Buffer count Sample Clauses

Buffer count. An application should supply at least two buffers to a board. This allows the board to fill one buffer while the application consumes the other. As long as the application can consume buffers faster than the board can fill them, the acquisition can continue indefinitely. However, Microsoft Windows and general-purpose Linux distributions are not real time operating systems. An application thread may be suspended for an indeterminate amount of time to allow other threads with higher priority to run. As a result, buffer processing may take longer than expected. The board is filling AutoDMA buffers with sample data in real time. If an application is unable to supply buffers as fast a board fills them, the board will run out of buffers into which it can transfer sample data. The board can continue to acquire data until it fills is on-board memory, but then it will abort the acquisition and report a buffer overflow error. It is recommended that an application supply three or more buffers to a board. This allows some tolerance for operating system latencies. The programmer may need to increase the number of buffers according to the application. Note that the number of buffers required by a board is not the same as the number of buffers required by an application. There may be little benefit in supplying a board with more than a few tens of buffers, each of a few million samples. If an application requires much more sample data for data analysis or other purposes, the programmer should consider managing application buffers separately from AutoDMA buffers.
Sample 1
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