© National Instruments
|
2-7
NI PXIe-8880 User Manual
•
Enabled CPU Cores
—This setting selects the number of active CPU cores for the
processor. Valid values are
All
,
7
,
6
,
5
,
4
,
3
,
2
, or
1
. The default value is
All
.
•
Turbo Boost
—This setting enables or disables Intel Turbo Boost technology. The default
value is
Enabled
. Enabling Turbo Boost allows CPU cores to run at higher than their base
frequency for short durations, while other cores are idle. Enabling Turbo Boost can also
increase application jitter, so care should be taken when enabling this setting on a Real Time
system. To achieve maximum possible Turbo Boost frequencies, also enable the C-States
setting.
•
C-States
—This setting enables or disables CPU power management. The default value is
Enabled
. Enabling C-States allows the processor to put idle CPU cores to sleep, allowing
active cores to run at higher than base frequencies when Turbo Boost is enabled. Enabling
C-States can increase application jitter, so care should be taken when enabling this setting
on a Real Time system. When the BIOS is configured to boot LabVIEW Real-Time,
C-States will be automatically disabled.
•
Hardware Prefetcher
—This setting enables or disables CPU cache hardware prefetching.
The default value is
Enabled
. Enabling hardware prefetching can increase system
performance for some applications, but can cause control algorithms to behave less
deterministically.
•
Adjacent Cache Prefetcher
—This setting enables or disables prefetching of adjacent
cache lines from memory to the CPU cache. The default value is
Enabled
. Enabling
adjacent cache line prefetching can increase system performance for some applications, but
can cause control algorithms to behave less deterministically.
•
Data Cache Unit (DCU) Prefetcher
—This setting enables or disables prefetching of the
next cache line when accessing very recently used data in an ascending fashion. The default
value is
Enabled
. Enabling DCU prefetching can increase system performance for some
applications, but can cause control algorithms to behave less deterministically.
•
Intel VT-d
—This setting enables or disables Intel
®
Virtualization Technology for Directed
I/O (VT-d). The default value is
Enabled
. Enabling VT-d provides enhanced I/O
virtualization support, but can cause control algorithms to behave less deterministically.
Video Configuration Submenu
Use this submenu to apply alternate settings to the video configuration. Normally, you do not
need to modify these settings, as the factory default settings provide the most compatible and
optimal configuration possible.
•
Primary Display
—This setting specifies which video adapter the BIOS should use as the
primary adapter if more than one is present. To use an external video adapter as the primary
graphics adapter, choose
Add-in Board Video
. The default value is
Onboard Video
.
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