scheduling.md

Scheduling

General

schedule() runs on all cores in an infinite loop after the boot code (see life_cycle_cpu). When they find a run-able process, the switch to it (context_switch()). All processes have a kernel context which was active when they called yield() (e.g. from a timer interrupts) or from when they were created.

From the processes perspective: life_cycle_user_application.

Note:

• Tasks can switch CPUs.
• Tasks can switch CPUs while in Supervisor Mode

Scheduling Algorithm

• A primitive round-robin scheduler without any priorities.
• All CPUs go over the same global process list, CPUs can be switched at random.

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Overview: kernel

Boot: boot_process | init_overview

Subsystems: interrupts | devices | file_system | memory_management processes | scheduling | syscalls