Dell E05B001 Referenzhandbuch - Seite 10

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Processor Settings

You can use the Processor Settings screen to view the processor settings, and perform specific functions such as enabling

virtualization technology, hardware prefetcher, logical processor idling, and opportunistic self-refresh.

View Processor Settings

To view the Processor Settings screen, perform the following steps:

Steps

1. Turn on, or restart your system.

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 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.

CPU

Enables you to govern the frequency of the communication links among the CPUs 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 nonlocal memory accesses and cache coherency traffic. In addition,

it can slow access to nonlocal I/O devices from a particular CPU.

However, if power-saving considerations outweigh performance, you might want to reduce the frequency

of the CPU 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

DCU Streamer

Enables or disables the Data Cache Unit (DCU) streamer prefetcher. This option is set to Enabled by

Prefetcher

default.

BIOS and UEFI

NOTE:

The standard and basic bin processors support lower link frequencies.