From the KFD perspective, the series is
Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
David, I looked at the ROCr and Thunk changes as well, and they look
reasonable to me. Do you have any feedback on these patches from a ROCr
point of view? Is there a reasonable stress test that could be used
check that this handles the race conditions as expected and allows all
waiters to sleep?
Regards,
Felix
On 2023-06-09 16:43, James Zhu wrote:
Set waiter's activated flag true when event age unmatchs with last_event_age.
-v4: add event type check
-v5: improve on event age enable and activated flags
Signed-off-by: James Zhu <James.Zhu@xxxxxxx>
---
drivers/gpu/drm/amd/amdkfd/kfd_events.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.c b/drivers/gpu/drm/amd/amdkfd/kfd_events.c
index c7689181cc22..b2586a1dd35d 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_events.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.c
@@ -41,6 +41,7 @@ struct kfd_event_waiter {
wait_queue_entry_t wait;
struct kfd_event *event; /* Event to wait for */
bool activated; /* Becomes true when event is signaled */
+ bool event_age_enabled; /* set to true when last_event_age is non-zero */
};
/*
@@ -797,9 +798,9 @@ static struct kfd_event_waiter *alloc_event_waiters(uint32_t num_events)
static int init_event_waiter(struct kfd_process *p,
struct kfd_event_waiter *waiter,
- uint32_t event_id)
+ struct kfd_event_data *event_data)
{
- struct kfd_event *ev = lookup_event_by_id(p, event_id);
+ struct kfd_event *ev = lookup_event_by_id(p, event_data->event_id);
if (!ev)
return -EINVAL;
@@ -808,6 +809,15 @@ static int init_event_waiter(struct kfd_process *p,
waiter->event = ev;
waiter->activated = ev->signaled;
ev->signaled = ev->signaled && !ev->auto_reset;
+
+ /* last_event_age = 0 reserved for backward compatible */
+ if (waiter->event->type == KFD_EVENT_TYPE_SIGNAL &&
+ event_data->signal_event_data.last_event_age) {
+ waiter->event_age_enabled = true;
+ if (ev->event_age != event_data->signal_event_data.last_event_age)
+ waiter->activated = true;
+ }
+
if (!waiter->activated)
add_wait_queue(&ev->wq, &waiter->wait);
spin_unlock(&ev->lock);
@@ -948,8 +958,7 @@ int kfd_wait_on_events(struct kfd_process *p,
goto out_unlock;
}
- ret = init_event_waiter(p, &event_waiters[i],
- event_data.event_id);
+ ret = init_event_waiter(p, &event_waiters[i], &event_data);
if (ret)
goto out_unlock;
}
