PREEMPT_RT Archives

News

14/10/26

What Is a Real-Time Embedded System? Hard, Firm and Soft Deadlines Explained

A clear introduction to real-time embedded systems: what makes timing part of correctness, how hard, firm and soft…

05/10/26

Contract-Based Scheduling Explained: Making Embedded Software Composable

How scheduling contracts work: minimum budgets and periods, online negotiation and admission control, spare-capacity distribution and server-based enforcement,…

26/09/26

Rate Monotonic vs Earliest Deadline First: A Practical Comparison

A practical comparison of Rate Monotonic and EDF scheduling covering the Liu and Layland bound, EDF optimality, exact…

PREEMPT_RT

RTOS & Platforms 12 min read

SCHED_DEADLINE and the Constant Bandwidth Server: Resource Reservations in Linux

A practical guide to Linux SCHED_DEADLINE: how EDF and the Constant Bandwidth Server provide CPU reservations, how to set runtime, deadline and period, what…

RTOS & Platforms 11 min read

Choosing an RTOS in 2026: Zephyr, FreeRTOS, NuttX, RTEMS and PREEMPT_RT Linux Compared

A timing-first comparison of Zephyr, FreeRTOS, Apache NuttX, RTEMS and mainline PREEMPT_RT Linux: scheduling models, configuration, licensing, multicore support, certification paths and how to…