Chapter 2
Installation and Configuration
NI PXIe-8133 User Manual
2-8
ni.com
CPU Configuration Submenu
Use this submenu to apply alternate settings to the CPU. Normally, you do
not need to modify these settings, as the factory default settings provide the
most compatible and optimal configuration possible.
•
Hyper Threading
—This setting enables or disables Intel
Hyper-Threading technology. The default value is
Enabled
. Enabling
Hyper-Threading increases performance for some applications by
adding virtual CPU cores. Hyper-Threading 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, Hyper-Threading will be automatically disabled. In order
to manually enable Hyper-Threading performance when in LabVIEW
Real-Time mode, see the
LabVIEW RT Configuration Overrides
Submenu
.
•
Enabled CPU Cores
—This setting selects the number of active CPU
cores for the processor. Valid values are 4, 2, or 1. The default value is
4
.
•
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. When the BIOS is
configured to boot LabVIEW Real-time, Turbo Boost will be
automatically disabled. In order to manually enable Turbo Boost
performance when in LabVIEW Real-Time mode, see the
LabVIEW
RT Configuration Overrides Submenu
.
•
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. In
order to manually enable C-States when in LabVIEW Real-Time
mode, see the
LabVIEW RT Configuration Overrides Submenu
.
•
Hardware Prefetcher
—This setting enables or disables CPU cache
hardware prefetching. The default value is
Enabled
when booting
LabVIEW Real-Time, enabled when booting other OSs. Enabling
hardware prefetching can increase system performance for some
applications, but can cause control algorithms to behave less
deterministically.
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