Testing tool for managed flash memory devices, see the 'dev' branch for updates which aren't yet "upstream" and report your results to the flashbench-results mailing list ->
Home Page: http://lists.linaro.org/mailman/listinfo/flashbench-results
License: GNU General Public License v2.0
print_help() does not describe the following arguments:
If running the -a, open-au, and find-fat tests could be automated, that would be very helpful for getting new users over the hump of using flashbench and reporting results.
For example, the flow would be:
I'm having trouble building this arm native. I'm not very good at this so I may have made a mistake, is it possible?
NDK_ROOT=~/projects/android-crosscompile/android-ndk-r9
export PATH="$NDK_ROOT/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/:$PATH"
export SYS_ROOT="$NDK_ROOT/platforms/android-14/arch-arm/"
export CC="arm-linux-androideabi-gcc --sysroot=$SYS_ROOT"
export LD="arm-linux-androideabi-ld"
export AR="arm-linux-androideabi-ar"
export RANLIB="arm-linux-androideabi-ranlib"
export STRIP="arm-linux-androideabi-strip"
export LDFLAGS=--sysroot=$SYS_ROOT
export CFLAGS=--sysroot=$SYS_ROOT
flashbench $ make clean; make;
rm flashbench flashbench.o dev.o vm.o
rm: cannot remove ‘flashbench’: No such file or directory
rm: cannot remove ‘dev.o’: No such file or directory
rm: cannot remove ‘vm.o’: No such file or directory
make: *** [clean] Error 1
arm-linux-androideabi-gcc --sysroot=/home/weedy/projects/android-crosscompile/android-ndk-r9/platforms/android-14/arch-arm/ -O2 -Wall -Wextra -Wno-missing-field-initializers -Wno-unused-parameter -g2 -c -o flashbench.o flashbench.c
arm-linux-androideabi-gcc --sysroot=/home/weedy/projects/android-crosscompile/android-ndk-r9/platforms/android-14/arch-arm/ -O2 -Wall -Wextra -Wno-missing-field-initializers -Wno-unused-parameter -g2 -c -o dev.o dev.c
dev.c: In function 'time_erase':
dev.c:98:23: error: 'BLKDISCARD' undeclared (first use in this function)
dev.c:98:23: note: each undeclared identifier is reported only once for each function it appears in
dev.c: In function 'setup_dev':
dev.c:137:2: warning: implicit declaration of function 'posix_memalign' [-Wimplicit-function-declaration]
make: *** [dev.o] Error 1
./flashbench -a /dev/nvme0n1 --blocksize 1024
align 68719476736 pre 47.5µs on 48µs post 47.5µs diff 487ns
align 34359738368 pre 47.4µs on 48µs post 47.5µs diff 551ns
align 17179869184 pre 47.4µs on 48µs post 47.5µs diff 509ns
align 8589934592 pre 47.5µs on 48µs post 47.6µs diff 502ns
align 4294967296 pre 47.5µs on 48µs post 47.6µs diff 441ns
align 2147483648 pre 57.3µs on 56.9µs post 55.5µs diff 457ns
align 1073741824 pre 55.5µs on 57.4µs post 56.3µs diff 1.52µs
align 536870912 pre 55.7µs on 57.4µs post 56.1µs diff 1.5µs
align 268435456 pre 47.5µs on 48µs post 47.5µs diff 491ns
align 134217728 pre 47.5µs on 48µs post 47.5µs diff 532ns
align 67108864 pre 47.5µs on 48µs post 47.6µs diff 483ns
align 33554432 pre 47.5µs on 48µs post 47.5µs diff 557ns
align 16777216 pre 47.5µs on 48µs post 47.5µs diff 504ns
align 8388608 pre 55.5µs on 57.4µs post 56µs diff 1.63µs
align 4194304 pre 55.5µs on 57.5µs post 56.1µs diff 1.68µs
align 2097152 pre 57.1µs on 58.5µs post 57.3µs diff 1.29µs
align 1048576 pre 47.6µs on 57.4µs post 57.4µs diff 4.95µs
align 524288 pre 47.5µs on 48µs post 47.4µs diff 501ns
align 262144 pre 47.5µs on 48µs post 47.4µs diff 572ns
align 131072 pre 47.5µs on 47.9µs post 47.4µs diff 461ns
align 65536 pre 47.5µs on 47.9µs post 47.5µs diff 477ns
align 32768 pre 47.5µs on 48µs post 47.5µs diff 535ns
align 16384 pre 47.7µs on 49µs post 47.6µs diff 1.36µs
align 8192 pre 55.8µs on 57.4µs post 56.3µs diff 1.33µs
align 4096 pre 55.8µs on 57.4µs post 56.3µs diff 1.34µs
align 2048 pre 55.8µs on 56.2µs post 56.2µs diff 218ns
Intel product code: SSDPEKKW256G7X1
EAN: 5032037087766
UPC: 735858318259
I tried to run flashbench 62 (for Ubuntu repos) as user, only for it to fail with a cryptic error message:
geek@liv-inspiron:~$ flashbench -a /dev/sdb
sched_setscheduler: Operation not permitted
/dev/sdb: Operation not permitted
Then I attempted as root, and it worked OK.
It would be nice if flashbench inform user that it only works as root.
Please add in flashbench functionality to detect incorrect capacity of SD card, like this tool:
http://www.heise.de/software/download/h2testw/50539
which can be used to detect such cards, but works on Windows only.
I have built flashbanch at commit d783b1b with the make command, and running it as sudo ./flashbanch -a /dev/sda as the readme recommends results in the following:
align 34359738368 pre 986µs on 1.01ms post 1.87ms diff -412331
align 17179869184 pre 833µs on 1.19ms post 875µs diff 335µs
align 8589934592 pre 690µs on 1.01ms post 1.44ms diff -49389n
align 4294967296 pre 1.13ms on 1.43ms post 1.67ms diff 32.7µs
align 2147483648 pre 582µs on 935µs post 1.63ms diff -173123
align 1073741824 pre 1.21ms on 1.39ms post 1.61ms diff -18714n
align 536870912 pre 980µs on 1.1ms post 986µs diff 114µs
align 268435456 pre 650µs on 1.09ms post 1ms diff 263µs
align 134217728 pre 1.53ms on 1.53ms post 1.15ms diff 187µs
align 67108864 pre 3.42ms on 3.24ms post 1.97ms diff 549µs
align 33554432 pre 1.07ms on 1.18ms post 1.21ms diff 43.4µs
align 16777216 pre 1.31ms on 1.96ms post 2.01ms diff 299µs
align 8388608 pre 995µs on 1.2ms post 1.01ms diff 199µs
align 4194304 pre 3.38ms on 2.87ms post 1.07ms diff 641µs
align 2097152 pre 1.75ms on 1.59ms post 1.62ms diff -93720n
align 1048576 pre 1.04ms on 1.45ms post 1.44ms diff 210µs
align 524288 pre 956µs on 842µs post 1.56ms diff -416828
align 262144 pre 1.5ms on 1.51ms post 1.14ms diff 187µs
align 131072 pre 1.07ms on 941µs post 1.59ms diff -387973
align 65536 pre 1.64ms on 1.75ms post 1.34ms diff 256µs
align 32768 pre 1.42ms on 1.19ms post 1.7ms diff -371078
Multiple lines have negative values without a unit in the diff column
Using --count and --blocksize with different values does not help.
I have found a similar report 10 years ago on the linaro-dev mailing list, it did not get responses.
The test was run on a SanDisk Ultra microSDXC UHS-1 SD card, 128 GB in size, which I bought new earlier this year.
By default it had some kind of FAT partition starting at 16 MB.
Did I do something wrong? Should I run it differently?
You may or may not know, or care, but the "Linaro flash memory survey [1]" page at https://wiki.linaro.org/WorkingGroups/KernelArchived/Projects/FlashCardSurvey pointed to by this project's README no longer exists (shows a "This page does not exist [...]" page).
You may want (or not) to update it to wherever the page was moved to, or if it was simply deleted, replace it with the last non-broken page saved at the Web Archive: https://web.archive.org/web/20181027222214/https://wiki.linaro.org/WorkingGroups/KernelArchived/Projects/FlashCardSurvey
I'm looking to optimize my card for use with a chroot on android and have trouble interpreting the numbers as explained in the readme. There's a step up from 4k to 8k and then back down from 8k to 16k. And I guess the erase block size is 2M? The linux sysfs reports 4M. From the factory, the partition was aligned to 64k. I'm confused :/
$ sudo flashbench -a /dev/sdb --blocksize=1024 --count=10
align 68719476736 pre 363µs on 610µs post 286µs diff 286µs
align 34359738368 pre 375µs on 617µs post 335µs diff 262µs
align 17179869184 pre 365µs on 566µs post 355µs diff 206µs
align 8589934592 pre 297µs on 514µs post 289µs diff 222µs
align 4294967296 pre 299µs on 506µs post 288µs diff 213µs
align 2147483648 pre 302µs on 511µs post 289µs diff 215µs
align 1073741824 pre 290µs on 493µs post 280µs diff 208µs
align 536870912 pre 298µs on 515µs post 292µs diff 220µs
align 268435456 pre 299µs on 506µs post 292µs diff 210µs
align 134217728 pre 287µs on 486µs post 280µs diff 203µs
align 67108864 pre 294µs on 502µs post 290µs diff 210µs
align 33554432 pre 299µs on 510µs post 290µs diff 216µs
align 16777216 pre 290µs on 501µs post 284µs diff 214µs
align 8388608 pre 287µs on 504µs post 278µs diff 221µs
align 4194304 pre 299µs on 508µs post 286µs diff 216µs
align 2097152 pre 289µs on 494µs post 279µs diff 210µs
align 1048576 pre 286µs on 304µs post 286µs diff 18.2µs
align 524288 pre 280µs on 296µs post 278µs diff 17.3µs
align 262144 pre 286µs on 302µs post 285µs diff 16.2µs
align 131072 pre 286µs on 303µs post 287µs diff 16.7µs
align 65536 pre 290µs on 303µs post 290µs diff 12.9µs
align 32768 pre 293µs on 304µs post 292µs diff 11.7µs
align 16384 pre 294µs on 307µs post 294µs diff 13µs
align 8192 pre 292µs on 314µs post 299µs diff 18.5µs
align 4096 pre 292µs on 304µs post 289µs diff 13.6µs
align 2048 pre 291µs on 304µs post 291µs diff 12.7µs
The card is an adata ausdx256gui3v30sha2-ra1, the only card I could find (on the german market) that advertises both high endurance and class A2 for high IOPS. https://www.adata.com/upload/downloadfile/Datasheet-High%20Endurance%20microSD_20190625v2.pdf
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
Django
The Web framework for perfectionists with deadlines.
Laravel
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
Microsoft
Open source projects and samples from Microsoft.
Google
Google ❤️ Open Source for everyone.
Alibaba
Alibaba Open Source for everyone
D3
Data-Driven Documents codes.
Tencent
China tencent open source team.