SPEC CPU2017 Platform Settings for Intel R2000WF series
- Last Level Cache (LLC) Prefetch
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The LLC prefetcher is a new prefetcher added to Skylake-SP as a result of the non-inclusive cache architecture. The LLC prefetcher is an additional prefetch mechanism on top of the existing prefetchers that prefetch data into the core Data Cache Unit (DCU) and Mid-Level Cache (MLC). Enabling LLC prefetch gives the core prefetcher the ability to prefetch data directly into the LLC without necessarily filling into the MLC. In some cases, setting this option to disabled can improve performance. Values for this BIOS option can be:
- Disabled (default option): Disables the LLC prefetcher. The other core prefetchers are unaffected.
- Enabled (recommended option): Gives the core prefetcher the ability to prefetch data directly to the LLC.
- Energy/Performance Bias Recommendation for Latency-Sensitive Applications
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Energy Performance Bias should be set to either “Performance” to optimize latency or “Balanced Performance” to weigh optimization toward performance while conserving energy.
- Balanced Performance - default option.
- Performance - recommended option.
- XPT Prefetch
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The Xtended Prediciton Table (XPT) prefetcher exists on top of other prefetchers that that can prefetch data in the core DCU, MLC, and LLC. The XPT prefetcher will issue a speculative DRAM read request in parallel to an LLC lookup. This prefetch bypasses the LLC, saving latency.
- Auto - default option.
- Enabled - recommended option.
- Memory RAS and Performance: Sub-NUMA Cluster (SNC) Configuration
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Sub-NUMA Cluster (SNC) is a feature that provides similar localization benefits as Cluster-On-Die (COD), a feature found in previous processor families, without some of COD’s downsides.
- Disabled - default option.
- Enabled - recommended option.
- System Acoustic and Performance: Set Fan Profile
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The System Acoustic and Performance Configuration screen allows the user to configure the thermal control behavior of the system with respect to what parameters are used in the system's FanSpeed Control algorithms.
- Acoustic - default option.
- Performance - recommended option.