What process scheduler does Linux use?

What process scheduler does Linux use?

Completely Fair Scheduling
Linux uses a Completely Fair Scheduling (CFS) algorithm, which is an implementation of weighted fair queueing (WFQ). Imagine a single CPU system to start with: CFS time-slices the CPU among running threads. There is a fixed time interval during which each thread in the system must run at least once.

What is the default scheduler in Linux?

Completely Fair Scheduler
Since Linux 2.6. 23, the default scheduler is CFS, the “Completely Fair Scheduler”. The CFS scheduler replaced the earlier “O(1)” scheduler. API summary Linux provides the following system calls for controlling the CPU scheduling behavior, policy, and priority of processes (or, more precisely, threads).

What type of scheduler is used in Linux?

The Completely Fair Scheduler ( CFS) is a process scheduler which was merged into the 2.6.23 (October 2007) release of the Linux kernel and is the default scheduler. It handles CPU resource allocation for executing processes, and aims to maximize overall CPU utilization while also maximizing interactive performance.

Does Linux schedule a process or a thread?

This allows implementing of group scheduling, where CPU time is first divided between process groups and then distributed within those groups to single threads. Linux threads does not directly operate on processes or threads, but works with schedulable entities.

What is process scheduling in Linux?

The scheduler (or process scheduler, as it is sometimes called) can be viewed as the code that divides the finite resource of processor time between the runnable processes on a system. The scheduler is the basis of a multitasking operating system such as Linux.

How to use cron in Linux?

such as regular backups that occur daily at 2 a.m.