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2022-11-18mtd-utils: flash_speed: Measure read while write latencyMiquel Raynal
The Read While Write (RWW) feature allows to perform reads from the flash array into cache while a program (from cache) or an erase operation happens, provided that the two areas are located on different banks. The main benefit is the possible reduced latency when requesting to read a page while a much longer operation is ongoing, like a write or an erase. We can try to compare the positive impact of such a feature by enhancing the flash_speed test tool with the following test: - Measure the time taken by an eraseblock write in parallel with an eraseblock read. - Measure when the read operation ends. - Compare the two to get the latency saved with the RWW feature. To be sure the mtd_write actually starts (and acquires the necessary locks) before the mtd_read does, we use SCHED_FIFO at rather high (arbitrary) priorities, respectively 42 and 41. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2021-01-20Fix test binary installationDavid Oberhollenzer
- Remove "install tests" configure option, we already have an option whether to build tests or not. Don't try to work around autotools semantics that people building the package expect. - Fix the installation path by propperly defining it and using the correct name for the libexec path. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2016-11-17mtd-utils: Add nand sub-page test utilityDavid Oberhollenzer
Basically a user space port of the mtd sub page test kernel module. In addition to the module parameters, the utility supports using only a sub-range of the flash erase blocks with a configurable stride and can restore the block contents after the test. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-11-17mtd-utils: Add nand page test utilityDavid Oberhollenzer
Basically a user space port of the mtd page test kernel module. In addition to the module parameters, the utility supports using only a sub-range of the flash erase blocks with a configurable stride. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-11-17mtd-utils: Add flash read test utilityDavid Oberhollenzer
Basically a user space port of the mtd read test kernel module. In addition to the module parameters, the utility can scan only a sub-range of the flash erase block with a configurable stride. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-11-17mtd-utils: Add nand flash bit errors testDavid Oberhollenzer
Basically a user space port of the mtd speed test kernel module. In addition to the module parameters, the utility can resture the block contents after test and allows setting the maxium writes for the test. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-11-17mtd-utils: Add flash speed test utilityDavid Oberhollenzer
Basically a user space port of the mtd speed test kernel module. In addition to the block offset and count module parameters, the utility supports a block stride and can restore the block contents after test. Furthermore, a flag can be used to disable destructive tests (i.e. only perform read speed tests). Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-11-17mtd-utils: Add flash stress test utilityDavid Oberhollenzer
Basically a user space port of the mtd stress test kernel module. In addition to the block offset and count module parameters, the utility supports a block stride and can restore the block contents after test. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-11-17mtd-utils: Add flash torture test utilityDavid Oberhollenzer
Basically a user space port of the mtd torture test kernel module. In addition to the block offset and count module parameters, the utility supports a block stride and can restore the block contents after test. In contrast to the kernel module, the torture test is implemented by the libmtd mtd_toruture function and thus doesn't allow for similarly fine grained options on diagnostics. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>