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kernel: make order_key field in thread conditional

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The 'order_key' field in the thread structure '_thread_base' is only
required when CONFIG_SCHED_SCALABLE and/or CONFIG_WAITQ_SCALABLE are
enabled (neither of which is a default setting). Making the existence
of this field conditional slightly reduces the size of the k_thread
structure when neither of those Kconfig options are selected.

Signed-off-by: Peter Mitsis <peter.mitsis@intel.com>
This commit is contained in:
Peter Mitsis 2025-03-05 11:37:44 -08:00 • committed by Benjamin Cabé
commit ec4df64dc7
3 changed files with 11 additions and 3 deletions
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2
include/zephyr/kernel/thread.h
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@ -105,7 +105,9 @@ struct _thread_base {
int prio_deadline;
#endif /* CONFIG_SCHED_DEADLINE */
#if defined(CONFIG_SCHED_SCALABLE) || defined(CONFIG_WAITQ_SCALABLE)
uint32_t order_key;
#endif
#ifdef CONFIG_SMP
/* True for the per-CPU idle threads */

6
kernel/CMakeLists.txt
View file

@ -80,10 +80,14 @@ list(APPEND kernel_files
system_work_q.c
work.c
condvar.c
priority_queues.c
thread.c
sched.c
)
if (CONFIG_SCHED_SCALABLE OR CONFIG_WAITQ_SCALABLE)
list(APPEND kernel_files priority_queues.c)
endif()
# FIXME: Once the prior pipe implementation is removed, this should be included in the above list
if(NOT CONFIG_PIPES)
list(APPEND kernel_files pipe.c)

6
kernel/include/priority_q.h
View file

@ -10,8 +10,6 @@
#include <zephyr/sys/math_extras.h>
#include <zephyr/sys/dlist.h>
bool z_priq_rb_lessthan(struct rbnode *a, struct rbnode *b);
/* Dumb Scheduling */
#if defined(CONFIG_SCHED_DUMB)
#define _priq_run_init z_priq_dumb_init
@ -185,8 +183,11 @@ static ALWAYS_INLINE struct k_thread *z_priq_dumb_mask_best(sys_dlist_t *pq)
}
#endif /* CONFIG_SCHED_CPU_MASK */
#if defined(CONFIG_SCHED_SCALABLE) || defined(CONFIG_WAITQ_SCALABLE)
static ALWAYS_INLINE void z_priq_rb_init(struct _priq_rb *pq)
{
bool z_priq_rb_lessthan(struct rbnode *a, struct rbnode *b);
*pq = (struct _priq_rb) {
.tree = {
.lessthan_fn = z_priq_rb_lessthan,
@ -244,6 +245,7 @@ static ALWAYS_INLINE struct k_thread *z_priq_rb_best(struct _priq_rb *pq)
}
return thread;
}
#endif
struct prio_info {
uint8_t offset_prio;