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    What do you mean by Predictive FIFO?

    Hi,

    Can anyone help to explain what a predictive FIFO refers to.
    Thanks.

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    Re: What do you mean by Predictive FIFO?

    Hi,

    we need some context.

    Where did you read about it? Give a link.

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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  3. #3
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    Re: What do you mean by Predictive FIFO?

    To increase speed of execution in high performance CPU's, one bottleneck is the "slow" memory access time. So cpu's prefetch the next several instructions from ram in sequential manner.

    However it is not necessary that the next few instructions will be in sequence - there could be a conditional jump somewhere. If that happens then entire prefetched opcodes are wasted.

    To improve this scenario, some prefetch methods try to 'predict' which path instruction sequence will take, and fill the fifo with those.

    That's my theory.

    - - - Updated - - -

    This could be used for other systems where fore-knowledge of next required data is beneficial.



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