Reference Guide

4. On the System BIOS screen, click Processor Settings.
Processor Settings details
About this task
The Processor Settings screen details are explained as follows:
Option Description
Logical Processor
Enables or disables the logical processors and displays the number of logical processors. If this option is
set to Enabled, the BIOS displays all the logical processors. If this option is set to Disabled, the BIOS
displays only one logical processor per core. This option is set to Enabled by default.
Virtualization
Technology
Enables or disables the virtualization technology for the processor. This option is set to Enabled by
default.
Adjacent Cache
Line Prefetch
Optimizes the system for applications that need high utilization of sequential memory access. This option
is set to Enabled by default. You can disable this option for applications that need high utilization of
random memory access.
Hardware
Prefetcher
Enables or disables the hardware prefetcher. This option is set to Enabled by default.
Software
Prefetcher
Enables or disables the software prefetcher. This option is set to Enabled by default.
DCU Streamer
Prefetcher
Enables or disables the Data Cache Unit (DCU) streamer prefetcher. This option is set to Enabled by
default.
DCU IP
Prefetcher
Enables or disables the Data Cache Unit (DCU) IP prefetcher. This option is set to Enabled by default.
Sub NUMA
Cluster
Sub NUMA Clustering (SNC) is a feature for breaking up the LLC into disjoint clusters based on address
range, with each cluster bound to a subset of the memory controllers in the system. It improves average
latency to the LLC. Enables or disables the Sub NUMA Cluster. This option is set to Disabled by default.
UPI Prefetch Enables you to get the memory that is read started early on DDR bus. The Ultra Path Interconnect (UPI)
Rx path will spawn the speculative memory that is read to Integrated Memory Controller (iMC) directly.
This option is set to Enabled by default.
LLC Prefetch Enables or disables the LLC Prefetch on all threads. This option is set to Disabled by default.
Dead Line LLC
Alloc
Enables or disables the Dead Line LLC Alloc. This option is set to Enabled by default. You can enable this
option to enter the dead lines in LLC or disable the option to not enter the dead lines in LLC.
Directory AtoS Enables or disables the Directory AtoS. AtoS optimization reduces remote read latencies for repeat read
accesses without intervening writes. This option is set to Disabled by default.
Logical Processor
Idling
Enables you to improve the energy efficiency of a system. It uses the operating system core parking
algorithm and parks some of the logical processors in the system which in turn allows the corresponding
processor cores to transition into a lower power idle state. This option can only be enabled if the
operating system supports it. It is set to Disabled by default.
Configurable TDP Enables you to configure the TDP level. The available options are Nominal, Level 1, and Level 2. This
option is set to Nominal by default.
NOTE: This option is only available on certain stock keeping units (SKUs) of the processors.
x2APIC Mode Enables or disables the x2APIC mode. This option is set to Enabled by default.
Dell Controlled
Turbo
Controls the turbo engagement. . This option is set to Disabled by default.
NOTE: Depending on the number of installed processors, there might be up to two processor listings.
Dell AVX Scaling
Technology
Enables you to configure the Dell AVX scaling technology. This option is set to 0 by default.
Number of Cores
per Processor
Controls the number of enabled cores in each processor. This option is set to All by default.
Pre-operating system management applications 9