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pipeline 音标拼音: [p'ɑɪpl,ɑɪn] n. 管道线 管道线 pipeline 管道;流水线;管线 pipeline 管线 pipeline n 1: gossip spread by spoken communication; "the news of their affair was spread by word of mouth" [synonym: {grapevine}, {pipeline}, {word of mouth}] 2: a pipe used to transport liquids or gases; "a pipeline runs from the wells to the seaport" [synonym: {pipeline}, {line}] pipeline \pipeline\, pipe line \pipe line\ 1. A line of pipe with pumping machinery and apparatus for conveying liquids, gases, or finely divided solids, such as petroleum or natural gas, between distant points. [Webster 1913 Suppl. PJC] 2. fig. an information channel direct from the source. [PJC] 3. the set of stages and processes from the invention or design of a product to its ultimate use, production, or commercial sale. Used commonly in the phrase {in the pipeline}, i. e. still in preparation or under development. [PJC] Pipe-line \Pipe"-line`\, v. t. To convey by a pipe line; to furnish with a pipe line or pipe lines. [Webster 1913 Suppl.] 67 Moby Thesaurus words for "pipeline": adjutage, bush telegraph, catheter, channel, coming, conduit, confidential information, connection, contact, conveyor, cooking, drainpipe, duct, efflux tube, fire hose, flue pipe, flume, funnel, garden hose, gas pipe, grapevine, grapevine telegraph, hose, hosepipe, imminent, in the offing, in the works, inside dope, inside information, insider, line, main, nipple, on the way, organ pipe, origin, passage, pipe, pipette, piping, put through channels, ready, reed, reed pipe, siamese, siamese connection, siphon, snorkel, soil pipe, source, standpipe, steam pipe, stem, straw, supplier, tap, the lowdown, tube, tubing, tubulation, tubule, tubulet, tubulure, under way, waste pipe, water pipe, wellspring which performs a task in several steps, like an assembly line in a factory. Each functional unit takes inputs and produces outputs which are stored in its output {buffer}. One stage's output buffer is the next stage's input buffer. This arrangement allows all the stages to work in parallel thus giving greater throughput than if each input had to pass through the whole pipeline before the next input could enter. The costs are greater latency and complexity due to the need to synchronise the stages in some way so that different inputs do not interfere. The pipeline will only work at full efficiency if it can be filled and emptied at the same rate that it can process. Pipelines may be synchronous or asynchronous. A synchronous pipeline has a master clock and each stage must complete its work within one cycle. The minimum clock period is thus determined by the slowest stage. An asynchronous pipeline requires {handshaking} between stages so that a new output is not written to the interstage buffer before the previous one has been used. Many {CPUs} are arranged as one or more pipelines, with different stages performing tasks such as fetch instruction, decode instruction, fetch arguments, arithmetic operations, store results. For maximum performance, these rely on a continuous stream of instructions fetched from sequential locations in memory. Pipelining is often combined with {instruction prefetch} in an attempt to keep the pipeline busy. When a {branch} is taken, the contents of early stages will contain instructions from locations after the branch which should not be executed. The pipeline then has to be flushed and reloaded. This is known as a {pipeline break}. (1996-10-13)
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