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2016-05-25flashbench: add Android makefileHEADmastermainRom Lemarchand
Bug: 28866589 Change-Id: Ie55f992cfe782027f3f5e505284b35d9b728c239
2016-05-25flashbench: add README.version fileRom Lemarchand
Bug: 28866589 Change-Id: I4f60413e25407a57b8672a72fce8316139012149
2012-06-06flashbench: use only one out of 12 erase blocksArnd Bergmann
This helps with TLC memory when while guessing the erase block size, so that the guessed erase block start is at the start of the actual erase block. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2012-06-06flashbench: fix MakefileArnd Bergmann
This avoids link errors that people have reported Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2012-02-22Add a license file with GPLv2Arnd Bergmann
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-03-29flashbench: start at multiple of erasesize for --open-auArnd Bergmann
Apparently, 1.5 MB erase blocks or multiples of that are more common than I first thought, so automatically try to handle these by starting at a multiple of the erase blcok. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-03-27flashbench: add --offset command line argumentArnd Bergmann
This makes it easier to do the --open-au test case on drives whose erase block is not a power of two. Note that for those, you have to pass a blocksize that is also not a power of two, but a fraction of the erase size, e.g. flashbench --open-au --random --open-au-nr=6 \ --erasesize=$[3 * 1024 * 1024] \ --blocksize=$[24 * 1024] \ --offset=$[24 * 1024 * 1024] \ /dev/sde Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-03-27flashbench: add try_open_au_oobArnd Bergmann
This function is needed for certain USB sticks that use an odd erase block size (4128 KiB in one case). We will probably need this later, commit it as unused for now. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-03-24flashbench: spread out --open-au test some moreArnd Bergmann
Using every other erase block is bad when you have guessed the erase block size incorrectly. Better skip three for each one we test, to have a better chance of actually hitting separate erase blocks. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-03-24flashbench: compute proper averageArnd Bergmann
We want to compute the bytes per second from the average of the times it takes to read many sectors, not compute the average of the throughput, which is somewhat different and less interesting. Also, use only one try for the --open-au test, instead of the maximum of three. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-03-24flashbench: use lower number of samples in -a testArnd Bergmann
Turns out a bit too much, and might hide some effects. Also, using something just below a power of two works better, so use 7 now. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-03-09flashbench: fix time_to_ns for 32 bit systemsArnd Bergmann
Incorrect type conversion results in potentially negative time values. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-19flashbench: fix FAT benchmarkArnd Bergmann
Random needs to be applied to blocks in the segment, not the order of blocks. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-17flashbench: extend READMEArnd Bergmann
This adds an explanation about how to find the number of open segments/eraseblocks. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-17flashbench: add README fileArnd Bergmann
This adds a little introductory file describing how to use flashbench. Needs more text still. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-17Revert "flashbench: remove alignment tests"Arnd Bergmann
This reverts commit eefa89baa9800a3904d4ada44a61132f299a6633. Actually, I still want this back. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-16flashbench: move nr-of-aus-detection into its own functionArnd Bergmann
With this change, the program basically gets usable from the command line. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-16flashbench: allow finding the FAT using CLIArnd Bergmann
Recompiling flashbench every time to run it with different arguments sucks, so allow the find-fat test to be run from the command line, with all necessary args for tuning. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-16flashbench: remove alignment testsArnd Bergmann
These turned out to be pretty useless, so I'll just remove them. If someone wants them back, they are still in the git history and we can write them in using our program language. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-16flashbench: allow passing an erase block sizeArnd Bergmann
This is currently unused, but will be used to simplify running the programmed tests. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-16flashbench: make -verbose switch work with vm.cArnd Bergmann
This has been annoying me for far too long, time to fix it. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-16flashbench: fix erase usage printfArnd Bergmann
obvious typo fix Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-16flashbench: print scatter test results in ms & MBArnd Bergmann
Bytes and nanoseconds are relatively impractical, so print them in units that are easier to process with gnuplot. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-16flashbench: fix random generator to also include 0Arnd Bergmann
The linear feedback shift register used to create pseudorandom numbers cycles through all possible values, but not zero. Add a special case for this. The result is that zero is always the last number. This guarantees that any sequence can not be sorted, even for very small sets. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-02-16flashbench: add an erase toolArnd Bergmann
This trivial tool can be used to erase block devices using the BLKDISCARD ioctl. The tool does nothing but calling that ioctl with the command line arguments. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-12flashbench: fix building on 32 bitsArnd Bergmann
This fixes all warnings and one confusion of off_t and size_t Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-12flashbench: change some parameters for current testArnd Bergmann
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-09flashbench: implement erase operation using BLKDISCARDArnd Bergmann
Erasing blocks has a huge impact on timing, we need to test this. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-05flashbench: print MB/s in 1000 not 1024 unitsArnd Bergmann
This fixes inconsistencies in the output. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-05flashbench: add test for number of open AUsArnd Bergmann
The new test case writes data to random positions in a varying number of AUs, using varying block sizes. Example output: 1 AU 2 AU 3 AU 4 AU 5 AU 8 AU 4MiB 8.98M/s 8.99M/s 9.01M/s 9M/s 8.99M/s 9M/s 2MiB 9.09M/s 6.88M/s 7.55M/s 6.85M/s 4.84M/s 4.84M/s 1MiB 7.59M/s 7.47M/s 3.81M/s 2.59M/s 2.55M/s 2.55M/s 512KiB 8.42M/s 7.54M/s 1.82M/s 1.69M/s 1.35M/s 1.31M/s 256KiB 9.01M/s 8.18M/s 1.22M/s 778K/s 681K/s 681K/s 128KiB 7.79M/s 7.27M/s 1.02e+0 816K/s 358K/s 340K/s 64KiB 12.1M/s 11.2M/s 4.7M/s 4.19M/s 336K/s 173K/s Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-04flashbench: improve pretty-printing and indentationArnd Bergmann
All pretty-printed output is now 8 characters wide. Indent the program by four spaces, not tabs, so it fits better here. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-04flashbench: allow output in bytes per secondArnd Bergmann
A new O_BPS code is used to convert from length and ns to bytes per second, and the O_FORMAT operation can pretty-print this. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-04flashbench: add test for random writes etc.Arnd Bergmann
This adds the same lfsr function to the vm that was already in the base flashbench, for doing random read/write offset tests. Something was wrong in the buffer logic, rewrote it to make sure we have the right data in zero/ones/rand write buffers. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-04flashbench: make use of max argumentArnd Bergmann
In a O_OFF_LIN or O_OFF_RAND series, autofill until max using the current length. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-04flashbench: implement write opcodes in vmArnd Bergmann
This makes it possible to use three kinds of write operations, writing zero-, one- or somwhat random contents. Many media have different characteristics depending on the kind of content. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-04flashbench: enable printing bytes in vmArnd Bergmann
This lets us print more meaningful output. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-04flashbench: interface main program with vmArnd Bergmann
Finally, we can actually read from the device to do measurements with the vm. Start with a simple test case using the '-p' option in the main flashbench. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-04flashbench: make code more modularArnd Bergmann
This makes it possible to call programs from outside of vm.c, and moves all device access to dev.c, as a step towards integrating the flashbench front-end with the vm. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-04flashbench: vm stylistic cleanupArnd Bergmann
- add newline command shortcut - change indentation of pseudo programs Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-04flashbench: implement drop operationArnd Bergmann
Need a way to ignore results. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-04flashbench: fix vm bugsArnd Bergmann
Lots of small changes. Sequence now folds the result if there is only one. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-03flashbench: add formatted outputArnd Bergmann
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-03flashbench: fix some minor bugsArnd Bergmann
It's now possible to run the first bogus test without crashing. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-03flashbench: add vm dummy main and error reportingArnd Bergmann
Instead of just returning NULL, this now prints an error message and back trace. The main function can test the interpreter. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-03flashbench: pass down results correctlyArnd Bergmann
This also passes down types and array sizes. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-03flashbench: pass back results to parent nodeArnd Bergmann
Rudimentary for now, just collect data, not sizes and type. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-03flashbench: new basic data typeArnd Bergmann
This changes the code to use a union of integer, string and pointer as the result type, so we can have nesting arrays. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-02flashbench: add REPEAT and REDUCE operationsArnd Bergmann
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-02flashbench: add initial runtime unitArnd Bergmann
This is the start of a rewrite of the entire program, based on the idea of defining test cases dynamically in pseudo-code. A test case is written as a C data structure containing basic operations (read, write, erase, ...), output (text, times, ...) and loops to repeat operations with different positions and sizes. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-01-02flashbench: ignore some gcc warningsArnd Bergmann
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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