| 词汇 | prefetch |
| 释义 | BETA Examples of prefetchprefetch isn’t in the Cambridge Dictionary yet. You can help! Prefetch was increased from 4 to 8 bits. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These processors are relatively costlier than their counterparts without the prefetch input queue. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. If an instruction does not need data from memory (for example, arithmetic operations), the instruction will prefetch a word of instructions. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The host machine's prefetch mechanisms are unable to predict and fetch the target of that indexed or indirect jump. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A more general advantage of increased density is improved effectiveness of caches and instruction prefetch. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This includes loop interchange, loop fusion, loop unrolling, loop distribution, data prefetch, and more. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The guess allows the hardware to prefetch instructions without waiting for the register read. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There was a separate prefetch/instruction formatting unit (again, using stoppable delay line clocks for synchronization... asynchronous logic allows for skewed timings). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This is achieved by pre-loading machine code from memory into a "prefetch input queue". From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Earlier chips did not support the dummy channel or pair prefetch, and used a different encoding for precharge. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. They also mean that instruction prefetch can be performed in parallel with other activities. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Alternatively, the prefetch may be part of a complex branch prediction algorithm, where the processor tries to anticipate the result of a calculation and fetch the right instructions in advance. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Additional commands prefetch a pair of segments to a pair of channels, and an optional command combines prefetch, read, and precharge to reduce the overhead of random reads. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. With the speed of instruction fetch reduced by 50% in the 8088 as compared to the 8086, a sequence of fast instructions can quickly drain the 4-byte prefetch queue. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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