Span

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.

Creates a Span.

Span(const char* spanName, TraceContext& ctx, bool isSampled = true,const char* moduleName = nullptr, bool autoEnd = true)

**Table 1** Parameter description
Parameter	Input/Output	Description
spanName	Input	Span name.
ctx	Input	Trace context.
isSampled	Input	Sampling or not; defaults to true.
moduleName	Input	(Optional) Module name.
autoEnd	Input	Whether to automatically end the trace; defaults to true.

Returns the current Trace context information.

Parent topic: Span Class