Intel Corporation

Hanna Alam

Joseph Nuzman

Sreenivas Subramoney

Alexander Gendler

James G Hermerding, Ii

Lihu Rappoport

Ronak Singhal

Anant V Nori

Adrian C Moga

Sudheer Nair

Niranjan K Soundararajan

Leeor Peled

Shadi T Khasawneh

Prathmesh Kallurkar

Amir Leibovitz

Avishai Wagner

Refael Mizrahi

Ido Karavany

Gilad Olswang

Moran Peri

Ronen Laperdon

Hadas Beja

Michal Moran

Jonathan Beimel

Sabine Francis

Niranjan Kumar Soundararajan

Methods and apparatus relating to de-prioritizing speculative code lines in on-chip caches are described. In an embodiment, logic circuitry determines whether a storage structure includes a reference to a code miss request prior to transmission of the code miss request to a shared cache. The logic circuitry causes de-prioritization of a code line, corresponding to the code miss request, in the shared cache in response to an absence of the reference in the storage structure. Other embodiments are also disclosed and claimed.

De-prioritizing speculative code lines in on-chip caches

In one embodiment, a processor includes: at least one configuration register to store configuration information for a hardware resource including a control circuit to configure the hardware resource based at least in part on the configuration information; a performance monitor to maintain performance information during execution of an application on the processor; and a controller coupled to the at least one configuration register. The controller may dynamically provide the configuration information to the at least one configuration register based at least in part on the performance information, and the control circuit is to adjust a performance tuning of the hardware resource according to the configuration information. Other embodiments are described and claimed.

System, apparatus and method for dynamically configuring one or more hardware resources of a processor

In one embodiment, a processor includes: one or more execution circuits to execute instructions; a stream prediction circuit coupled to the one or more execution circuits, the stream prediction circuit to receive demand requests for information and, based at least in part on the demand requests, generate a page prefetch hint for a first page; and a prefetcher circuit to generate first prefetch requests each for a cache line, the stream prediction circuit decoupled from the prefetcher circuit. Other embodiments are described and claimed.

System, apparatus and method for prefetching physical pages in a processor

Disclosed Methods, Apparatus, and articles of manufacture to dynamically enable and/or disable prefetchers are disclosed. An example apparatus include an interface to access telemetry data, the telemetry data corresponding to a counter of a core in a central processing unit, the counter corresponding to a first phase of a workload executed at the central processing unit; a prefetcher state selector to select a prefetcher state for a subsequent phase based on the telemetry data; and the interface to instruct the core in the central processing unit to operate in the subsequent phase according to the prefetcher state.

Methods and apparatus to dynamically enable and/or disable prefetchers

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.

Systems and methods for adaptive multipath probability (AMP) prefetcher

Growing community of inventors

Jish, Israel

Hanna Alam