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In 2023, Peter Zijlstra proposed replacing the Completely Fair Scheduler (CFS) in the Linux kernel with an EEVDF process scheduler. [4] [5] The aim was to remove the need for CFS "latency nice" patches. [6] The EEVDF scheduler replaced CFS in version 6.6 of the Linux kernel. [7]
The Completely Fair Scheduler (CFS) was a process scheduler that was merged into the 2.6.23 (October 2007) release of the Linux kernel. It was the default scheduler of the tasks of the SCHED_NORMAL class (i.e., tasks that have no real-time execution constraints) and handled CPU resource allocation for executing processes , aiming to maximize ...
The real-time scheduler developed in the context of the IRMOS Archived 2018-10-10 at the Wayback Machine European Project is a multi-processor real-time scheduler for the Linux kernel, particularly suitable for temporal isolation and provisioning of QoS guarantees to complex multi-threaded software components and also entire virtual machines.
The location of process schedulers in a simplified structure of the Linux kernel. The Brain Fuck Scheduler (BFS) is a process scheduler designed for the Linux kernel in August 2009 based on earliest eligible virtual deadline first scheduling (EEVDF), [2] as an alternative to the Completely Fair Scheduler (CFS) and the O(1) scheduler. [3]
The O(n) scheduler [1] is the scheduler used in the Linux kernel between versions 2.4 and 2.6. Since version 2.6.0, it has been replaced by the O(1) scheduler and in 2.6.23 by the Completely Fair Scheduler (CFS), which itself was replaced by the current Earliest eligible virtual deadline first (EEVDF) in 6.6.
The new EEVDF process scheduler was merged. It aims to replace the CFS scheduler. Intel Shadow Stack was finally merged; Exploiting ROPs is now harder; Support for Partial SMT; Performance Improvement for CPUs with a lot of cores and shared Last Level Caches; Continued Intel Meteor Lake graphics and sound enablement/improvements.
Location of the process scheduler in a simplified structure of the Linux kernel. SCHED_DEADLINE is a CPU scheduler available in the Linux kernel since version 3.14, [1] [2] based on the earliest deadline first (EDF) and constant bandwidth server (CBS) [3] algorithms, supporting resource reservations: each task scheduled under such policy is associated with a budget Q (aka runtime), and a ...
PREEMPT_RT was a set of patches for the Linux kernel which implement both hard and soft real-time computing capabilities. [1] On September 20, 2024, PREEMPT_RT was fully merged and enabled in mainline Linux on the supported architectures x86, x86_64, RISC-V and ARM64. [2]