Flashbench-results

flashbench-results@lists.linaro.org

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620 discussions

by Martin Steigerwald

I am not subscribed to linaro-dev, so please Cc me in case you drop flashbench-results mailinglist from receivers. Hi Arnd, hi everyone! For now quick and short. A simple script to automate common steps on reporting flash medium test results. It goes as far as read tests for erase block size and then suggests some open au tests together with a warning that these write to the device. I checked other flashbench-results posts as to what info would be interesting. Find it at: git://gitorious.org/flashbench/flashbench.git Example output is at: [Flashbench] Samsung Plus MB-SPAGFFP Class 10 SDHC 16GB Sat Dec 1 16:02:18 UTC 2012 http://lists.linaro.org/pipermail/flashbench-results/2012-December/000346.h… Sorry that I occupied flashbench upstream name for project. I can look into renaming it to "flashbench-martin" or something like that. The script is in branch "flashreport". In branch "defaultblocksize" you find a currently untested patch for changing default block size to 1024. I can try to send patches as mails via git, but I´d have to look it up first, since I do this quite rarely. Up to then please use the repo urls :) Nice weekend, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7

10 years, 8 months

Samsung Memory MB-MP64D 64GB EVO MicroSDXC UHS-I Grade Class 10 MicroSDXC

by Martin Steigerwald

Hello! Three runs of my flashreport script[1] which uses flashbench as well as the open au benchmarks it suggested but additionally with report preferred erase block size as well. It seems pretty clear to me from the factory partitioning and the benchmark results that the device prefers an erase block size of large 16 MiB. But even with the reported default erase block size it seems to work quite well. Do you agree with this interpretation? I am not sure about the open au numbers as benchmark results do not vary much. It appears to me that it seems to slightly prefer lower open au numbers like 3 or 5 seem to be slightly preferable. For the intended use in Sandisk e260v1 with Rockbox open au numbers would not matter anyway as they are only setable with F2FS I think. The card indeed does work in it, reformatted to FAT32 (from ExFAT) and with partition type 0xc. I re-used the manufacturer partitioning. The included SD adapter from Samsung seems to have contact issues with SD card slot in ThinkPad T520. An Intenso I already had here one has no such issues. Except from kern.log: Aug 31 10:37:04 merkaba kernel: [215894.957529] mmc0: card 0001 removed Aug 31 10:37:06 merkaba kernel: [215896.457997] mmc0: new high speed SDXC card at address 0001 Aug 31 10:37:06 merkaba kernel: [215896.458528] mmcblk0: mmc0:0001 00000 58.5 GiB Aug 31 10:37:06 merkaba kernel: [215896.460570] mmc0: Got data interrupt 0x00200000 even though no data operation was in progress. Aug 31 10:37:06 merkaba kernel: [215896.460717] mmcblk0: error -110 sending status command, retrying Aug 31 10:37:06 merkaba kernel: [215896.460768] mmcblk0: error -110 sending status command, retrying Aug 31 10:37:06 merkaba kernel: [215896.460820] mmcblk0: error -110 sending status command, aborting Aug 31 10:37:06 merkaba kernel: [215896.460833] blk_update_request: 8 callbacks suppressed Aug 31 10:37:06 merkaba kernel: [215896.460837] end_request: I/O error, dev mmcblk0, sector 0 Aug 31 10:37:06 merkaba kernel: [215896.460842] quiet_error: 8 callbacks suppressed Aug 31 10:37:06 merkaba kernel: [215896.460846] Buffer I/O error on device mmcblk0, logical block 0 Aug 31 10:37:06 merkaba kernel: [215896.470999] mmc0: Controller never released inhibit bit(s). Aug 31 10:37:06 merkaba kernel: [215896.471207] mmcblk0: error -5 sending status command, retrying Aug 31 10:37:06 merkaba kernel: [215896.471272] mmcblk0: error -110 sending status command, retrying Aug 31 10:37:06 merkaba kernel: [215896.471324] mmcblk0: error -110 sending status command, aborting Aug 31 10:37:06 merkaba kernel: [215896.471337] end_request: I/O error, dev mmcblk0, sector 0 Aug 31 10:37:06 merkaba kernel: [215896.471343] Buffer I/O error on device mmcblk0, logical block 0 Aug 31 10:37:06 merkaba kernel: [215896.481525] mmc0: Controller never released inhibit bit(s). Aug 31 10:37:06 merkaba kernel: [215896.481678] mmcblk0: error -5 sending status command, retrying Aug 31 10:37:06 merkaba kernel: [215896.481742] mmcblk0: error -110 sending status command, retrying Aug 31 10:37:06 merkaba kernel: [215896.481796] mmcblk0: error -110 sending status command, aborting Aug 31 10:37:06 merkaba kernel: [215896.481809] end_request: I/O error, dev mmcblk0, sector 0 If I really insert it slowly and press it till the arrester it seems to work, but I rather prefer the Intenso adapter for now. Benchmark results follow: ===== Benchmarks in ThinkPad T520 internal SD card reader ===== merkaba:~> lspci -nn | grep MMC 0d:00.0 System peripheral [0880]: Ricoh Co Ltd MMC/SD Host Controller [1180:e822] (rev 08) merkaba:~> tail -fn0 /var/log/kern.log Aug 31 10:34:58 merkaba kernel: [215768.587240] mmc0: card 0001 removed Aug 31 10:35:50 merkaba kernel: [215820.887063] mmc0: new high speed SDXC card at address 0001 Aug 31 10:35:50 merkaba kernel: [215820.887507] mmcblk0: mmc0:0001 00000 58.5 GiB Aug 31 10:35:50 merkaba kernel: [215820.888892] mmcblk0: p1 Device has 62881005568 bytes: martin@merkaba:~> factor 62881005568 62881005568: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 937 === First run of flashreport script === martin@merkaba:~/[…]/flashbench> ./flashreport /dev/mmcblk0 ===> MMC card detected with erase block size of 524288 bytes <=== ==> find /sys/block/mmcblk0/device/ -maxdepth 1 -type f | xargs head <== ==> /sys/block/mmcblk0/device/cid <== 1b534d303030303010f216606c00e300 ==> /sys/block/mmcblk0/device/csd <== 400e00325b590001d47f7f800a404000 ==> /sys/block/mmcblk0/device/scr <== 02c5800300000000 ==> /sys/block/mmcblk0/device/date <== 03/2014 ==> /sys/block/mmcblk0/device/name <== 00000 ==> /sys/block/mmcblk0/device/type <== SD ==> /sys/block/mmcblk0/device/preferred_erase_size <== 16777216 ==> /sys/block/mmcblk0/device/fwrev <== 0x0 ==> /sys/block/mmcblk0/device/hwrev <== 0x1 ==> /sys/block/mmcblk0/device/oemid <== 0x534d ==> /sys/block/mmcblk0/device/manfid <== 0x00001b ==> /sys/block/mmcblk0/device/serial <== 0xf216606c ==> /sys/block/mmcblk0/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=00000 MODALIAS=mmc:block ==> /sys/block/mmcblk0/device/erase_size <== 512 ==> fdisk -lu <== [sudo] password for martin: Disk /dev/mmcblk0: 58.6 GiB, 62881005568 bytes, 122814464 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 Disklabel type: dos Disk identifier: 0x00000000 Device Boot Start End Sectors Size Id Type /dev/mmcblk0p1 32768 122814463 122781696 58.6G 7 HPFS/NTFS/exFAT ==> sfdisk -d <== # partition table of /dev/mmcblk0 unit: sectors /dev/mmcblk0p1 : start= 32768, size=122781696, Id= 7 /dev/mmcblk0p2 : start= 0, size= 0, Id= 0 /dev/mmcblk0p3 : start= 0, size= 0, Id= 0 /dev/mmcblk0p4 : start= 0, size= 0, Id= 0 ===> Partition details <=== ==> sudo file -sk /dev/mmcblk0 <== /dev/mmcblk0: DOS/MBR boot sector; partition 1 : ID=0x7, start-CHS (0x2,10,9), end-CHS (0x3ff,254,63), startsector 32768, 122781696 sectors, extended partition table (last)\011 ==> sudo file -sk /dev/mmcblk0p1 <== /dev/mmcblk0p1: DOS/MBR boot sector ==> head -c20M | hexdump -C<== 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 0a |................| 000001c0 09 02 07 fe ff ff 00 80 00 00 00 80 51 07 00 00 |............Q...| 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 |................| * 01000000 eb 76 90 45 58 46 41 54 20 20 20 00 00 00 00 00 |.v.EXFAT .....| 01000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 01000040 00 80 00 00 00 00 00 00 00 80 51 07 00 00 00 00 |..........Q.....| 01000050 00 40 00 00 00 40 00 00 00 80 00 00 00 51 07 00 |.@...@.......Q..| 01000060 04 00 00 00 00 00 00 00 00 01 00 00 09 08 01 80 |................| 01000070 00 00 00 00 00 00 00 00 f4 f4 f4 f4 f4 f4 f4 f4 |................| 01000080 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 |................| * 010001f0 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 55 aa |..............U.| 01000200 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 010003f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01000400 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 010005f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01000600 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 010007f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01000800 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 010009f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01000a00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 01000bf0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01000c00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 01000df0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01000e00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 01000ff0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01001000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 010011f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01001200 46 7e 0c 0a 99 33 21 40 90 c8 fa 6d 38 9c 4b a2 |F~...3!@...m8.K.| 01001210 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 01001600 d3 f8 4a 22 d3 f8 4a 22 d3 f8 4a 22 d3 f8 4a 22 |..J"..J"..J"..J"| * 01001800 eb 76 90 45 58 46 41 54 20 20 20 00 00 00 00 00 |.v.EXFAT .....| 01001810 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 01001840 00 80 00 00 00 00 00 00 00 80 51 07 00 00 00 00 |..........Q.....| 01001850 00 40 00 00 00 40 00 00 00 80 00 00 00 51 07 00 |.@...@.......Q..| 01001860 04 00 00 00 00 00 00 00 00 01 00 00 09 08 01 80 |................| 01001870 00 00 00 00 00 00 00 00 f4 f4 f4 f4 f4 f4 f4 f4 |................| 01001880 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 |................| * 010019f0 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 55 aa |..............U.| 01001a00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 01001bf0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01001c00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 01001df0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01001e00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 01001ff0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01002000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 010021f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01002200 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 010023f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01002400 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 010025f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01002600 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 010027f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01002800 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 010029f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 01002a00 46 7e 0c 0a 99 33 21 40 90 c8 fa 6d 38 9c 4b a2 |F~...3!@...m8.K.| 01002a10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 01002e00 d3 f8 4a 22 d3 f8 4a 22 d3 f8 4a 22 d3 f8 4a 22 |..J"..J"..J"..J"| * 01003000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 01400000 ===> Trying to find erase block size by read tests <=== ==> sudo flashbench -a --count=100 --blocksize=1024 /dev/mmcblk0 <== align 17179869184 pre 439µs on 579µs post 277µs diff 221µs align 8589934592 pre 440µs on 580µs post 277µs diff 221µs align 4294967296 pre 437µs on 578µs post 274µs diff 223µs align 2147483648 pre 440µs on 580µs post 278µs diff 221µs align 1073741824 pre 440µs on 579µs post 277µs diff 221µs align 536870912 pre 440µs on 579µs post 277µs diff 221µs align 268435456 pre 439µs on 578µs post 277µs diff 221µs align 134217728 pre 446µs on 588µs post 286µs diff 222µs align 67108864 pre 444µs on 584µs post 282µs diff 221µs align 33554432 pre 414µs on 551µs post 275µs diff 207µs align 16777216 pre 422µs on 562µs post 287µs diff 207µs align 8388608 pre 280µs on 404µs post 281µs diff 124µs align 4194304 pre 284µs on 407µs post 279µs diff 126µs align 2097152 pre 291µs on 415µs post 291µs diff 124µs align 1048576 pre 295µs on 420µs post 291µs diff 127µs align 524288 pre 293µs on 417µs post 293µs diff 124µs align 262144 pre 287µs on 411µs post 282µs diff 127µs align 131072 pre 287µs on 411µs post 283µs diff 126µs align 65536 pre 287µs on 411µs post 291µs diff 122µs align 32768 pre 274µs on 397µs post 273µs diff 123µs align 16384 pre 274µs on 398µs post 274µs diff 124µs align 8192 pre 273µs on 273µs post 273µs diff 348ns align 4096 pre 281µs on 281µs post 281µs diff 136ns align 2048 pre 267µs on 267µs post 266µs diff 557ns (See README for an explaination on how to interpret the values.) Medium is a memory card which reports 524288 bytes as erase block size and 16777216 bytes as preferred erase size. ===> Suggestions for further benchmarking <=== Further tests can show the number of open erase blocks the medium can support. BEWARE: These tests write onto the device! Make a backup first! Further tests could look as follows: flashbench --open-au --open-au-nr=3 --erasesize=524288 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024] flashbench --open-au --open-au-nr=5 --erasesize=524288 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024] flashbench --open-au --open-au-nr=7 --erasesize=524288 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024] flashbench --open-au --open-au-nr=13 --erasesize=524288 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024] (Consult the README for further suggestions.) === Second run of flashreport script === martin@merkaba:~/…/flashbench> ./flashreport /dev/mmcblk0 ===> MMC card detected with erase block size of 524288 bytes <=== […] ===> Trying to find erase block size by read tests <=== ==> sudo flashbench -a --count=100 --blocksize=1024 /dev/mmcblk0 <== align 17179869184 pre 463µs on 602µs post 301µs diff 221µs align 8589934592 pre 462µs on 601µs post 299µs diff 221µs align 4294967296 pre 448µs on 588µs post 285µs diff 221µs align 2147483648 pre 467µs on 608µs post 304µs diff 223µs align 1073741824 pre 456µs on 595µs post 293µs diff 220µs align 536870912 pre 456µs on 596µs post 292µs diff 221µs align 268435456 pre 451µs on 593µs post 286µs diff 224µs align 134217728 pre 455µs on 594µs post 288µs diff 222µs align 67108864 pre 445µs on 585µs post 284µs diff 221µs align 33554432 pre 435µs on 573µs post 293µs diff 208µs align 16777216 pre 422µs on 560µs post 284µs diff 207µs align 8388608 pre 285µs on 409µs post 285µs diff 124µs align 4194304 pre 291µs on 416µs post 287µs diff 127µs align 2097152 pre 294µs on 417µs post 293µs diff 124µs align 1048576 pre 292µs on 416µs post 288µs diff 126µs align 524288 pre 287µs on 409µs post 285µs diff 124µs align 262144 pre 283µs on 407µs post 278µs diff 126µs align 131072 pre 285µs on 409µs post 280µs diff 126µs align 65536 pre 283µs on 407µs post 287µs diff 122µs align 32768 pre 289µs on 411µs post 288µs diff 123µs align 16384 pre 278µs on 402µs post 278µs diff 124µs align 8192 pre 282µs on 281µs post 281µs diff -523ns align 4096 pre 283µs on 283µs post 283µs diff 131ns align 2048 pre 286µs on 285µs post 285µs diff -817ns (See README for an explaination on how to interpret the values.) Medium is a memory card which reports 524288 bytes as erase block size and 16777216 bytes as preferred erase size. […] === Third run of flashreport script === martin@merkaba:~/…/flashbench> ./flashreport /dev/mmcblk0 […] ===> Trying to find erase block size by read tests <=== ==> sudo flashbench -a --count=100 --blocksize=1024 /dev/mmcblk0 <== align 17179869184 pre 457µs on 597µs post 295µs diff 221µs align 8589934592 pre 453µs on 593µs post 289µs diff 222µs align 4294967296 pre 463µs on 602µs post 299µs diff 221µs align 2147483648 pre 447µs on 586µs post 284µs diff 221µs align 1073741824 pre 450µs on 590µs post 286µs diff 222µs align 536870912 pre 451µs on 590µs post 286µs diff 221µs align 268435456 pre 446µs on 585µs post 283µs diff 221µs align 134217728 pre 449µs on 589µs post 285µs diff 222µs align 67108864 pre 453µs on 594µs post 291µs diff 222µs align 33554432 pre 420µs on 557µs post 280µs diff 206µs align 16777216 pre 423µs on 560µs post 284µs diff 207µs align 8388608 pre 284µs on 408µs post 283µs diff 124µs align 4194304 pre 291µs on 415µs post 286µs diff 127µs align 2097152 pre 286µs on 409µs post 285µs diff 124µs align 1048576 pre 290µs on 414µs post 286µs diff 126µs align 524288 pre 293µs on 419µs post 293µs diff 126µs align 262144 pre 287µs on 412µs post 283µs diff 127µs align 131072 pre 285µs on 408µs post 279µs diff 126µs align 65536 pre 301µs on 426µs post 305µs diff 123µs align 32768 pre 283µs on 408µs post 283µs diff 124µs align 16384 pre 279µs on 403µs post 278µs diff 124µs align 8192 pre 279µs on 279µs post 279µs diff 300ns align 4096 pre 280µs on 279µs post 279µs diff 133ns align 2048 pre 279µs on 279µs post 279µs diff 52ns (See README for an explaination on how to interpret the values.) Medium is a memory card which reports 524288 bytes as erase block size and 16777216 bytes as preferred erase size. […] Some open au write benchmarks. It seems to me: Either the Samsung rating of 48 MB/s is highly overrated or the cardreader is not UHS-1 capable. martin@merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=3 --erasesize=524288 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024] 512KiB 12.5M/s 256KiB 14M/s 128KiB 13.8M/s 64KiB 14.2M/s 32KiB 14.6M/s 16KiB 10.5M/s 8KiB 6.45M/s 4KiB 3.54M/s 2KiB 1.87M/s 1KiB 922K/s martin@merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=5 --erasesize=524288 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024] 512KiB 14M/s 256KiB 14.3M/s 128KiB 12.6M/s 64KiB 13.3M/s 32KiB 12.7M/s 16KiB 11.6M/s 8KiB 7.11M/s 4KiB 3.8M/s 2KiB 1.93M/s 1KiB 973K/s martin@merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=7 --erasesize=524288 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024] 512KiB 13.6M/s 256KiB 14M/s 128KiB 14.2M/s 64KiB 13.3M/s 32KiB 12.8M/s 16KiB 11.5M/s 8KiB 6.68M/s 4KiB 3.73M/s 2KiB 1.93M/s 1KiB 962K/s martin@merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=13 --erasesize=524288 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024] 512KiB 13.5M/s 256KiB 14M/s 128KiB 13.9M/s 64KiB 12.9M/s 32KiB 12.4M/s 16KiB 10.7M/s 8KiB 6.79M/s 4KiB 3.76M/s 2KiB 1.86M/s 1KiB 957K/s martin@merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=3 --erasesize=16777216 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024] 16MiB 14.1M/s 8MiB 13.6M/s 4MiB 13.5M/s 2MiB 13.6M/s 1MiB 13.4M/s 512KiB 13.3M/s 256KiB 13.1M/s 128KiB 12.9M/s 64KiB 12.9M/s 32KiB 13.1M/s 16KiB 10.4M/s 8KiB 6.37M/s 4KiB 3.6M/s 2KiB 1.83M/s 1KiB 948K/s martin@merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=5 --erasesize=16777216 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024] 16MiB 13.8M/s 8MiB 13.6M/s 4MiB 13.5M/s 2MiB 13.7M/s 1MiB 13.5M/s 512KiB 13.3M/s 256KiB 13.4M/s 128KiB 13M/s 64KiB 12.7M/s 32KiB 12.2M/s 16KiB 9.88M/s 8KiB 6.14M/s 4KiB 3.54M/s 2KiB 1.76M/s 1KiB 897K/s martin@merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=7 --erasesize=16777216 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024] 16MiB 13.7M/s 8MiB 13.6M/s 4MiB 13.6M/s 2MiB 13.4M/s 1MiB 13.4M/s 512KiB 13.1M/s 256KiB 13.3M/s 128KiB 13M/s 64KiB 12.8M/s 32KiB 12.2M/s 16KiB 9.91M/s 8KiB 6.18M/s 4KiB 3.54M/s 2KiB 1.76M/s 1KiB 914K/s martin@merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=13 --erasesize=16777216 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024] 16MiB 13.9M/s 8MiB 13.6M/s 4MiB 13.8M/s 2MiB 13.4M/s 1MiB 13.5M/s 512KiB 13.2M/s 256KiB 12.8M/s 128KiB 12M/s 64KiB 11M/s 32KiB 9.37M/s 16KiB 6.45M/s 8KiB 3.07M/s 4KiB 1.6M/s 2KiB 797K/s 1KiB 408K/s ===== Benchmarks in digisol 2.0 Multi Card Reader 5.1 ===== Seems to be a Transcend reader: merkaba:~> lsusb | grep Transcend Bus 002 Device 007: ID 1307:0330 Transcend Information, Inc. 63-in-1 Multi-Card Reader/Writer merkaba:~> tail -fn0 /var/log/kern.log Aug 31 10:51:49 merkaba kernel: [216779.647323] usb 2-1.1: new high-speed USB device number 7 using ehci-pci Aug 31 10:51:49 merkaba kernel: [216779.930706] usb 2-1.1: New USB device found, idVendor=1307, idProduct=0330 Aug 31 10:51:49 merkaba kernel: [216779.930721] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Aug 31 10:51:49 merkaba kernel: [216779.930728] usb 2-1.1: Product: Mass Storage Device Aug 31 10:51:49 merkaba kernel: [216779.930734] usb 2-1.1: Manufacturer: Generic Aug 31 10:51:49 merkaba kernel: [216779.930739] usb 2-1.1: SerialNumber: 00000000000006 Aug 31 10:51:49 merkaba kernel: [216779.931712] usb-storage 2-1.1:1.0: USB Mass Storage device detected Aug 31 10:51:49 merkaba kernel: [216779.931996] scsi host13: usb-storage 2-1.1:1.0 Aug 31 10:51:50 merkaba kernel: [216780.935185] scsi 13:0:0:0: Direct-Access Generic USB CF Reader 0.00 PQ: 0 ANSI: 2 Aug 31 10:51:50 merkaba kernel: [216780.935856] scsi 13:0:0:1: Direct-Access Generic USB SD Reader 0.00 PQ: 0 ANSI: 2 Aug 31 10:51:50 merkaba kernel: [216780.936529] scsi 13:0:0:2: Direct-Access Generic Mini SD Reader 0.00 PQ: 0 ANSI: 2 Aug 31 10:51:50 merkaba kernel: [216780.937054] scsi 13:0:0:3: Direct-Access Generic USB MS Reader 0.00 PQ: 0 ANSI: 2 Aug 31 10:51:50 merkaba kernel: [216780.937556] scsi 13:0:0:4: Direct-Access Generic USB SM Reader 0.00 PQ: 0 ANSI: 2 Aug 31 10:51:50 merkaba kernel: [216780.938602] sd 13:0:0:0: Attached scsi generic sg3 type 0 Aug 31 10:51:50 merkaba kernel: [216780.940382] sd 13:0:0:1: Attached scsi generic sg4 type 0 Aug 31 10:51:50 merkaba kernel: [216780.942365] sd 13:0:0:2: Attached scsi generic sg5 type 0 Aug 31 10:51:50 merkaba kernel: [216780.945763] sd 13:0:0:0: [sdc] Attached SCSI removable disk Aug 31 10:51:50 merkaba kernel: [216780.947310] sd 13:0:0:3: Attached scsi generic sg6 type 0 Aug 31 10:51:50 merkaba kernel: [216780.948245] sd 13:0:0:4: Attached scsi generic sg7 type 0 Aug 31 10:51:50 merkaba kernel: [216780.948512] sd 13:0:0:2: [sde] Attached SCSI removable disk Aug 31 10:51:50 merkaba kernel: [216780.949139] sd 13:0:0:1: [sdd] Attached SCSI removable disk Aug 31 10:51:50 merkaba kernel: [216780.952637] sd 13:0:0:3: [sdf] Attached SCSI removable disk Aug 31 10:51:50 merkaba kernel: [216780.954517] sd 13:0:0:4: [sdg] Attached SCSI removable disk merkaba:~> tail -fn0 /var/log/kern.log Aug 31 10:54:39 merkaba kernel: [216949.712566] sd 14:0:0:1: [sdd] 2048 512-byte logical blocks: (1.04 MB/1.00 MiB) Aug 31 10:54:39 merkaba kernel: [216949.717781] sdd: sdd1 Aug 31 10:54:39 merkaba kernel: [216949.717841] sdd: p1 start 32768 is beyond EOD, enabling native capacity Aug 31 10:54:39 merkaba kernel: [216949.721094] sdd: sdd1 Aug 31 10:54:39 merkaba kernel: [216949.721129] sdd: p1 start 32768 is beyond EOD, truncated Lol, can´t read this SDXC card it seems. :) [1] git@gitorious.org:flashbench-martin21/flashbench.git Thanks, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7

10 years, 8 months

Sandisk Extreme 16GB MicroSDHC - unclear results

by Marcel Partap

Salut, for housing a debian chroot in my android phone, I want to set up a 2.5G partition on this new micro sd card. For that, I want to figure out which parameters to give to mke2fs, as in > mkfs.ext4 -E stride=2,stripe-width=2048 -L debian_chroot /dev/sdb2 Now to figure out the internal erase block size, flashbench was recommended. But I can not quite make sense of my result.. > # fdisk.distrib -l /dev/sdb > > Disk /dev/sdb: 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: 0x000604f9 > > Device Boot Start End Blocks Id System > /dev/sdb1 2048 25890815 12944384 b W95 FAT32 > /dev/sdb2 25890816 31115263 2612224 83 Linux > # flashbench -va /dev/sdb --blocksize=1024 |(echo "align,pre [µs],on [µs],post [µs],diff [µs]" && sed -r 's/\w+ //g;s/\t/,/g;s/[0-9]+ns*/0/g;s/µs//g')|tee flashbench-16gb-sandisk-extreme-microsdhc-blocksize-1024.csv > # flashbench -va /dev/sdb --blocksize=$[3*1024] |(echo "align,pre [µs],on [µs],post [µs],diff [µs]" && sed -r 's/\w+ //g;s/\t/,/g;s/[0-9]+ns*/0/g;s/µs//g')|tee flashbench-16gb-sandisk-extreme-microsdhc-blocksize-$[3*1024].csv resulting CSV files attached.. I created a spreadsheet chart showing a drop.. does this mean the erasure block size is 128KB? That would give a stripe-width of 128KB/(2*4KB)=16? And I have not at all grokked the benefit/applicability of open-au/open-au-nr for practical purposes.. Any clarification greatly appreciated. #Regards!Marcel

10 years, 9 months

SanDisk Cruzer Fit 32 GB USB disk SDCZ33-032G-B35

by Andrew Bradford

andrew@boomboom:~/git/flashbench$ /sbin/fdisk -l /dev/sdc Disk /dev/sdc: 32.0 GB, 32015679488 bytes 255 heads, 63 sectors/track, 3892 cylinders, total 62530624 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/sdc1 32 62530623 31265296 c W95 FAT32 (LBA) andrew@boomboom:~/git/flashbench$ factor 32015679488 32015679488: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 13 17 4421 andrew@boomboom:~/git/flashbench$ sudo ./flashbench -a /dev/sdc --count=100 --blocksize=2048 [sudo] password for andrew: align 8589934592 pre 1.05ms on 1.29ms post 1ms diff 264µs align 4294967296 pre 1.02ms on 1.41ms post 1.01ms diff 398µs align 2147483648 pre 1.07ms on 1.43ms post 1.04ms diff 372µs align 1073741824 pre 1.03ms on 1.41ms post 1.01ms diff 384µs align 536870912 pre 1.06ms on 1.4ms post 994µs diff 371µs align 268435456 pre 1.02ms on 1.4ms post 1.01ms diff 386µs align 134217728 pre 1.06ms on 1.39ms post 1.01ms diff 358µs align 67108864 pre 1.03ms on 1.39ms post 998µs diff 378µs align 33554432 pre 1.03ms on 1.4ms post 993µs diff 390µs align 16777216 pre 1.02ms on 1.38ms post 1.01ms diff 370µs align 8388608 pre 1.05ms on 1.38ms post 1.01ms diff 349µs align 4194304 pre 1.02ms on 1.24ms post 979µs diff 241µs align 2097152 pre 1.04ms on 1.06ms post 1.03ms diff 26.2µs align 1048576 pre 1.03ms on 1.03ms post 1.02ms diff -766ns align 524288 pre 974µs on 1ms post 993µs diff 19.9µs align 262144 pre 1.01ms on 1.01ms post 999µs diff 11µs align 131072 pre 994µs on 1.01ms post 992µs diff 13.5µs align 65536 pre 996µs on 1.01ms post 997µs diff 8.89µs align 32768 pre 991µs on 1ms post 1ms diff 4.32µs align 16384 pre 1ms on 1.06ms post 1.06ms diff 28.1µs align 8192 pre 996µs on 1ms post 997µs diff 3.83µs align 4096 pre 997µs on 987µs post 980µs diff -801ns 4 MiB erase blocks andrew@boomboom:~/git/flashbench$ sudo ./flashbench /dev/sdc --open-au --blocksize=$[8*1024] --erasesize=$[4*1024*1024] --open-au-nr=1 4MiB 21.8M/s 2MiB 21.6M/s 1MiB 21.6M/s 512KiB 21.4M/s 256KiB 20.5M/s 128KiB 18.8M/s 64KiB 17.2M/s 32KiB 15.9M/s 16KiB 10.7M/s 8KiB 6.41M/s andrew@boomboom:~/git/flashbench$ sudo ./flashbench /dev/sdc --open-au --blocksize=$[8*1024] --erasesize=$[4*1024*1024] --open-au-nr=2 4MiB 21.7M/s 2MiB 21.6M/s 1MiB 21.4M/s 512KiB 21.2M/s 256KiB 20.2M/s 128KiB 18.5M/s 64KiB 16.9M/s 32KiB 14.9M/s 16KiB 10.1M/s 8KiB 5.83M/s andrew@boomboom:~/git/flashbench$ sudo ./flashbench /dev/sdc --open-au --blocksize=$[8*1024] --erasesize=$[4*1024*1024] --open-au-nr=4 4MiB 21.7M/s 2MiB 21.6M/s 1MiB 21.5M/s 512KiB 21.2M/s 256KiB 20.2M/s 128KiB 18.5M/s 64KiB 17M/s 32KiB 15M/s 16KiB 9.97M/s 8KiB 5.85M/s andrew@boomboom:~/git/flashbench$ sudo ./flashbench /dev/sdc --open-au --blocksize=$[8*1024] --erasesize=$[4*1024*1024] --open-au-nr=6 4MiB 19.4M/s 2MiB 21.5M/s 1MiB 21.4M/s 512KiB 21.2M/s 256KiB 20.1M/s 128KiB 18.4M/s 64KiB 16.7M/s 32KiB 14.6M/s 16KiB 9.77M/s 8KiB 5.71M/s andrew@boomboom:~/git/flashbench$ sudo ./flashbench /dev/sdc --open-au --blocksize=$[8*1024] --erasesize=$[4*1024*1024] --open-au-nr=7 4MiB 12.7M/s 2MiB 8.04M/s 1MiB 4.52M/s andrew@boomboom:~/git/flashbench$ sudo ./flashbench /dev/sdc --open-au --blocksize=$[8*1024] --erasesize=$[4*1024*1024] --random --open-au-nr=1 4MiB 21.8M/s 2MiB 21.6M/s 1MiB 21.5M/s 512KiB 20.4M/s 256KiB 9.96M/s 128KiB 2.71M/s 64KiB 1.12M/s 32KiB 564K/s 16KiB 285K/s 8KiB 132K/s andrew@boomboom:~/git/flashbench$ sudo ./flashbench /dev/sdc --find-fat 4MiB 21.8M/s 21.8M/s 21.7M/s 21.8M/s 9.03M/s 5.15M/s 2MiB 5.78M/s 21.2M/s 21.7M/s 21.6M/s 21.6M/s 21.6M/s 1MiB 21.4M/s 21.5M/s 21.5M/s 21.5M/s 21.5M/s 21.4M/s 512KiB 21.2M/s 21.3M/s 21.3M/s 21.3M/s 21.4M/s 21.4M/s 256KiB 20.4M/s 20.4M/s 20.4M/s 20.5M/s 20.5M/s 20.4M/s 128KiB 18.7M/s 18.8M/s 18.8M/s 18.8M/s 18.9M/s 18.7M/s 64KiB 16.9M/s 17M/s 17M/s 16.9M/s 16.9M/s 16.9M/s 32KiB 15.6M/s 15.1M/s 15.2M/s 15.6M/s 15.5M/s 15.2M/s 16KiB 10.2M/s 10.3M/s 10.3M/s 10.2M/s 10.2M/s 10.1M/s

11 years

Samsung Pro Series 16 GB SDHC MB-SGAGB

by Andrew Bradford

Another quite good Samsung card. root@localhost:~/flashbench# head /sys/block/mmcblk1/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk1/device/block <== ==> /sys/block/mmcblk1/device/cid <== 1b534d303030303010a46d02c100e127 ==> /sys/block/mmcblk1/device/csd <== 400e00325b590000773c7f800a40409b ==> /sys/block/mmcblk1/device/date <== 01/2014 ==> /sys/block/mmcblk1/device/driver <== ==> /sys/block/mmcblk1/device/erase_size <== 512 ==> /sys/block/mmcblk1/device/fwrev <== 0x0 ==> /sys/block/mmcblk1/device/hwrev <== 0x1 ==> /sys/block/mmcblk1/device/manfid <== 0x00001b ==> /sys/block/mmcblk1/device/name <== 00000 ==> /sys/block/mmcblk1/device/oemid <== 0x534d ==> /sys/block/mmcblk1/device/power <== ==> /sys/block/mmcblk1/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk1/device/scr <== 02b5800200000000 ==> /sys/block/mmcblk1/device/serial <== 0xa46d02c1 ==> /sys/block/mmcblk1/device/subsystem <== ==> /sys/block/mmcblk1/device/type <== SD ==> /sys/block/mmcblk1/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=00000 MODALIAS=mmc:block root@localhost:~/flashbench# fdisk -l /dev/mmcblk1 Disk /dev/mmcblk1: 16.0 GB, 16003891200 bytes 255 heads, 63 sectors/track, 1945 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/mmcblk1p1 1 1946 15624704 c W95 FAT32 (LBA) root@localhost:~/flashbench# factor 16003891200 16003891200: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 5 11 37 root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 -a --blocksize=1024 --count=100 align 4294967296 pre 350µs on 485µs post 350µs diff 135µs align 2147483648 pre 352µs on 486µs post 350µs diff 135µs align 1073741824 pre 354µs on 485µs post 348µs diff 135µs align 536870912 pre 351µs on 486µs post 349µs diff 136µs align 268435456 pre 353µs on 485µs post 353µs diff 132µs align 134217728 pre 352µs on 487µs post 350µs diff 136µs align 67108864 pre 351µs on 485µs post 352µs diff 133µs align 33554432 pre 351µs on 483µs post 349µs diff 133µs align 16777216 pre 350µs on 485µs post 349µs diff 136µs align 8388608 pre 347µs on 498µs post 361µs diff 144µs align 4194304 pre 377µs on 488µs post 363µs diff 118µs align 2097152 pre 378µs on 485µs post 360µs diff 116µs align 1048576 pre 352µs on 487µs post 361µs diff 130µs align 524288 pre 375µs on 487µs post 362µs diff 118µs align 262144 pre 378µs on 488µs post 363µs diff 117µs align 131072 pre 377µs on 476µs post 359µs diff 108µs align 65536 pre 376µs on 484µs post 360µs diff 117µs align 32768 pre 378µs on 489µs post 360µs diff 120µs align 16384 pre 350µs on 460µs post 351µs diff 110µs align 8192 pre 353µs on 356µs post 353µs diff 2.79µs align 4096 pre 358µs on 353µs post 353µs diff -2687ns align 2048 pre 358µs on 359µs post 358µs diff 771ns Might be 8 MiB erase blocks. root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --open-au-nr=1 8MiB 13.6M/s 4MiB 13.6M/s 2MiB 13.6M/s 1MiB 13.5M/s 512KiB 13.5M/s 256KiB 13.2M/s 128KiB 12.6M/s 64KiB 11.5M/s 32KiB 9.83M/s 16KiB 6.63M/s root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --open-au-nr=2 8MiB 13.6M/s 4MiB 13.7M/s 2MiB 13.6M/s 1MiB 13.6M/s 512KiB 13.4M/s 256KiB 13.2M/s 128KiB 12.6M/s 64KiB 11.4M/s 32KiB 9.87M/s 16KiB 6.66M/s root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --open-au-nr=7 8MiB 13.7M/s 4MiB 13.7M/s 2MiB 13.7M/s 1MiB 13.6M/s 512KiB 13.5M/s 256KiB 13.3M/s 128KiB 12.6M/s 64KiB 11.5M/s 32KiB 9.92M/s 16KiB 6.69M/s root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --open-au-nr=20 8MiB 13.7M/s 4MiB 13.7M/s 2MiB 13.7M/s 1MiB 13.6M/s 512KiB 13.5M/s 256KiB 13.3M/s 128KiB 12.6M/s 64KiB 11.5M/s 32KiB 9.99M/s 16KiB 6.72M/s root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --random --open-au-nr=20 8MiB 13.7M/s 4MiB 13.7M/s 2MiB 13.7M/s 1MiB 13.6M/s 512KiB 13.5M/s 256KiB 13.3M/s 128KiB 12.6M/s 64KiB 11.5M/s 32KiB 9.96M/s 16KiB 4.15M/s root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --find-fat 4MiB 13.3M/s 13.8M/s 13.7M/s 13.8M/s 13.6M/s 13.7M/s 2MiB 13.5M/s 13.6M/s 13.8M/s 13.8M/s 13.6M/s 13.8M/s 1MiB 13.7M/s 13.7M/s 13.7M/s 13.7M/s 13.6M/s 13.7M/s 512KiB 13.5M/s 13.5M/s 13.5M/s 13.6M/s 13.5M/s 13.6M/s 256KiB 13.3M/s 13.4M/s 13.1M/s 13.3M/s 13.3M/s 13.4M/s 128KiB 12.6M/s 12.6M/s 12.7M/s 12.7M/s 12.6M/s 12.7M/s 64KiB 11.5M/s 11.5M/s 11.5M/s 11.5M/s 11.5M/s 11.5M/s 32KiB 10M/s 9.92M/s 10.1M/s 9.93M/s 10M/s 10M/s 16KiB 6.74M/s 6.68M/s 6.76M/s 6.68M/s 6.73M/s 6.71M/s -Andrew

11 years

Kingston 4GB microSDHC SDC4

by Andrew Bradford

I tested this card, but an older one, 2 years back: http://lists.linaro.org/pipermail/flashbench-results/2012-February/000252.h… This is a newer one and is different. root@localhost:~# head /sys/block/mmcblk1/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk1/device/block <== ==> /sys/block/mmcblk1/device/cid <== 02544d5341303447113533890900d371 ==> /sys/block/mmcblk1/device/csd <== 400e00325b5900001d177f800a40008d ==> /sys/block/mmcblk1/device/date <== 03/2013 ==> /sys/block/mmcblk1/device/driver <== ==> /sys/block/mmcblk1/device/erase_size <== 512 ==> /sys/block/mmcblk1/device/fwrev <== 0x1 ==> /sys/block/mmcblk1/device/hwrev <== 0x1 ==> /sys/block/mmcblk1/device/manfid <== 0x000002 ==> /sys/block/mmcblk1/device/name <== SA04G ==> /sys/block/mmcblk1/device/oemid <== 0x544d ==> /sys/block/mmcblk1/device/power <== ==> /sys/block/mmcblk1/device/preferred_erase_size <== 4194304 ==> /sys/block/mmcblk1/device/scr <== 0235800001000000 ==> /sys/block/mmcblk1/device/serial <== 0x35338909 ==> /sys/block/mmcblk1/device/subsystem <== ==> /sys/block/mmcblk1/device/type <== SD ==> /sys/block/mmcblk1/device/uevent <== DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SA04G MODALIAS=mmc:block root@localhost:~/flashbench# fdisk -l /dev/mmcblk1 Disk /dev/mmcblk1: 3904 MB, 3904897024 bytes 4 heads, 16 sectors/track, 119168 cylinders Units = cylinders of 64 * 512 = 32768 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mmcblk1 doesn't contain a valid partition table root@localhost:~/flashbench# factor 3904897024 3904897024: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 7 7 19 root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=1 4MiB 6.45M/s 2MiB 5.19M/s 1MiB 5.19M/s 512KiB 5.1M/s 256KiB 5.15M/s 128KiB 5.14M/s 64KiB 5.1M/s 32KiB 4.94M/s 16KiB 3.71M/s root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=2 4MiB 3.88M/s 2MiB 5.19M/s 1MiB 5.12M/s 512KiB 5.06M/s 256KiB 4.99M/s 128KiB 4.77M/s 64KiB 4.64M/s 32KiB 4.53M/s 16KiB 3.38M/s root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=3 4MiB 4.47M/s 2MiB 5.19M/s 1MiB 5.17M/s 512KiB 5.12M/s 256KiB 4.96M/s 128KiB 4.77M/s 64KiB 4.65M/s 32KiB 4.49M/s 16KiB 3.36M/s root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --open-au-nr=4 4MiB 6.06M/s 2MiB 4.49M/s 1MiB 2.82M/s 512KiB 1.25M/s 256KiB 607K/s 128KiB 302K/s ^C root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=1 4MiB 3.07M/s 2MiB 2.13M/s 1MiB 3.24M/s 512KiB 1.44M/s 256KiB 1.76M/s 128KiB 1.91M/s 64KiB 1.36M/s 32KiB 1.18M/s 16KiB 1.2M/s root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=2 4MiB 3.03M/s 2MiB 2.58M/s 1MiB 3.26M/s 512KiB 1.44M/s 256KiB 1.75M/s 128KiB 1.9M/s 64KiB 1.36M/s 32KiB 1.17M/s 16KiB 1.18M/s root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=3 4MiB 3.03M/s 2MiB 2.78M/s 1MiB 3.25M/s 512KiB 1.44M/s 256KiB 1.76M/s 128KiB 1.9M/s 64KiB 1.36M/s 32KiB 1.18M/s 16KiB 1.19M/s root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --open-au --erasesize=$[4*1024*1024] --blocksize=$[16*1024] --random --open-au-nr=4 4MiB 3.33M/s 2MiB 2.92M/s 1MiB 2.48M/s 512KiB 1.2M/s 256KiB 595K/s 128KiB 298K/s 64KiB 150K/s ^C root@localhost:~/flashbench# ./flashbench /dev/mmcblk1 --find-fat --erasesize=$[4*1024*1024] 4MiB 865K/s 3.56M/s 3.01M/s 5.13M/s 5.14M/s 5.12M/s 2MiB 4.3M/s 4.88M/s 5.11M/s 5.16M/s 5.11M/s 5.3M/s 1MiB 3.99M/s 4.9M/s 5.23M/s 5.18M/s 5.17M/s 5.15M/s 512KiB 3.88M/s 4.81M/s 5.15M/s 5.16M/s 5.16M/s 5.15M/s 256KiB 4.35M/s 4.38M/s 5.17M/s 5.18M/s 5.17M/s 5.16M/s 128KiB 3.78M/s 4.8M/s 5.13M/s 5.12M/s 5.15M/s 5.14M/s 64KiB 4.27M/s 4.74M/s 5.08M/s 5.03M/s 5.08M/s 5.07M/s 32KiB 3.62M/s 4.29M/s 4.97M/s 4.96M/s 4.96M/s 4.95M/s 16KiB 3.01M/s 3.31M/s 3.74M/s 4.29M/s 4.3M/s 4.29M/s

11 years

eluted

by Treva Ihle

nd forsake Taitbout_, without being melted to tears. 'Eat, my kitten,' 'Drink, my lamb!' and such looks and endearments, and each so pleased with the other! One day he said to her: 'My kitten, your money does not bring you in what it ought; give me your scrip and in forty-eight hours I shall have doubled your capital.' She went softly to her cupboard and opening the glass doors, handed him her securities one by one with hands that trembled a little. "He took them unconcernedly and brought her a receipt the same evening bearing his uncle's signature. Three months after she was pocketing a very handsome income. The sixth month Adolphe disappeared. The old girl goes straight to the uncle with her screed of paper. 'I never signed that,' says the stockbroker, 'and my nephew never deposited any securities with me.' She flies like a mad-woman to the Commissary of Police, to learn that Adolphe, hammered at the Bourse, is off to Belgium, carrying with him a hundred and twenty thousand francs he had done another old woman out of. She never got over the blow; but we must say this of her, she brought up her daughter mighty strictly, and showed herself a very dragon of virtue. Poor Gabrielle must feel her cheeks burn to this day only to think of her years at the Conservatoire; for in those days her mother used to smack them soundly for her, morning and evening. Gabrielle, why I can see her now, in her sky-blue frock, running to lessons nibbling coffee-berries between her teeth. She was a good girl, that." "You knew her!" cried Jean, for whom these confidences formed the most exciti

11 years, 1 month

tarot

by Yurman Selin

Ing phase of romance; and our so-called re Ave you, dear, I will go. Denham. Yes--for God's sake, go! (_She moves towards the door._) But, Blanche, don't leave the house. I can't bear this alone. Mrs. Tremaine. (_returns to him_) You know, dear, I am yours always. Oh, don't hate me! I dare to say it in this presence. (_She kisses his hand. He shrinks from her._) Now I can go. (_She goes to the door and looks back as Denham kneels and clasps the body in his arms._) Will he hate me now? (_Exit Mrs. Tremaine._) Denham. Constance! I meant to have kept you from all the thorns of life! It was fate! It was fate! CURTAIN. * * * * * Printed by Hazell, Watson, and Viney, Ld., London and Aylesbury. =THE INDEPENDENT THEATRE SERIES OF PLAYS.= EDITED BY J.T. GREIN. _Crown 8vo, 2s. 6d. net._ * * * * * The undermentioned are now ready:-- I. =WIDOWERS' HOUSES=. By GEORGE BERNARD SHAW, with a Preface by the Author, an Address to Dramatic Critics, and an Appendix treating of the discussion raised by the performance. II. =ALAN'S WIFE=. Anonymous. With a Preface by WILLIAM ARCHER. III. =THE HEIRS OF RABOURDIN=. By EMILE ZOLA. Translated by A. TEIXEIRA DE MATTOS. With a Preface by the Author. IV. =THE BLACK CAT=. By Dr. TODHUNTER. With an Introduction by the Author. * * * * * =DRAMA.= I. =THE GARDEN OF CITRONS=. By EMILIO MONTANARO. Translated by J.T. GREIN. With a Preface by JOHN GRAY. Paper Covers, 1s. net. II. =TWO PLAYS=. By MEYRICK MILTON. With a Preface by the Author. Crown 8vo, 2s. 6d. net. =ASK TO SEE A SPECIMEN COPY.= _NOW PUBLISHING._ THE NEW ART SERIAL. The Most Exhaustive Work ever Published. THE HISTORY OF MODERN PAINTING _OVER 2,300 PAGES AND 1,300 ILLUSTRATIONS._ Describes and Illustrates the Art of =ENGLAND=, =NORWAY & SWEDEN=, =HOLLAND=, =JAPAN=, =FRANCE=, =SCOTLAND=, =RUSSIA=, =BELGIUM=, =SPAIN=, =GERMANY=, =AMERICA=, =ITALY=, Etc. In 36 Monthly Parts, 1s. net, or 16 Monthly Parts Half-a-Crown net. Also in 3 Volumes, cloth gilt, Imperial 8vo, L2 15s. net, and Half Morocco, Library Edition, L3 15s. net. =WRITE FOR ILLUSTRATED PROSPECTUS.= _NOW READY._ NEW NOVEL BY JOHN OLIVER HOBBES. =THE GODS, SOME MORTALS AND LORD WICKENHAM=. _By the Author of "Some Emotions and a Moral," "The Sinners' Comedy," etc._ IN ONE VOL., 6s. * * * * * BY JOCELYN QUILP. =BARON VERDIGRIS:= =A ROMANCE OF THE REVERSED DIRECTION.= WITH A FRONTISPIECE BY AUBREY BEARDSLEY. _Crown 8vo, 3s. 6d._ * * * * * By ANTHONY DEANE. =HOLIDAY RHYMES=. From "Punch," "Pall Mall," "St. James's," and "Westminster Gazettes," etc. _Crown

11 years, 1 month

32 GB SanDisk Extreme USB 3.0 (SDCZ80-032G)

by oxy diz

Labels on the stick: BM1312246878 SDCZ80-032G Made in China TAD-SDCZ80 D33724 http://www.sandisk.com/products/usb/drives/extreme/ # lsusb Bus 001 Device 027: ID 0781:5580 SanDisk Corp. SDCZ80 Flash Drive # hdparm -I /dev/sde /dev/sde: ATA device, with non-removable media Model Number: SanDisk pSSD Serial Number: 0b162fc61 Firmware Revision: 3 Transport: Serial, ATA8-AST, SATA Rev 2.6 Standards: Used: ATA-8-ACS revision 2d Supported: 8 7 6 5 Configuration: Logical max current cylinders 16383 16383 heads 16 16 sectors/track 63 63 -- CHS current addressable sectors: 16514064 LBA user addressable sectors: 61282631 LBA48 user addressable sectors: 61282631 Logical Sector size: 512 bytes Physical Sector size: 512 bytes device size with M = 1024*1024: 29923 MBytes device size with M = 1000*1000: 31376 MBytes (31 GB) cache/buffer size = unknown Form Factor: 1.8 inch Nominal Media Rotation Rate: Solid State Device Capabilities: LBA, IORDY(can be disabled) Queue depth: 32 Standby timer values: spec'd by Standard, no device specific minimum R/W multiple sector transfer: Max = 1 Current = 1 Advanced power management level: disabled DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=120ns IORDY flow control=120ns Commands/features: Enabled Supported: * SMART feature set Security Mode feature set * Power Management feature set Write cache Look-ahead * Host Protected Area feature set * WRITE_BUFFER command * READ_BUFFER command * NOP cmd * DOWNLOAD_MICROCODE Advanced Power Management feature set * 48-bit Address feature set * Device Configuration Overlay feature set * Mandatory FLUSH_CACHE * FLUSH_CACHE_EXT * SMART error logging * SMART self-test * General Purpose Logging feature set * WRITE_{DMA|MULTIPLE}_FUA_EXT * 64-bit World wide name * WRITE_UNCORRECTABLE_EXT command * Segmented DOWNLOAD_MICROCODE * Gen1 signaling speed (1.5Gb/s) * Gen2 signaling speed (3.0Gb/s) * Gen3 signaling speed (6.0Gb/s) * Native Command Queueing (NCQ) * Software settings preservation * DEVICE CONFIGURATION SET/IDENTIFY DMA commands * Data Set Management TRIM supported (limit 8 blocks) * Deterministic read ZEROs after TRIM Security: Master password revision code = 65534 supported not enabled not locked not frozen not expired: security count not supported: enhanced erase 2min for SECURITY ERASE UNIT. 2min for ENHANCED SECURITY ERASE UNIT. Logical Unit WWN Device Identifier: 5001b40062b161fc NAA : 5 IEEE OUI : 001b40 Unique ID : 062b161fc Checksum: correct # fdisk -lu /dev/sde Disk /dev/sde: 31.4 GB, 31376707072 bytes, 61282631 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/sde1 32 61282630 30641299+ c W95 FAT32 (LBA) This is vendor partitioning which now lost. Is FAT params was unique to my exemplar? Is there any sense to try get it from other owners? # ./flashbench -a /dev/sde --blocksize=1024 -c 128 align 8589934592 pre 467µs on 592µs post 595µs diff 61.1µs align 4294967296 pre 468µs on 608µs post 596µs diff 76µs align 2147483648 pre 473µs on 608µs post 591µs diff 76.4µs align 1073741824 pre 493µs on 655µs post 633µs diff 92µs align 536870912 pre 462µs on 588µs post 594µs diff 59.6µs align 268435456 pre 467µs on 598µs post 580µs diff 74.9µs align 134217728 pre 458µs on 612µs post 596µs diff 84.6µs align 67108864 pre 471µs on 612µs post 594µs diff 79.2µs align 33554432 pre 474µs on 591µs post 572µs diff 68.1µs align 16777216 pre 461µs on 584µs post 562µs diff 73µs align 8388608 pre 469µs on 584µs post 563µs diff 68.1µs align 4194304 pre 466µs on 584µs post 563µs diff 70µs align 2097152 pre 472µs on 586µs post 581µs diff 59.8µs align 1048576 pre 475µs on 593µs post 577µs diff 67.1µs align 524288 pre 465µs on 585µs post 562µs diff 72.2µs align 262144 pre 496µs on 617µs post 595µs diff 71.4µs align 131072 pre 452µs on 598µs post 594µs diff 74.8µs align 65536 pre 469µs on 476µs post 470µs diff 6.53µs align 32768 pre 535µs on 576µs post 570µs diff 23.7µs align 16384 pre 568µs on 576µs post 584µs diff -192ns align 8192 pre 578µs on 578µs post 585µs diff -4057ns align 4096 pre 581µs on 577µs post 580µs diff -2706ns align 2048 pre 581µs on 577µs post 564µs diff 4.36µs # ./flashbench -a /dev/sde --blocksize=$[8*1024] -c 96 --offset=$[240*1024*1024] align 8589934592 pre 687µs on 779µs post 819µs diff 26µs align 4294967296 pre 708µs on 793µs post 888µs diff -5055ns align 2147483648 pre 676µs on 798µs post 847µs diff 36.4µs align 1073741824 pre 703µs on 783µs post 854µs diff 4.35µs align 536870912 pre 634µs on 746µs post 821µs diff 19.2µs align 268435456 pre 621µs on 754µs post 787µs diff 50µs align 134217728 pre 662µs on 781µs post 842µs diff 28.2µs align 67108864 pre 652µs on 765µs post 839µs diff 18.7µs align 33554432 pre 658µs on 762µs post 830µs diff 18.2µs align 16777216 pre 654µs on 780µs post 839µs diff 33.3µs align 8388608 pre 664µs on 778µs post 827µs diff 32.9µs align 4194304 pre 668µs on 753µs post 819µs diff 9.58µs align 2097152 pre 654µs on 760µs post 849µs diff 8.98µs align 1048576 pre 661µs on 786µs post 826µs diff 42.4µs align 524288 pre 624µs on 751µs post 799µs diff 38.9µs align 262144 pre 645µs on 766µs post 834µs diff 26.4µs align 131072 pre 695µs on 795µs post 824µs diff 35.9µs align 65536 pre 739µs on 742µs post 685µs diff 30.1µs align 32768 pre 804µs on 795µs post 795µs diff -4158ns align 16384 pre 824µs on 825µs post 816µs diff 4.17µs # ./flashbench -a /dev/sde --blocksize=$[4*1024] -c 96 --offset=$[240*1024*1024] align 8589934592 pre 587µs on 704µs post 723µs diff 48.8µs align 4294967296 pre 599µs on 735µs post 748µs diff 62µs align 2147483648 pre 571µs on 761µs post 749µs diff 101µs align 1073741824 pre 593µs on 700µs post 691µs diff 58.3µs align 536870912 pre 559µs on 696µs post 710µs diff 61.7µs align 268435456 pre 565µs on 689µs post 703µs diff 55.1µs align 134217728 pre 515µs on 692µs post 698µs diff 85.1µs align 67108864 pre 569µs on 700µs post 701µs diff 65µs align 33554432 pre 555µs on 727µs post 713µs diff 93.2µs align 16777216 pre 569µs on 702µs post 699µs diff 67.9µs align 8388608 pre 539µs on 702µs post 711µs diff 76.9µs align 4194304 pre 575µs on 700µs post 696µs diff 64.5µs align 2097152 pre 564µs on 712µs post 708µs diff 76µs align 1048576 pre 566µs on 708µs post 707µs diff 71.8µs align 524288 pre 564µs on 692µs post 717µs diff 51.6µs align 262144 pre 538µs on 704µs post 716µs diff 76.8µs align 131072 pre 609µs on 737µs post 732µs diff 66.7µs align 65536 pre 637µs on 628µs post 571µs diff 23.9µs align 32768 pre 671µs on 724µs post 708µs diff 34.3µs align 16384 pre 700µs on 698µs post 698µs diff -1761ns align 8192 pre 713µs on 706µs post 691µs diff 4.35µs # ./flashbench -a /dev/sde --blocksize=$[8*1024] -c 96 --offset=$[240*1024*1024] align 8589934592 pre 674µs on 785µs post 849µs diff 23.6µs align 4294967296 pre 718µs on 817µs post 864µs diff 26.1µs align 2147483648 pre 666µs on 809µs post 855µs diff 48.9µs align 1073741824 pre 722µs on 784µs post 830µs diff 7.87µs align 536870912 pre 665µs on 762µs post 835µs diff 12µs align 268435456 pre 669µs on 772µs post 827µs diff 24.4µs align 134217728 pre 673µs on 780µs post 838µs diff 24.7µs align 67108864 pre 683µs on 777µs post 831µs diff 19.6µs align 33554432 pre 664µs on 779µs post 835µs diff 29.1µs align 16777216 pre 646µs on 780µs post 836µs diff 39.2µs align 8388608 pre 656µs on 772µs post 837µs diff 25.5µs align 4194304 pre 661µs on 770µs post 837µs diff 21.2µs align 2097152 pre 644µs on 773µs post 825µs diff 38.6µs align 1048576 pre 659µs on 770µs post 819µs diff 31.4µs align 524288 pre 644µs on 763µs post 816µs diff 33.9µs align 262144 pre 648µs on 774µs post 812µs diff 44.2µs align 131072 pre 688µs on 790µs post 830µs diff 30.8µs align 65536 pre 735µs on 745µs post 695µs diff 30.2µs align 32768 pre 784µs on 792µs post 794µs diff 2.74µs align 16384 pre 837µs on 839µs post 819µs diff 11.3µs Some of the flashbench test results which I performed in USB 2.0 port. They totally unclear for me. May be they useless because of USB 2 bottleneck... If so is there any way to discover under the hood of this stick with flashbench in USB2 port? USB 3.0 I do not have.

11 years, 1 month

Samsung MB-SPAGC 16 GB Plus Class 10 SDHC

by Andrew Bradford

Possibly 0.5 MiB erase block based on factored size. Doing open-au tests nets no useful data, it's always fast, so just a few examples at the bottom. andrew@lati:~/git/flashbench$ sudo fdisk -l /dev/mmcblk0 | grep Disk Disk /dev/mmcblk0: 15.7 GB, 15719727104 bytes Disk identifier: 0x00000000 andrew@lati:~/git/flashbench$ factor 15719727104 15719727104: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 29983 andrew@lati:~/git/flashbench$ head /sys/block/mmcblk0/device/* 2>/dev/null | grep -v ^$ ==> /sys/block/mmcblk0/device/block <== ==> /sys/block/mmcblk0/device/cid <== 1b534d3030303030107b156f8000d900 ==> /sys/block/mmcblk0/device/csd <== 400e00325b590000751e7f800a404000 ==> /sys/block/mmcblk0/device/date <== 09/2013 ==> /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 <== 02b5800200000000 ==> /sys/block/mmcblk0/device/serial <== 0x7b156f80 ==> /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@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 -a --blocksize=1024 align 4294967296 pre 292µs on 260µs post 245µs diff -8046ns align 2147483648 pre 308µs on 257µs post 231µs diff -12097n align 1073741824 pre 287µs on 251µs post 239µs diff -11574n align 536870912 pre 302µs on 253µs post 226µs diff -11129n align 268435456 pre 299µs on 263µs post 246µs diff -9463ns align 134217728 pre 309µs on 261µs post 234µs diff -10506n align 67108864 pre 293µs on 263µs post 244µs diff -5672ns align 33554432 pre 307µs on 257µs post 228µs diff -9952ns align 16777216 pre 289µs on 253µs post 241µs diff -12326n align 8388608 pre 227µs on 267µs post 231µs diff 38.4µs align 4194304 pre 232µs on 275µs post 230µs diff 43.3µs align 2097152 pre 229µs on 269µs post 225µs diff 42µs align 1048576 pre 223µs on 258µs post 222µs diff 35.8µs align 524288 pre 228µs on 266µs post 227µs diff 39.4µs align 262144 pre 226µs on 260µs post 223µs diff 35.2µs align 131072 pre 231µs on 266µs post 227µs diff 37µs align 65536 pre 220µs on 258µs post 220µs diff 38µs align 32768 pre 229µs on 266µs post 226µs diff 38.4µs align 16384 pre 232µs on 270µs post 235µs diff 36.2µs align 8192 pre 231µs on 231µs post 227µs diff 1.72µs align 4096 pre 221µs on 221µs post 220µs diff 319ns align 2048 pre 221µs on 224µs post 221µs diff 2.6µs andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --open-au-nr=1 8MiB 14.8M/s 4MiB 17.2M/s 2MiB 17.3M/s 1MiB 17.3M/s 512KiB 17.4M/s 256KiB 17.3M/s 128KiB 17.1M/s 64KiB 17M/s 32KiB 9.5M/s 16KiB 5.52M/s andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --open-au-nr=7 8MiB 11.1M/s 4MiB 10.8M/s 2MiB 11M/s 1MiB 12.3M/s 512KiB 12.3M/s 256KiB 15.8M/s 128KiB 17.1M/s 64KiB 16.9M/s 32KiB 7.48M/s 16KiB 6.54M/s andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --random --open-au-nr=1 8MiB 17.2M/s 4MiB 17.5M/s 2MiB 17.5M/s 1MiB 17M/s 512KiB 17.4M/s 256KiB 17.4M/s 128KiB 17.3M/s 64KiB 17.1M/s 32KiB 13.9M/s 16KiB 9.76M/s andrew@lati:~/git/flashbench$ sudo ./flashbench /dev/mmcblk0 --open-au --blocksize=$[16*1024] --erasesize=$[8*1024*1024] --random --open-au-nr=7 8MiB 17.4M/s 4MiB 17.4M/s 2MiB 17.4M/s 1MiB 17.3M/s 512KiB 17.3M/s 256KiB 17.2M/s 128KiB 17.1M/s 64KiB 16.9M/s 32KiB 13.7M/s 16KiB 9.62M/s

11 years, 2 months

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