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hv: make thread status more accurate 

1. Update thread status after switch_in/switch_out.
2. Add 'be_blocking' to represent the intermediate state during
sleep_thread and switch_out. After switch_out, the thread status
update to THREAD_STS_BLOCKED.

Tracked-On: #5057
Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Reviewed-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Conghui Chen 2020-07-17 23:21:17 +08:00 committed by wenlingz
parent 312ea0b374
commit 2abbb99f6a
2 changed files with 14 additions and 12 deletions
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25
hypervisor/common/schedule.c
View File

@ -169,25 +169,26 @@ void schedule(void)
}
bitmap_clear_lock(NEED_RESCHEDULE, &ctl->flags);
/* Don't change prev object's status if it's not running */
if (is_running(prev)) {
set_thread_status(prev, THREAD_STS_RUNNABLE);
}
set_thread_status(next, THREAD_STS_RUNNING);
ctl->curr_obj = next;
release_schedule_lock(pcpu_id, rflag);
/* If we picked different sched object, switch context */
if (prev != next) {
if ((prev != NULL) && (prev->switch_out != NULL)) {
prev->switch_out(prev);
if (prev != NULL) {
if (prev->switch_out != NULL) {
prev->switch_out(prev);
}
set_thread_status(prev, prev->be_blocking ? THREAD_STS_BLOCKED : THREAD_STS_RUNNABLE);
prev->be_blocking = false;
}
if ((next != NULL) && (next->switch_in != NULL)) {
if (next->switch_in != NULL) {
next->switch_in(next);
}
set_thread_status(next, THREAD_STS_RUNNING);
ctl->curr_obj = next;
release_schedule_lock(pcpu_id, rflag);
arch_switch_to(&prev->host_sp, &next->host_sp);
} else {
release_schedule_lock(pcpu_id, rflag);
}
}
@ -208,7 +209,7 @@ void sleep_thread(struct thread_object *obj)
make_reschedule_request(pcpu_id, DEL_MODE_IPI);
}
}
set_thread_status(obj, THREAD_STS_BLOCKED);
obj->be_blocking = true;
release_schedule_lock(pcpu_id, rflag);
}

1
hypervisor/include/common/schedule.h
View File

@ -37,6 +37,7 @@ struct thread_object {
struct sched_control *sched_ctl;
thread_entry_t thread_entry;
volatile enum thread_object_state status;
bool be_blocking;
enum sched_notify_mode notify_mode;
uint64_t host_sp;