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In architecture, the term "bubble chart" is also applied to a first architectural sketch of the layout constructed with bubbles. [ 5 ] In software engineering , "bubble chart" can refer to a data flow , a data structure or other diagram in which entities are depicted with circles or bubbles and relationships are represented by links drawn ...
Such an event is often called a bubble, by analogy with an air bubble in a fluid pipe. In some architectures, the execution stage of the pipeline must always be performing an action at every cycle. In that case, the bubble is implemented by feeding NOP ("no operation") instructions to the execution stage, until the bubble is flushed past it.
insert a pipeline bubble whenever a read after write (RAW) dependency is encountered, guaranteed to increase latency, or; use out-of-order execution to potentially prevent the need for pipeline bubbles; use operand forwarding to use data from later stages in the pipeline; In the case of out-of-order execution, the algorithm used can be:
Example of a system context diagram. [14] Context diagrams are diagrams that represent the actors outside a system that could interact with that system. [15] This diagram is the highest level view of a system, similar to block diagram, showing a, possibly software-based, system as a whole and its inputs and outputs from/to external factors.
In computer engineering, instruction pipelining is a technique for implementing instruction-level parallelism within a single processor. Pipelining attempts to keep every part of the processor busy with some instruction by dividing incoming instructions into a series of sequential steps (the eponymous "pipeline") performed by different processor units with different parts of instructions ...
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Activity diagrams [1] are graphical representations of workflows of stepwise activities and actions [2] with support for choice, iteration, and concurrency. In the Unified Modeling Language, activity diagrams are intended to model both computational and organizational processes (i.e., workflows), as well as the data flows intersecting with the related activities.