Advanced Men u – A dvan ced system confi
guration
Hyper-threading
Hyper-threading technology allows a single physical processor to appear as several
logical processors. With this techn ology the operating system can better utilise the internal
processor resources, which in turn leads to increased performance. The advantages of this
technology can only b e used by an operating system which supports ACPI. This setting
has no effect on operating systems which do not support ACPI.
Enabled
An ACPI operating system can use all logical processors within a physical
processor.
Disabled
An ACPI operating system can only use the first logical processor of the physical
processor. This setting should only be u sed if hyper-threading technology has
not been correctly implemented in the ACPI op erating system.
Limit CPUID Functions
With the aid of t his function the user can reduce the CPU functions ( CPUID) . Some
operating systems cannot process new CPUID comma nds which support more than three
functions. This option should be activat ed for these operating systems.
Enabled
For reasons of compatibility with the operating system, only a reduced number of
CPUID functions are supported by the processor.
Disabled
All CPUID function
s are supported.
Core Multi-Proc
essing
For processors that contain several logical processors, all but one logical
processors can be deactivated.
Disabled
All but one logical processors are deactivated.
Enabled All available logical processors are active.
CPUMCStatusClear
When a proc
essor identifies an error, the cause is stored in a status register. Some errors can
be resolve
d immediately, others can lead to a system failure. Now the processor can retain
the MC (Mac
hine 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
The CPU MCA status registers will not be reset by the BIOS.
Enabled
The CPU MCA status registers will be reset by the BIOS during the next
boot process.
Next Boot
The CPU
MCA status registers will be r ese t one-time only by the BIOS during
the nex
t boot process.
28 Fujitsu Technology Solutions