Invention Grant
- Patent Title: Systems and methods for adaptive multipath probability (AMP) prefetcher
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Application No.: US16235276Application Date: 2018-12-28
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Publication No.: US11249909B2Publication Date: 2022-02-15
- Inventor: Hanna Alam , Joseph Nuzman
- Applicant: Intel Corporation
- Applicant Address: US CA Santa Clara
- Assignee: Intel Corporation
- Current Assignee: Intel Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Nicholson De Vos Webster & Elliott LLP
- Main IPC: G06F12/00
- IPC: G06F12/00 ; G06F12/0862 ; G06F12/0877 ; G06F12/0897

Abstract:
Systems and methods to predict and prefetch a cache access based on a delta pattern are disclosed. The delta pattern may comprise a sequence of differences between first and second cache accesses within a page. In one example, a processor includes execution circuitry to extract a delta history corresponding to a delta pattern associated with one or more previous cache accesses corresponding to a page of memory. The processor execution circuitry further generates a bucketed delta history based on the delta history corresponding to the page of memory and selects a prediction entry based on the bucketed delta history. The processor execution circuitry then identifies one or more prefetch candidates based on a confidence threshold, with the confidence threshold indicating one or more probable delta patterns, and filters the one or more prefetch candidates. Prefetch circuitry of the processor then predicts and prefetches a cache access based the one or more prefetch candidates.
Public/Granted literature
- US20190138451A1 SYSTEMS AND METHODS FOR ADAPTIVE MULTIPATH PROBABILITY (AMP) PREFETCHER Public/Granted day:2019-05-09
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