p1 8192 15353855 7672832 b W95 FAT32 andrew@brick:~/git/flashbench$ factor 7861174272 7861174272: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 7 7 17 andrew@brick:~/git/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 --count=100 align 2147483648 pre 391µs on 476µs post 453µs diff 54.1µs align 1073741824 pre 394µs on 478µs post 454µs diff 54.7µs align 536870912 pre 392µs on 477µs post 454µs diff 54µs align 268435456 pre 391µs on 476µs post 453µs diff 53.3µs align 134217728 pre 383µs on 460µs post 469µs diff 34.3µs align 67108864 pre 366µs on 444µs post 451µs diff 35.4µs align 33554432 pre 366µs on 443µs post 451µs diff 34.8µs align 16777216 pre 366µs on 444µs post 451µs diff 35.7µs align 8388608 pre 374µs on 463µs post 461µs diff 45.1µs align 4194304 pre 373µs on 466µs post 458µs diff 50.6µs align 2097152 pre 385µs on 480µs post 472µs diff 51µs align 1048576 pre 383µs on 481µs post 476µs diff 51.1µs align 524288 pre 383µs on 452µs post 471µs diff 24.5µs align 262144 pre 380µs on 451µs post 475µs diff 23.7µs align 131072 pre 383µs on 451µs post 471µs diff 24µs align 65536 pre 382µs on 451µs post 474µs diff 23.2µs align 32768 pre 384µs on 451µs post 469µs diff 24.6µs align 16384 pre 381µs on 451µs post 475µs diff 23µs align 8192 pre 379µs on 445µs post 465µs diff 22.8µs align 4096 pre 427µs on 422µs post 415µs diff 764ns align 2048 pre 450µs on 445µs post 439µs diff 671ns ## Looks like 1 MiB erase blocks andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --open-au-nr=1 1MiB 2.94M/s 512KiB 4.96M/s 256KiB 7.78M/s 128KiB 8.53M/s 64KiB 4.25M/s 32KiB 3.16M/s 16KiB 6.13M/s 8KiB 4.25M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --open-au-nr=2 1MiB 2.51M/s 512KiB 8.78M/s 256KiB 8.7M/s 128KiB 8.74M/s 64KiB 8.64M/s 32KiB 8.2M/s 16KiB 6.77M/s 8KiB 4.27M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --open-au-nr=3 1MiB 1.67M/s 512KiB 1.63M/s 256KiB 1.07M/s 128KiB 517K/s 64KiB 397K/s 32KiB 366K/s 16KiB 364K/s 8KiB 2.61M/s ## 2 linear open-au andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --random --open-au-nr=1 1MiB 1.51M/s 512KiB 7.85M/s 256KiB 8.61M/s 128KiB 1.66M/s 64KiB 7.54M/s 32KiB 7.97M/s 16KiB 6.51M/s 8KiB 4.09M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --random --open-au-nr=2 1MiB 8.72M/s 512KiB 8.81M/s 256KiB 8.55M/s 128KiB 8.71M/s 64KiB 8.59M/s 32KiB 8.15M/s 16KiB 6.5M/s 8KiB 4.13M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --random --open-au-nr=3 1MiB 1.7M/s 512KiB 1.31M/s 256KiB 936K/s 128KiB 635K/s 64KiB 384K/s 32KiB 360K/s 16KiB 364K/s 8KiB 2.15M/s ## 2 open-au random andrew@brick:~/git/flashbench$ sudo ./flashbench --find-fat --erasesize=$[1024*1024] /dev/mmcblk0 1MiB 5.03M/s 4.93M/s 4.92M/s 6.34M/s 7.43M/s 7.46M/s 512KiB 6.91M/s 6.23M/s 6.18M/s 5.04M/s 6.23M/s 6.25M/s 256KiB 5.06M/s 6.2M/s 6.25M/s 4.94M/s 6.14M/s 6.2M/s 128KiB 5.04M/s 6.19M/s 6.19M/s 4.99M/s 6.2M/s 6.23M/s 64KiB 4.95M/s 6.19M/s 6.12M/s 4.99M/s 6.15M/s 6.26M/s 32KiB 4.16M/s 4.89M/s 4.79M/s 5.79M/s 7.63M/s 8.41M/s 16KiB 6.57M/s 6.52M/s 6.57M/s 6.58M/s 6.52M/s 6.45M/s andrew@brick:~/git/flashbench$ sudo ./flashbench --find-fat --erasesize=$[1024*1024] --fat-nr=16 /dev/mmcblk0 1MiB 5.08M/s 4.94M/s 4.9M/s 6.36M/s 7.45M/s 7.57M/s 6.4M/s 6.03M/s 6.24M/s 5.44M/s 6.27M/s 6.17M/s 5.47M/s 6.25M/s 6.17M/s 5.36M/s 512KiB 6.04M/s 6.21M/s 7.21M/s 4.08M/s 2.82M/s 4.09M/s 4.64M/s 5.3M/s 6.04M/s 6.23M/s 5.46M/s 6.23M/s 6.19M/s 5.39M/s 6.26M/s 6.14M/s 256KiB 5.4M/s 6.27M/s 6.27M/s 3.85M/s 2.84M/s 4.02M/s 4.78M/s 5.17M/s 6.26M/s 6.21M/s 5.47M/s 6.17M/s 6.26M/s 5.4M/s 6.2M/s 6.27M/s 128KiB 4.66M/s 6.27M/s 6.21M/s 3.89M/s 2.79M/s 4.15M/s 4.71M/s 5.31M/s 6.19M/s 6.24M/s 5.46M/s 6.05M/s 6.25M/s 5.51M/s 6.24M/s 6.21M/s 64KiB 5.44M/s 6.24M/s 6.13M/s 3.79M/s 2.82M/s 4.06M/s 4.71M/s 5.26M/s 6.28M/s 6.27M/s 5.42M/s 6.21M/s 6.27M/s 5.45M/s 6.15M/s 6.24M/s 32KiB 4.38M/s 4.71M/s 4.83M/s 6.78M/s 8.47M/s 8.43M/s 8.44M/s 8.14M/s 8.28M/s 8.66M/s 8.85M/s 8.36M/s 3.9M/s 2.77M/s 4.15M/s 4.7M/s 16KiB 2.46M/s 3.57M/s 5.92M/s 6.44M/s 6.43M/s 6.38M/s 6.4M/s 6.43M/s 6.43M/s 6.84M/s 6.83M/s 6.86M/s 4.89M/s 3.35M/s 3.28M/s 4.76M/s ## No special fat area really stands out

12 years, 3 months

Samsung MB-MS4GB 4 GB microSDHC

by Andrew Bradford

andrew@brick:~/git/flashbench$ head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 1b534d30303030301091ce109c00d500 ==> /sys/block/mmcblk0/device/csd <== 400e00325b5900001d4d7f800a400000 ==> /sys/block/mmcblk0/device/date <== 05/2013 ==> /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 <== 0235000000000000 ==> /sys/block/mmcblk0/device/serial <== 0x91ce109c ==> /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 andrew@brick:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0 Disk /dev/mmcblk0: 3933 MB, 3933208576 bytes, 7682048 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 label type: dos Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/mmcblk0p1 8192 7682047 3836928 b W95 FAT32 andrew@brick:~/git/flashbench$ factor 3933208576 3933208576: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 11 11 31 andrew@brick:~/git/flashbench$ sudo ./flashbench -a /dev/mmcblk0 --blocksize=1024 --count=100 align 1073741824 pre 336µs on 423µs post 408µs diff 50.8µs align 536870912 pre 341µs on 424µs post 417µs diff 45.4µs align 268435456 pre 330µs on 410µs post 405µs diff 42.8µs align 134217728 pre 324µs on 399µs post 407µs diff 33.5µs align 67108864 pre 325µs on 399µs post 408µs diff 32.6µs align 33554432 pre 325µs on 399µs post 407µs diff 32.8µs align 16777216 pre 325µs on 399µs post 408µs diff 32.4µs align 8388608 pre 331µs on 416µs post 415µs diff 42.7µs align 4194304 pre 340µs on 424µs post 425µs diff 41.6µs align 2097152 pre 341µs on 430µs post 422µs diff 48.9µs align 1048576 pre 337µs on 430µs post 427µs diff 48µs align 524288 pre 340µs on 402µs post 423µs diff 21µs align 262144 pre 335µs on 402µs post 426µs diff 21.2µs align 131072 pre 339µs on 402µs post 421µs diff 21.4µs align 65536 pre 336µs on 402µs post 426µs diff 20.8µs align 32768 pre 339µs on 401µs post 423µs diff 20.2µs align 16384 pre 336µs on 401µs post 424µs diff 20.6µs align 8192 pre 336µs on 394µs post 418µs diff 17.5µs align 4096 pre 381µs on 377µs post 370µs diff 877ns align 2048 pre 405µs on 400µs post 394µs diff 1.01µs ## 1 MiB erase blocks andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --open-au-nr=1 1MiB 3.07M/s 512KiB 4.7M/s 256KiB 8.76M/s 128KiB 8.59M/s 64KiB 5.31M/s 32KiB 3.01M/s 16KiB 6.89M/s 8KiB 4.46M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --open-au-nr=2 1MiB 8.93M/s 512KiB 8.88M/s 256KiB 8.91M/s 128KiB 8.91M/s 64KiB 8.8M/s 32KiB 8.53M/s 16KiB 6.77M/s 8KiB 4.43M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --open-au-nr=3 1MiB 3.02M/s 512KiB 1.87M/s 256KiB 1.19M/s 128KiB 630K/s 64KiB 406K/s 32KiB 408K/s 16KiB 398K/s 8KiB 2.09M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --random --open-au-nr=1 1MiB 9.01M/s 512KiB 8.97M/s 256KiB 1.72M/s 128KiB 8.94M/s 64KiB 8.91M/s 32KiB 8.72M/s 16KiB 7.04M/s 8KiB 4.59M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --random --open-au-nr=2 1MiB 8.2M/s 512KiB 8.95M/s 256KiB 8.89M/s 128KiB 8.86M/s 64KiB 8.67M/s 32KiB 8.35M/s 16KiB 6.64M/s 8KiB 4.22M/s andrew@brick:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --erasesize=$[1024*1024] --blocksize=$[8*1024] --random --open-au-nr=3 1MiB 1.81M/s 512KiB 1.45M/s 256KiB 1.02M/s 128KiB 689K/s 64KiB 439K/s 32KiB 390K/s 16KiB 397K/s 8KiB 2.46M/s ## 2 open-au linear and random andrew@brick:~/git/flashbench$ sudo ./flashbench --find-fat --erasesize=$[1024*1024] --fat-nr=16 /dev/mmcblk0 1MiB 1.75M/s 8.97M/s 8.8M/s 1.7M/s 5.05M/s 5.5M/s 6.44M/s 6.57M/s 6.43M/s 6.4M/s 6.67M/s 6.36M/s 6.5M/s 6.67M/s 6.33M/s 6.45M/s 512KiB 6.47M/s 6.36M/s 8.92M/s 4.34M/s 2.97M/s 4.66M/s 5.03M/s 6.03M/s 6.57M/s 6.65M/s 6.26M/s 6.65M/s 6.57M/s 6.32M/s 6.68M/s 6.49M/s 256KiB 6.21M/s 6.62M/s 6.61M/s 4.3M/s 2.97M/s 4.57M/s 4.98M/s 5.99M/s 6.65M/s 6.65M/s 6.28M/s 6.53M/s 6.66M/s 6.19M/s 6.53M/s 6.63M/s 128KiB 6.07M/s 6.52M/s 6.62M/s 4.35M/s 2.95M/s 4.4M/s 5.01M/s 5.9M/s 6.6M/s 6.51M/s 6.14M/s 6.6M/s 6.67M/s 6.24M/s 6.67M/s 6.68M/s 64KiB 6.14M/s 6.6M/s 6.61M/s 4.42M/s 2.96M/s 4.35M/s 4.98M/s 5.88M/s 6.49M/s 6.58M/s 6.13M/s 6.53M/s 6.47M/s 6.18M/s 6.56M/s 6.48M/s 32KiB 4.8M/s 4.98M/s 4.99M/s 7.08M/s 8.27M/s 7.97M/s 7.63M/s 8.17M/s 8.23M/s 8.34M/s 8.41M/s 8.11M/s 4.08M/s 2.91M/s 4.57M/s 4.86M/s 16KiB 2.65M/s 3.71M/s 6.54M/s 6.54M/s 6.51M/s 6.6M/s 6.68M/s 6.52M/s 6.53M/s 6.79M/s 6.83M/s 7M/s 5.19M/s 3.45M/s 3.38M/s 5.21M/s

12 years, 3 months

flashbench-results金牌店长特训营05:56:43

by 王丽

12 years, 3 months

flashbench-results精英训练营05:11:07

by 田亮

12 years, 3 months

Sandisk Cruzer 32G

by Jean-René Reinhard

Tests for Sandisk 32G usb flash drive. $ lsusb Bus 002 Device 003: ID 0781:5530 SanDisk Corp. Cruzer $ fdisk -l /dev/sdc Disk /dev/sdc: 32.0 GB, 32015679488 bytes 255 têtes, 63 secteurs/piste, 3892 cylindres, total 62530624 secteurs Unités = secteurs de 1 * 512 = 512 octets Taille de secteur (logique / physique) : 512 octets / 512 octets taille d'E/S (minimale / optimale) : 512 octets / 512 octets Identifiant de disque : 0x00000000 Périphérique Amorce Début Fin Blocs Id Système /dev/sdc1 * 32 62530623 31265296 c W95 FAT32 (LBA) $ ./flashbench -a /dev/sdc --blocksize=1024 align 8589934592 pre 931µs on 1.44ms post 811µs diff 565µs align 4294967296 pre 894µs on 1.58ms post 770µs diff 750µs align 2147483648 pre 878µs on 1.59ms post 791µs diff 756µs align 1073741824 pre 946µs on 1.75ms post 896µs diff 825µs align 536870912 pre 942µs on 1.69ms post 909µs diff 766µs align 268435456 pre 901µs on 1.58ms post 851µs diff 708µs align 134217728 pre 937µs on 1.65ms post 882µs diff 741µs align 67108864 pre 902µs on 1.63ms post 842µs diff 760µs align 33554432 pre 898µs on 1.62ms post 842µs diff 751µs align 16777216 pre 878µs on 1.63ms post 911µs diff 737µs align 8388608 pre 884µs on 1.62ms post 890µs diff 734µs align 4194304 pre 858µs on 1.42ms post 786µs diff 597µs align 2097152 pre 869µs on 923µs post 882µs diff 47.6µs align 1048576 pre 879µs on 917µs post 866µs diff 45µs align 524288 pre 844µs on 881µs post 844µs diff 37µs align 262144 pre 842µs on 890µs post 846µs diff 45.9µs align 131072 pre 839µs on 884µs post 846µs diff 41.6µs align 65536 pre 846µs on 880µs post 829µs diff 42.6µs align 32768 pre 841µs on 897µs post 841µs diff 55.7µs align 16384 pre 842µs on 878µs post 884µs diff 14.7µs align 8192 pre 843µs on 854µs post 844µs diff 10µs align 4096 pre 846µs on 848µs post 845µs diff 2.42µs align 2048 pre 845µs on 846µs post 846µs diff 658ns $ ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256* 1024] /dev/sdc --open-au-nr=7 4MiB 23M/s 2MiB 22.8M/s 1MiB 22.8M/s 512KiB 22.5M/s 256KiB 21.5M/s $ ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256* 1024] /dev/sdc --open-au-nr=8 4MiB 15.2M/s 2MiB 22.8M/s 1MiB 22.7M/s 512KiB 22.4M/s 256KiB 21.5M/s $ ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256* 1024] /dev/sdc --open-au-nr=9 4MiB 23M/s 2MiB 22.8M/s 1MiB 22.7M/s 512KiB 22.5M/s 256KiB 21.4M/s $ ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256* 1024] /dev/sdc --open-au-nr=10 4MiB 10.4M/s 2MiB 6.93M/s 1MiB 5.95M/s 512KiB 6.06M/s 256KiB 5.81M/s $ ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256* 1024] /dev/sdc --random --open-au-nr=9 4MiB 23M/s 2MiB 22.8M/s 1MiB 22.7M/s 512KiB 21.3M/s 256KiB 10.5M/s $ ./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256* 1024] /dev/sdc --random --open-au-nr=10 4MiB 9.56M/s 2MiB 6.94M/s 1MiB 3.92M/s 512KiB 3.82M/s 256KiB 2.23M/s $ ./flashbench -f /dev/sdc --erasesize=$[4* 1024 * 1024] --blocksize=512 --random 4MiB 22.9M/s 23.1M/s 22.9M/s 23.1M/s 23.2M/s 23.2M/s 2MiB 23.2M/s 23.1M/s 23.1M/s 23.1M/s 23.1M/s 23M/s 1MiB 23M/s 23M/s 23M/s 23M/s 23M/s 22.9M/s 512KiB 21.5M/s 21.5M/s 21.6M/s 21.6M/s 21.5M/s 21.4M/s 256KiB 10.6M/s 10.7M/s 10.6M/s 10.6M/s 10.6M/s 10.6M/s 128KiB 2.89M/s 2.9M/s 2.85M/s 2.89M/s 2.9M/s 2.89M/s 64KiB 1.2M/s 1.21M/s 1.2M/s 1.2M/s 1.2M/s 1.2M/s 32KiB 601K/s 604K/s 603K/s 601K/s 604K/s 601K/s 16KiB 305K/s 306K/s 305K/s 304K/s 305K/s 304K/s 8KiB 1.62M/s 1.65M/s 1.64M/s 1.65M/s 1.64M/s 1.65M/s 4KiB 1.45M/s 1.46M/s 1.46M/s 1.45M/s 1.44M/s 1.43M/s 2KiB 729K/s 729K/s 722K/s 733K/s 732K/s 726K/s 1KiB 366K/s 365K/s 366K/s 364K/s 365K/s 362K/s 512B 172K/s 172K/s 171K/s 172K/s 171K/s 169K/s # For completeness sake $ ./flashbench -f /dev/sdc --erasesize=$[1024 * 1024] --blocksize=512 --random 1MiB 21M/s 22M/s 21.8M/s 23.2M/s 22M/s 21.9M/s 512KiB 20.7M/s 20.2M/s 15.2M/s 21.3M/s 21.2M/s 19.8M/s 256KiB 6.49M/s 7.91M/s 10.2M/s 6.66M/s 6.51M/s 18M/s 128KiB 3.36M/s 2.46M/s 4.96M/s 3.59M/s 3.37M/s 3.37M/s 64KiB 1.06M/s 1.45M/s 971K/s 1.15M/s 1.05M/s 1.39M/s 32KiB 633K/s 732K/s 566K/s 671K/s 633K/s 668K/s 16KiB 343K/s 327K/s 346K/s 339K/s 345K/s 341K/s 8KiB 1.05M/s 1.25M/s 1.18M/s 1.21M/s 985K/s 1.47M/s 4KiB 1.51M/s 1.56M/s 1.25M/s 1.55M/s 1.47M/s 1.35M/s 2KiB 816K/s 788K/s 793K/s 720K/s 809K/s 809K/s 1KiB 360K/s 390K/s 391K/s 363K/s 358K/s 388K/s 512B 172K/s 180K/s 172K/s 179K/s 172K/s 180K/s So my guess is erase block size = 4Mo, the page size seems to be 4K. Am I missing something? Are further test needed to characterize the USB stick? I plan to put an ext4 and a VFAT partition on this usb stick. Do I need to take steps further than ensuring an alignment of 4M boundaries to ensure proper use (e.g., adapt pagesize or cluster size of the filesystems)? Also, I wonder why -f tests show such poor performance for 32Kib and 16Kib and 8Kib compared to 4Kib. Best wishes, Jean-René Reinhard

12 years, 4 months