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Control of pre-fetch traffic

  • US 9,658,962 B2
  • Filed: 01/13/2014
  • Issued: 05/23/2017
  • Est. Priority Date: 01/15/2013
  • Status: Active Grant
First Claim
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1. A method of controlling traffic generated by a processor, the method comprising:

  • attaching, at the processor, a pre-fetch identifier to a pre-fetch request to flag the pre-fetch request as a pre-fetch request, rather than a non-pre-fetch request, the pre-fetch request requesting an item from a memory hierarchy, wherein the item comprises a piece of data or an instruction;

    transmitting the pre-fetch request from the processor to the memory hierarchy; and

    in response to receiving, at the processor, an abort response corresponding to the pre-fetch request, removing at least a portion of data stored locally to the processor relating to the pre-fetch request, wherein the abort response is received at the processor from the memory hierarchy and the abort response is generated by a node of the memory hierarchy based on the pre-fetch identifier.

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