Posted 3rd August 2020
If debugging a Linux driver is bugging you, this 'how to' guide explains how to approach this using the function tracer within ftrace to find out what’s going on inside the kernel...
Posted 11th January 2019
Making a Stratum 1 Linux Time Server: Part 3 We have found out in the previous two parts of this series why distributed devices might need a method to synchronise their time to a reference. One ...more
Posted 14th December 2018
In the previous article we saw that getting distributed devices to agree on the current time is hard. This article, the second in a series of three, will introduce the concept of a time server – a ...more
Posted 4th December 2018
In general, distributed devices need to agree on time in order to effectively coordinate tasks, but getting every one to tell the same time is challenging! This article, the first in a series of ...more
Posted 3rd November 2017
Previous articles have explained one traditional aspect of an RTOS, responsive scheduling. This article details other factors to consider when choosing to use an RTOS.
Posted 26th October 2017
All real-time operating systems have “gotchas”, even those targeted at critical applications. The most infamous is “priority inversion”. This article outlines what this is and explains how it can ...more
Posted 19th October 2017
Disabling interrupts can cripple system responsiveness. This article discusses how RTOSes minimise interrupt disabling to give the best possible response time to critical events.
Posted 12th October 2017
In the embedded world, the use of a real-time operating system (RTOS) is commonplace, and with the advent of the Internet of Things (IoT) they are becoming more so. You may be deciding to use an RTOS ...more