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RUNAHEAD

Runahead

Microprocessing technique

Runahead is a technique that allows a computer processor to speculatively pre-process instructions during cache miss cycles. The pre-processed instructions

Runahead

Speculative execution

Computer optimization technique

prediction. A generalized form is sometimes referred to as value prediction. Runahead is a technique that allows a computer processor to speculatively pre-process

Speculative execution

Speculative_execution

Hardware scout

miss, the processor pipeline checkpoints the register file, switches to runahead mode, and continues to issue instructions from the thread that is waiting

Hardware scout

Hardware_scout

Onur Mutlu

Turkish computer scientist

accesses by keeping a row open for a long time. Processing in memory, runahead execution, and predicting memory and branching behavior are also among

Onur Mutlu

Onur_Mutlu

Memory-level parallelism

Computer architecture feature

code. Memory disambiguation Memory dependence prediction Hardware scout Runahead Glew, A. (1998). "MLP yes! ILP no!". ASPLOS Wild and Crazy Idea Session

Memory-level parallelism

Memory-level_parallelism

ARM Cortex-A77

Microprocessor core model

power-efficient cores. Front-end Branch-prediction Better accuracy Up to 64B runahead window (From 32B) Increase L1 BRB capacity, up to 64-entry (From 16-entry)

ARM Cortex-A77

ARM_Cortex-A77

Trevor Mudge

American university teacher

as proof of concept. Mudge and his colleagues developed the concept of runahead. He has shown the effectiveness of point-to-point crossbars for systems

Trevor Mudge

Trevor_Mudge