Function: event_elapsed_time

Product	Supported (√/x)
Atlas A3 training products/Atlas A3 inference products	√
Atlas A2 training products/Atlas A2 inference products	√
Atlas training products	√
Atlas inference products	√
Atlas 200I/500 A2 inference products	√

Computes the elapsed time between two events.

C Prototype

aclError aclrtEventElapsedTime(float *ms, aclrtEvent startEvent, aclrtEvent endEvent)

Python Function

ms, ret = acl.rt.event_elapsed_time(start, end)

Parameter	Description
start	Int, pointer address of the start event object.
end	Int, pointer address of the end event object.

Return Value	Description
ms	Float, elapsed time between two events, in milliseconds.
ret	Int, error code: 0 on success; else, failure.

The API call sequence is as follows: call acl.rt.create_event/acl.rt.create_event_with_flag to create an event -> call acl.rt.record_event to record the start event and end event in the same stream -> call acl.rt.synchronize_stream to block app execution until all tasks in the specified stream are complete -> call acl.rt.event_elapsed_time to collect statistics on the elapsed time between two events.

Parent topic: Event Management