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hv: sched: remove runqueue from current schedule logic

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Currently we are using a 1:1 mapping logic for pcpu:vcpu. So don't need
a runqueue for it. Removing it as preparation work to abstract scheduler
framework.

Tracked-On: #3813
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Shuo A Liu 2019-10-14 16:28:19 +08:00 committed by ACRN System Integration
parent 837e4d8788
commit de157ab96c
3 changed files with 16 additions and 26 deletions
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9
hypervisor/arch/x86/guest/vcpu.c
View File

@ -667,7 +667,7 @@ void pause_vcpu(struct acrn_vcpu *vcpu, enum vcpu_state new_state)
vcpu->state = new_state;
if (vcpu->running) {
remove_from_cpu_runqueue(&vcpu->thread_obj);
remove_thread_obj(&vcpu->thread_obj, vcpu->pcpu_id);
if (is_lapic_pt_enabled(vcpu)) {
make_reschedule_request(vcpu->pcpu_id, DEL_MODE_INIT);
@ -683,7 +683,7 @@ void pause_vcpu(struct acrn_vcpu *vcpu, enum vcpu_state new_state)
}
}
} else {
remove_from_cpu_runqueue(&vcpu->thread_obj);
remove_thread_obj(&vcpu->thread_obj, vcpu->pcpu_id);
release_schedule_lock(vcpu->pcpu_id);
}
}
@ -696,7 +696,7 @@ void resume_vcpu(struct acrn_vcpu *vcpu)
vcpu->state = vcpu->prev_state;
if (vcpu->state == VCPU_RUNNING) {
add_to_cpu_runqueue(&vcpu->thread_obj, vcpu->pcpu_id);
insert_thread_obj(&vcpu->thread_obj, vcpu->pcpu_id);
make_reschedule_request(vcpu->pcpu_id, DEL_MODE_IPI);
}
release_schedule_lock(vcpu->pcpu_id);
@ -733,7 +733,7 @@ void schedule_vcpu(struct acrn_vcpu *vcpu)
pr_dbg("vcpu%hu scheduled", vcpu->vcpu_id);
get_schedule_lock(vcpu->pcpu_id);
add_to_cpu_runqueue(&vcpu->thread_obj, vcpu->pcpu_id);
insert_thread_obj(&vcpu->thread_obj, vcpu->pcpu_id);
make_reschedule_request(vcpu->pcpu_id, DEL_MODE_IPI);
release_schedule_lock(vcpu->pcpu_id);
}
@ -747,7 +747,6 @@ int32_t prepare_vcpu(struct acrn_vm *vm, uint16_t pcpu_id)
ret = create_vcpu(pcpu_id, vm, &vcpu);
if (ret == 0) {
INIT_LIST_HEAD(&vcpu->thread_obj.run_list);
snprintf(thread_name, 16U, "vm%hu:vcpu%hu", vm->vm_id, vcpu->vcpu_id);
(void)strncpy_s(vcpu->thread_obj.name, 16U, thread_name, 16U);
vcpu->thread_obj.thread_entry = vcpu_thread;

25
hypervisor/common/schedule.c
View File

@ -23,7 +23,6 @@ void init_scheduler(void)
ctl = &per_cpu(sched_ctl, i);
spinlock_init(&ctl->scheduler_lock);
INIT_LIST_HEAD(&ctl->runqueue);
ctl->flags = 0UL;
ctl->curr_obj = NULL;
}
@ -41,31 +40,23 @@ void release_schedule_lock(uint16_t pcpu_id)
spinlock_release(&ctl->scheduler_lock);
}
void add_to_cpu_runqueue(struct thread_object *obj, uint16_t pcpu_id)
void insert_thread_obj(struct thread_object *obj, uint16_t pcpu_id)
{
struct sched_control *ctl = &per_cpu(sched_ctl, pcpu_id);
if (list_empty(&obj->run_list)) {
list_add_tail(&obj->run_list, &ctl->runqueue);
}
ctl->thread_obj = obj;
}
void remove_from_cpu_runqueue(struct thread_object *obj)
void remove_thread_obj(__unused struct thread_object *obj, uint16_t pcpu_id)
{
list_del_init(&obj->run_list);
struct sched_control *ctl = &per_cpu(sched_ctl, pcpu_id);
ctl->thread_obj = NULL;
}
static struct thread_object *get_next_sched_obj(struct sched_control *ctl)
static struct thread_object *get_next_sched_obj(const struct sched_control *ctl)
{
struct thread_object *obj = NULL;
if (!list_empty(&ctl->runqueue)) {
obj = get_first_item(&ctl->runqueue, struct thread_object, run_list);
} else {
obj = &get_cpu_var(idle);
}
return obj;
return ctl->thread_obj == NULL ? &get_cpu_var(idle) : ctl->thread_obj;
}
/**

8
hypervisor/include/common/schedule.h
View File

@ -18,7 +18,6 @@ typedef void (*thread_entry_t)(struct thread_object *obj);
typedef void (*switch_t)(struct thread_object *obj);
struct thread_object {
char name[16];
struct list_head run_list;
uint64_t host_sp;
thread_entry_t thread_entry;
switch_t switch_out;
@ -26,10 +25,11 @@ struct thread_object {
};
struct sched_control {
struct list_head runqueue;
uint64_t flags;
struct thread_object *curr_obj;
spinlock_t scheduler_lock; /* to protect sched_control and thread_object */
struct thread_object *thread_obj;
};
void init_scheduler(void);
@ -37,8 +37,8 @@ void switch_to_idle(thread_entry_t idle_thread);
void get_schedule_lock(uint16_t pcpu_id);
void release_schedule_lock(uint16_t pcpu_id);
void add_to_cpu_runqueue(struct thread_object *obj, uint16_t pcpu_id);
void remove_from_cpu_runqueue(struct thread_object *obj);
void insert_thread_obj(struct thread_object *obj, uint16_t pcpu_id);
void remove_thread_obj(struct thread_object *obj, uint16_t pcpu_id);
void make_reschedule_request(uint16_t pcpu_id, uint16_t delmode);
bool need_reschedule(uint16_t pcpu_id);