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Inserts a 64-bit timestamp value from a high-precision timing source into a preallocated array at an index value specified by iteration. The timestamp value indicates the time when the RT Get Timestamp VI executes on the RT target.

Use the RT Timestamp Analysis VI to analyze the timestamp array returned by the RT Get Timestamp VI.

Details  

	timestamp array in specifies the preallocated array used to store timestamps for each iteration of the RT Get Timestamp VI. You must preallocate an array with enough elements to store all of the timestamps you want to collect.
	iteration specifies the index value where the RT Get Timestamp VI inserts the current timestamp in the timestamp array. Wire a loop iteration terminal to index the timestamps relative to their execution order.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	timestamp array out returns an array that contains a timestamp for each iteration of the RT Get Timestamp VI.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

RT Get Timestamp Details

You can use the RT Get Timestamp VI in a For or While Loop to benchmark code. However, you must ensure that the RT Get Timestamp VI executes in the benchmarking application at the same point relative to the code for each iteration. The example in the following figure uses the Flat Sequence structure to ensure that the RT Get Timestamp VI always executes before the code you want to benchmark.

You also must preallocate the timestamp array that you wire to timestamp array in to avoid memory allocations that can affect the timestamp value.