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Pipelines that operate on buffers often work well to mitigate the high
latency inherent in interprocessor communication and in accessing data
on disk. Running a single pipeline on each node works well when each
pipeline stage consumes and produces data at the same rate. If a
stage might consume data faster or slower than it produces data, a
single pipeline becomes unwieldy.
We describe how we have extended the FG programming environment to support multiple pipelines in two forms. When a node might send and receive data at different rates during interprocessor communication, we use disjoint pipelines that send and receive on each node. When a node consumes and produces data from different streams on the node, we use multiple pipelines that intersect at a particular stage. Experimental results for two out-of-core sorting algorithms---one based on columnsort and the other a distribution-based sort---demonstrate the value of multiple pipelines.
Bibliographic citation for this report: [plain text] [BIB] [BibTeX] [Refer]
Or copy and paste:
Thomas H. Cormen, Priya Natarajan, and Elena Riccio Davidson, "When One Pipeline Is Not Enough." Dartmouth Computer Science Technical Report TR2007-596, June 2007.
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