mstxRangeStartA

mstxRangeId mstxRangeStartA(const char *message, aclrtStream stream);

Indicates the start of a time segment event.

**Table 1** Parameters
Parameter	Input/Output	Description
message	Input	Pointer to the marking that carries a message string. The length of the input message string cannot exceed 128 bytes.
stream	Input	Stream for executing marking tasks. If this parameter is set to nullptr, only instantaneous events on the host are marked. Marks instantaneous events on the host and device when a valid stream is configured.

range_id: Range ID. If the operation fails, 0 is returned.

Parent topic: mstx API Reference