Dell 5WC10 Installation And Service Manual page 46

2. Press F2 immediately after you see the following message:
F2 = System Setup
NOTE: If your operating system begins to load before you press F2, wait for the system to finish booting, and then
restart your system and try again.
3. On the System Setup Main Menu screen, click System BIOS.
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
Enables or disables the logical processors and displays the number of logical processors. If this option is
Processor
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.
CPU Enables you to govern the frequency of the communication links among the processors in the system.
Interconnect
Speed
The options available are Maximum data rate, 10.4 GT/s, and 9.6 GT/s. This option is set to Maximum
data rate by default.
Maximum data rate indicates that the BIOS runs the communication links at the maximum frequency that
is supported by the processors. You can also select specific frequencies that the processors support,
which can vary.
For best performance, you should select Maximum data rate. Any reduction in the communication link
frequency affects the performance of non-local memory accesses and cache coherency traffic. Besides,
it can slow access to non-local I/O devices from a particular processor.
However, if power-saving considerations outweigh performance, you might want to reduce the frequency
of the processor communication links. If you do this, you should localize memory and I/O accesses to the
nearest NUMA node to minimize the impact to system performance.
Virtualization Enables or disables the virtualization technology for the processor. This option is set to Enabled by
Technology default.
Adjacent Cache Optimizes the system for applications that need high utilization of sequential memory access. This option
Line Prefetch is set to Enabled by default. You can disable this option for applications that need high utilization of
random memory access.
Hardware Enables or disables the hardware prefetcher. This option is set to Enabled by default.
Prefetcher
Software Enables or disables the software prefetcher. This option is set to Enabled by default.
Prefetcher
DCU Streamer Enables or disables the Data Cache Unit (DCU) streamer prefetcher. This option is set to Enabled by
Prefetcher default.
DCU IP Enables or disables the Data Cache Unit (DCU) IP prefetcher. This option is set to Enabled by default.
Prefetcher
Sub NUMA Sub NUMA Clustering (SNC) is a feature for breaking up the LLC into disjoint clusters based on address
Cluster 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.
46 Pre-operating system management applications
NOTE: The standard and basic bin processors support lower link frequencies.