Activate

For details about the mapping between Ascend AI Processors and Ascend products, see Ascend Product Form Description.

Product	Supported (Yes/No)
Atlas A3 training products/Atlas A3 inference products	x
Atlas A2 training products/Atlas A2 inference products	√
Atlas 200I/500 A2 inference products	x
Atlas inference products	√
Atlas training products	x

For Atlas A2 training products/Atlas A2 inference products, only Atlas 800I A2 inference products are supported.

For Atlas inference products, only the Atlas 300I Duo inference card and Atlas 800 inference server (model 3000) are supported.

Activates a Span and starts timing.

Span& Activate(uint64_t startTime = 0)

**Table 1** Parameter description
Parameter	Input/Output	Description
startTime	Input	Start time. The value 0 indicates the current time.

Returns a reference to the Span class object, which supports chained calls.

Parent topic: Span Class