Activate

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

Product	Supported
Atlas A3 training product/Atlas A3 inference product	x
Atlas A2 training product/Atlas A2 inference product	√
Atlas 200I/500 A2 inference product	x
Atlas inference product	√
Atlas training product	x

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

For Atlas inference product, 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** Parameters
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