Hyper-Threading; Limit Cpuid Functions; Core Multi-Processing; Cpu Mc Status Clear - Fujitsu D2912 Bios Manual

Advanced Menu – Advanced system configuration

Hyper-threading

Hyper-threading technology allows a single physical processor to appear as several
logical processors. With this technology the operating system can better utilise the internal
processor resources, which in turn leads to increased performance. The advantages of this
technology can only be used by an operating system which supports ACPI. This setting
has no effect on operating systems which do not support ACPI.
An ACPI operating system can use all logical processors within a physical
Enabled
processor.
An ACPI operating system can only use the first logical processor of the physical
Disabled
processor. This setting should only be used if hyper-threading technology has
not been correctly implemented in the ACPI operating system.

Limit CPUID Functions

With the aid of this function the user can reduce the CPU functions (CPUID). Some
operating systems cannot process new CPUID commands which support more than three
functions. This option should be activated for these operating systems.
For reasons of compatibility with the operating system, only a reduced number of
Enabled
CPUID functions are supported by the processor.
All CPUID functions are supported.
Disabled

Core Multi-Processing

For processors that contain several logical processors, all but one logical
processors can be deactivated.
All but one logical processors are deactivated.
Disabled
All available logical processors are active.
Enabled

CPU MC Status Clear

When a processor identifies an error, the cause is stored in a status register. Some errors can
be resolved immediately, others can lead to a system failure. Now the processor can retain
the MC (Machine Check) status until switch-off. After a reset, the BIOS can handle this CPU
MC status information during the POST phase and log the detected run-time errors.
Disabled
Enabled
Next Boot
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The CPU MCA status registers will not be reset by the BIOS.
The CPU MCA status registers will be reset by the BIOS during the next
boot process.
The CPU MCA status registers will be reset one-time only by the BIOS during
the next boot process.
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