Per-CPU scheduling context. More...

#include <sched.h>

Data Fields
sched_queues_t	queues [2]
	Array storing both queues.

sched_queues_t *	active
	Pointer to the currently active queue.

sched_queues_t *	expired
	Pointer to the currently expired queue.

thread_t *	runThread
	The currently running thread.

thread_t *	idleThread
	The thread that runs when the owner CPU is idling.

lock_t	lock
	The lock that protects this context, except the `zombieThreads` list.

cpu_t *	owner
	The cpu that owns this scheduling context.

Detailed Description

Per-CPU scheduling context.

The sched_cpu_ctx_t structure holds the scheduling context for a each CPU.

Definition at line 94 of file sched.h.

Field Documentation

◆ active

sched_queues_t* sched_cpu_ctx_t::active

Pointer to the currently active queue.

Definition at line 106 of file sched.h.

Referenced by sched_cpu_ctx_init(), sched_get_load(), sched_invoke(), sched_load_balance(), sched_push(), and sched_push_new_thread().

◆ expired

sched_queues_t* sched_cpu_ctx_t::expired

Pointer to the currently expired queue.

Definition at line 110 of file sched.h.

Referenced by sched_cpu_ctx_init(), sched_get_load(), sched_invoke(), and sched_load_balance().

◆ idleThread

thread_t* sched_cpu_ctx_t::idleThread

The thread that runs when the owner CPU is idling.

This thread never changes after boot, so no need for a lock.

Definition at line 125 of file sched.h.

Referenced by panic(), sched_cpu_ctx_init(), sched_done_with_boot_thread(), sched_get_load(), sched_invoke(), sched_is_idle(), and sched_should_notify().

◆ lock

lock_t sched_cpu_ctx_t::lock

The lock that protects this context, except the zombieThreads list.

Definition at line 129 of file sched.h.

Referenced by sched_cpu_ctx_init(), sched_get_load(), sched_invoke(), sched_is_idle(), sched_load_balance(), sched_push(), and sched_push_new_thread().

◆ owner

cpu_t* sched_cpu_ctx_t::owner

The cpu that owns this scheduling context.

Definition at line 130 of file sched.h.

Referenced by sched_cpu_ctx_init().

◆ queues

sched_queues_t sched_cpu_ctx_t::queues[2]

Array storing both queues.

Should never be accessed always use the pointer active and expired as those always point to these queues.

Definition at line 102 of file sched.h.

Referenced by sched_cpu_ctx_init().

◆ runThread

thread_t* sched_cpu_ctx_t::runThread

The currently running thread.

Accessing the run thread can be a bit weird; if the run thread is accessed by the currently running thread, then there is no need for a lock as it will always see the same value, itself. However, if it is accessed from another CPU, then the lock is needed.

Definition at line 119 of file sched.h.

Referenced by init_early(), panic(), sched_cpu_ctx_init(), sched_done_with_boot_thread(), sched_get_load(), sched_invoke(), sched_is_idle(), sched_should_notify(), sched_thread(), sched_thread_unsafe(), sched_yield(), wait_block_cancel(), wait_block_commit(), and wait_block_setup().

The documentation for this struct was generated from the following file:

include/kernel/sched/sched.h

Data Fields