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sched: Early exit when scheduling same thread after sleep

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This commit is contained in:
Koen Zandberg 2020-07-27 16:31:27 +02:00
parent 8b00d14014
commit 764b3102e4
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GPG Key ID: 0895A893E6D2985B
1 changed files with 10 additions and 2 deletions
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12
core/sched.c
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@ -106,7 +106,9 @@ static void _unschedule(thread_t *active_thread)
int __attribute__((used)) sched_run(void)
{
sched_context_switch_request = 0;
thread_t *active_thread = thread_get_active();
thread_t *previous_thread = active_thread;
if (!IS_USED(MODULE_CORE_IDLE_THREAD)) {
if (!runqueue_bitcache) {
@ -114,6 +116,7 @@ int __attribute__((used)) sched_run(void)
_unschedule(active_thread);
active_thread = NULL;
}
active_thread = NULL;
do {
sched_arch_idle();
@ -134,8 +137,13 @@ int __attribute__((used)) sched_run(void)
: active_thread->pid),
next_thread->pid);
if (active_thread == next_thread) {
if (previous_thread == next_thread) {
DEBUG("sched_run: done, sched_active_thread was not changed.\n");
#ifdef MODULE_SCHED_CB
if (sched_cb && !active_thread) {
sched_cb(KERNEL_PID_UNDEF, next_thread->pid);
}
#endif
return 0;
}
@ -159,7 +167,7 @@ int __attribute__((used)) sched_run(void)
#ifdef MODULE_MPU_STACK_GUARD
mpu_configure(
2, /* MPU region 2 */
(uintptr_t)sched_active_thread->stack_start + 31, /* Base Address (rounded up) */
(uintptr_t)next_thread->stack_start + 31, /* Base Address (rounded up) */
MPU_ATTR(1, AP_RO_RO, 0, 1, 0, 1, MPU_SIZE_32B) /* Attributes and Size */
);
#endif