Table 40. Processor Settings details(continued)
Option Description
In addition, it can slow access to non-local I/O devices from a
particular processor.
However, if power saving considerations outweigh performance,
reduce the frequency of the processor
communication links. Before reducing the frequency, you must
localize the memory and I/O access to the nearest
NUMA node to minimize the impact to system performance.
Virtualization Technology Enables or disables the virtualization technology for the
processor. This option is set to Enabled by default.
NOTE: When Virtualization Technology is disabled, it also
deactivates the ACS (Access Control Service) function.
Kernel DMA Protection This option is set to Disabled by default. When option is set to
Enabled, BIOS and Operating System will enable direct memory
access protection for DMA capable peripheral devices using
virtualization technology.
Directory Mode Enables or disables the directory mode. 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.
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 Enables or disables the Sub NUMA Cluster. This option is set to
Disabled by default.
MADT Core Enumeration Specifies the MADT Core Enumeration. This option is set
to default in Round Robin. Linear option supports industry
core enumeration whereas, Round Robin option supports Dell
optimized core enumeration.
UMA Based Clustering Status It is a read-only field and displays as Quadrant , when Sub
NUMA Cluster is disabled or displays as Disabled, when Sub
NUMA Cluster is either 2-way or 4-way.
UPI Prefetch Enables you to get the memory read started early on DDR
bus. The Ultra Path Interconnect (UPI) Rx path spawns the
speculative memory that is read to Integrated Memory Controller
(iMC) directly. This option is set to Enabled by default.
XPT Prefetch This option is set to Enabled by default.
LLC Prefetch Enables or disables the LLC Prefetch on all threads. This option
is set to Enabled 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.
Pre-operating system management applications 43
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