fio is a command line tool for I/O benchmarking offering many advanced features for simulating different types of workloads. It can read and write test data sequentially or in random fashion. In the latter case, the program adds a header which helps to verify the integrity of each written data block.

Recently, I participated in the development of an embedded system as a software developer and my role was to develop or modify Linux device drivers to bring the system up. Network part of the system was based on Realtek’s RTL8211DN Ethernet tranceiver. I encountered several problems working with the driver for this chip which I want to share here.

jpeginfo is a utility for checking JPEG files for errors, calculating their MD5 sums and generating other information. Original version of the program can be found here: https://github.com/tjko/jpeginfo