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Hardware scout is a technique that uses ot … Hardware scout is a technique that uses otherwise idle processor execution resources to perform prefetching during cache misses. When a thread is stalled by a cache miss, the processor pipeline checkpoints the register file, switches to runahead mode, and continues to issue instructions from the thread that is waiting for memory. The thread of execution in run-ahead mode is known as a scout thread. When the data returns from memory, the processor restores the register file contents from the checkpoint, and switches back to normal execution mode. The computation during run-ahead mode is discarded by the processor; nevertheless, scouting provides speedup because memory level parallelism (MLP) is increased. The cache lines brought into the cache hierarchy are often used by the processor again when it switches back to normal mode.gain when it switches back to normal mode.
, 硬件侦测（Hardware Scout），亦称硬件侦测或硬件侦察，是指一种无需应用程序及操作系统干预，由硬件（处理器）来分发线程执行任务，从而加速程序执行的技术。
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硬件侦测（Hardware Scout），亦称硬件侦测或硬件侦察，是指一种无需应用程序及操作系统干预，由硬件（处理器）来分发线程执行任务，从而加速程序执行的技术。
, Hardware scout is a technique that uses ot … Hardware scout is a technique that uses otherwise idle processor execution resources to perform prefetching during cache misses. When a thread is stalled by a cache miss, the processor pipeline checkpoints the register file, switches to runahead mode, and continues to issue instructions from the thread that is waiting for memory. The thread of execution in run-ahead mode is known as a scout thread. When the data returns from memory, the processor restores the register file contents from the checkpoint, and switches back to normal execution mode.nd switches back to normal execution mode.
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Hardware scout
, 硬件侦测
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