SpanStart

For details about the mapping between 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.

Records the start node of a process.

Profiler &SpanStart(const char *spanName, bool autoEnd = true)

**Table 1** Parameters
Parameter	Input/Output	Description
spanName	Input	Span name.
autoEnd	Input	(Optional) Whether to enable the auto-end call. It is enabled by default.

Profiler &Current object. Chain calls are supported.

Parent topic: Serving Tuning