NEC Express5800/R120h-2M Maintenance Manual page 78

Chapter 2 Useful Features
(2)
Processor Options Menu
When you select System Configuration > BIOS/Platform Configuration (RBSU) > Processor Options from
the System Utilities, the Processor Options menu appears.
For details about the options, see the table below.
Option
Intel(R)
Hyper-Threading
Enabled Cores per
Processor
Processor x2APIC
Support
78
Parameter
Disabled Use this option to enable or disable Intel
[Enabled] Hyper-Threading. When enabled, each physical
processor core operates as two logical processor cores.
When disabled, each physical processor core operates
as one logical processor core. Enabling this option can
improve overall performance for applications that benefit
from a higher processor core count.
This appears only when the processor that supports this
function is mounted. This option is displayed only when
the installed processor supports this feature.
[0]-X This option enables limiting the number of enabled
processor cores per physical processor. You can set the
number of enabled cores to a value supported by the
physical processor. Setting the value to 0 or a value
larger than the number of supported cores of the
installed processor will result in all processor cores in the
socket being enabled.
[Enabled] x2APIC support enables operating systems to run more
Force Enabled efficiently on high core count configurations. It also
Disabled optimizes interrupt distribution in virtualized
environments. In most cases, set this option to enabled.
This configures the operating system to optionally enable
x2APIC support when it loads. Some older hypervisors
and operating systems might have issues with optional
x2APIC support, in which case disabling x2APIC might
be necessary to address those issues. Additionally,
some hypervisors and operating systems will not use
X2APIC unless this option is set to Force Enabled prior
to booting. The Force Enabled option also causes the
Intel(R) VT-d setting to be set to enabled.
Express5800/R120h-1M, R120h-2M Maintenance Guide
1. System Utilities
Description
[ ]: Default setting