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branch prediction |
Also found in: Wikipedia | 0.12 sec. |
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In CPU instruction execution, predicting the outcome of a branch so that those instructions may be executed in parallel with the current instructions. If the CPU guesses the wrong branch, it will take extra machine cycles to go back and execute the correct one; however, on average, if the prediction algorithms are good, overall performance is increased. See predication and branch.
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| Similarly, floating-point, computationally intensive tasks will gain some performance from both faster clock speeds and from the chip's internal branch prediction mechanisms (as well as from RDRAM, if used). The ARC 750D configurable RISC core includes features such as a high performance 7 stage pipeline, dynamic branch prediction unit and a memory management unit for Embedded Linux and other high-end operating systems. ARC was able to achieve clock speeds of 400MHz and above through a sophisticated pipeline structure that supports out-of-order completion, non-blocking access, 2-level hit-under-miss scheduling, and configurable dynamic branch prediction for maximum throughput. |
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