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I am working on an image processing application which is built with tbb::flow_graph. The input comes from a video file or a camera. Each image processing node is wrapped in a multifunction_node (I need the multifunction_node's ability to selectively stop propagating graph messages). Currently I am using graph.wait_for_all() after feeding each input frame into the root node, but I would like to be able to take advantage of pipeline parallelism. I.e. if node A is connected to node B, I would like to let node A start working on its next input after it is done producing its output, instead of waiting for B to finish.

Could you please provide cues for how to do this efficiently and idiomatically? I am new to TBB and I feel that I might be missing something obvious.

Michael
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    Please add some code to show what exactly you have tried. – krjw May 03 '20 at 13:10
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    The TBB documentation has examples of flow graphs that use pipeline parallelism, e.g. here: https://www.threadingbuildingblocks.org/docs/help/tbb_userguide/Data_Flow_Graph.html – Alexey Kukanov May 03 '20 at 14:23

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