Attach

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.

Adds Trace information to the current context.

size_t Attach(const TraceId traceId, const SpanId spanId, const bool isSample = true)

**Table 1** Parameter description
Parameter	Input/Output	Description
traceId	Input	Trace ID.
spanId	Input	Span ID.
isSample	Input	Sampling or not; defaults to true.

Returns the context index, which is used to call Unattach.

Parent topic: TraceContext Class