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drm/amdkfd: Asynchronously free events

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The synchronize_rcu call in destroy_events can take several ms, which
noticeably slows down applications destroying many events. Use kfree_rcu
to free the event structure asynchronously and eliminate the
synchronize_rcu call in the user thread.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Philip Yang <Philip.Yang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Felix Kuehling 2022-04-07 22:08:03 -04:00 committed by Alex Deucher
parent 634c67ee33
commit 34d292d579
2 changed files with 3 additions and 2 deletions
drivers/gpu/drm/amd/amdkfd
kfd_events.ckfd_events.h

3
drivers/gpu/drm/amd/amdkfd/kfd_events.c
View File

@ -262,8 +262,7 @@ static void destroy_event(struct kfd_process *p, struct kfd_event *ev)
p->signal_event_count--;
idr_remove(&p->event_idr, ev->event_id);
synchronize_rcu();
kfree(ev);
kfree_rcu(ev, rcu);
}
static void destroy_events(struct kfd_process *p)

2
drivers/gpu/drm/amd/amdkfd/kfd_events.h
View File

@ -70,6 +70,8 @@ struct kfd_event {
struct kfd_hsa_memory_exception_data memory_exception_data;
struct kfd_hsa_hw_exception_data hw_exception_data;
};
struct rcu_head rcu; /* for asynchronous kfree_rcu */
};
#define KFD_EVENT_TIMEOUT_IMMEDIATE 0