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hv: sched_bvt: add wakeup and sleep handler 

In the wakeup handler, the vcpu_thread object will be inserted into the
runqueue, and in the sleep handler, it will be removed from the queue.
vcpu_thread object is ordered by EVT (effective virtual time).

Tracked-On: #4410

Signed-off-by: Conghui Chen <conghui.chen@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:
Conghui Chen 2020-02-10 13:55:35 +00:00 committed by wenlingz
parent e05eb42c1e
commit a38f2cc918
1 changed files with 98 additions and 2 deletions
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100
hypervisor/common/sched_bvt.c
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@ -30,6 +30,88 @@ struct sched_bvt_data {
uint64_t start_tsc;
};
/*
* @pre obj != NULL
* @pre obj->data != NULL
*/
static bool is_inqueue(struct thread_object *obj)
{
struct sched_bvt_data *data = (struct sched_bvt_data *)obj->data;
return !list_empty(&data->list);
}
/*
* @pre obj != NULL
* @pre obj->data != NULL
* @pre obj->sched_ctl != NULL
* @pre obj->sched_ctl->priv != NULL
*/
static void runqueue_add(struct thread_object *obj)
{
struct sched_bvt_control *bvt_ctl =
(struct sched_bvt_control *)obj->sched_ctl->priv;
struct sched_bvt_data *data = (struct sched_bvt_data *)obj->data;
struct list_head *pos;
struct thread_object *iter_obj;
struct sched_bvt_data *iter_data;
/*
* the earliest evt has highest priority,
* the runqueue is ordered by priority.
*/
if (list_empty(&bvt_ctl->runqueue)) {
list_add(&data->list, &bvt_ctl->runqueue);
} else {
list_for_each(pos, &bvt_ctl->runqueue) {
iter_obj = list_entry(pos, struct thread_object, data);
iter_data = (struct sched_bvt_data *)iter_obj->data;
if (iter_data->evt > data->evt) {
list_add_node(&data->list, pos->prev, pos);
break;
}
}
if (!is_inqueue(obj)) {
list_add_tail(&data->list, &bvt_ctl->runqueue);
}
}
}
/*
* @pre obj != NULL
* @pre obj->data != NULL
*/
static void runqueue_remove(struct thread_object *obj)
{
struct sched_bvt_data *data = (struct sched_bvt_data *)obj->data;
list_del_init(&data->list);
}
/*
* @brief Get the SVT (scheduler virtual time) which indicates the
* minimum AVT of any runnable threads.
* @pre obj != NULL
* @pre obj->data != NULL
* @pre obj->sched_ctl != NULL
* @pre obj->sched_ctl->priv != NULL
*/
static int64_t get_svt(struct thread_object *obj)
{
struct sched_bvt_control *bvt_ctl = (struct sched_bvt_control *)obj->sched_ctl->priv;
struct sched_bvt_data *obj_data;
struct thread_object *tmp_obj;
int64_t svt = 0;
if (!list_empty(&bvt_ctl->runqueue)) {
tmp_obj = get_first_item(&bvt_ctl->runqueue, struct thread_object, data);
obj_data = (struct sched_bvt_data *)tmp_obj->data;
svt = obj_data->avt;
}
return svt;
}
static void sched_tick_handler(__unused void *param)
{
}
@ -83,12 +165,26 @@ static struct thread_object *sched_bvt_pick_next(__unused struct sched_control *
return NULL;
}
static void sched_bvt_sleep(__unused struct thread_object *obj)
static void sched_bvt_sleep(struct thread_object *obj)
{
runqueue_remove(obj);
}
static void sched_bvt_wake(__unused struct thread_object *obj)
static void sched_bvt_wake(struct thread_object *obj)
{
struct sched_bvt_data *data;
int64_t svt, threshold;
data = (struct sched_bvt_data *)obj->data;
svt = get_svt(obj);
threshold = svt - BVT_CSA_MCU;
/* adjusting AVT for a thread after a long sleep */
data->avt = (data->avt > threshold) ? data->avt : svt;
/* TODO: evt = avt - (warp ? warpback : 0U) */
data->evt = data->avt;
/* add to runqueue in order */
runqueue_add(obj);
}
struct acrn_scheduler sched_bvt = {