Intel Hyper-Threading
Technology
|
Whether the processor uses
Intel Hyper-Threading Technology, which allows multithreaded software
applications to execute threads in parallel within each processor. This can be
one of the following:
-
Disabled—The processor does not permit
hyperthreading.
-
Enabled—The processor allows for the parallel
execution of multiple threads.
We recommend that you
contact your operating system vendor to make sure the operating system supports
this feature.
|
Number of Enabled
Cores
|
Allows you to disable one or more of the physical cores on the
server. This can be one of the following:
-
All—Enables all physical cores. This also enables
Hyper Threading on the associated logical processor cores.
-
1 through
n—Specifies the number of physical
processor cores that can run on the server. Each physical core has an
associated logical core.
We recommend that you contact your operating system vendor to
make sure the operating system supports this feature.
|
Execute
Disable
|
Classifies memory areas on the server to specify where
application code can execute. As a result of this classification, the processor
disables code execution if a malicious worm attempts to insert code in the
buffer. This setting helps to prevent damage, worm propagation, and certain
classes of malicious buffer overflow attacks. This can be one of the following:
-
Disabled—The processor does not classify memory
areas.
-
Enabled—The processor classifies memory areas.
We recommend that you contact your operating system vendor to
make sure the operating system supports this feature.
|
Intel VT
|
Whether the processor uses Intel Virtualization Technology (VT),
which allows a platform to run multiple operating systems and applications in
independent partitions. This can be one of the following:
-
Disabled—The processor does not permit
virtualization.
-
Enabled—The processor allows multiple operating
systems in independent partitions.
Note
|
If you
change this option, you must power cycle the server before the setting takes
effect.
|
|
Intel VT-d
|
Whether the processor uses Intel Virtualization Technology for
Directed I/O (VT-d). This can be one of the following:
-
Disabled—The processor does not use virtualization
technology.
-
Enabled—The processor uses virtualization
technology.
|
Intel VT-d Coherency
Support
|
Whether the processor supports Intel VT-d Coherency. This can be
one of the following:
-
Disabled—The processor does not support coherency.
-
Enabled—The processor uses VT-d Coherency as
required.
|
Intel VT-d ATS
Support
|
Whether the processor
supports Intel VT-d Address Translation Services (ATS). This can be one of the
following:
-
Disabled—The processor does not support ATS.
-
Enabled—The processor uses VT-d ATS as required.
|
CPU
Performance
|
Sets the CPU performance profile for the server. The performance
profile consists of the following options:
-
DCU
Streamer Prefetcher
-
DCU IP
Prefetcher
-
Hardware Prefetcher
-
Adjacent Cache-Line Prefetch
This can be one of the
following:
-
Enterprise—All options are enabled.
-
High
Throughput—Only the DCU IP Prefetcher is
enabled. The rest of the options are disabled.
-
HPC—All options are enabled. This setting is also
known as high performance computing.
-
Custom—All performance profile options can be
configured from the BIOS setup on the server. In addition, the Hardware
Prefetcher and Adjacent Cache-Line Prefetch options can be configured in the
fields below.
|
Hardware
Prefetcher
|
Whether the processor allows the Intel hardware prefetcher to
fetch streams of data and instruction from memory into the unified second-level
cache when necessary. This can be one of the following:
-
Disabled—The hardware prefetcher is not used.
-
Enabled—The processor uses the hardware prefetcher
when cache issues are detected.
|
Adjacent Cache Line
Prefetcher
|
Whether the processor
fetches cache lines in even/odd pairs instead of fetching just the required
line. This can be one of the following:
-
Disabled—The processor only fetches the required
line.
-
Enabled— The processor fetches both the required
line and its paired line.
|
DCU Streamer
Prefetch
|
Whether the processor uses the DCU IP Prefetch mechanism to
analyze historical cache access patterns and preload the most relevant lines in
the L1 cache. This can be one of the following:
-
Disabled—The processor does not try to anticipate
cache read requirements and only fetches explicitly requested lines.
-
Enabled—The DCU prefetcher analyzes the cache read
pattern and prefetches the next line in the cache if it determines that it may
be needed.
|
DCU IP
Prefetcher
|
Whether the processor uses the DCU IP Prefetch mechanism to
analyze historical cache access patterns and preload the most relevant lines in
the L1 cache. This can be one of the following:
-
Disabled—The processor does not preload any cache
data.
-
Enabled—The DCU IP prefetcher preloads the L1 cache
with the data it determines to be the most relevant.
|
Direct Cache Access
Support
|
Allows processors to increase I/O performance by placing data
from I/O devices directly into the processor cache. This setting helps to
reduce cache misses. This can be one of the following:
-
Disabled—Data from I/O devices is not placed
directly into the processor cache.
-
Enabled—Data from I/O devices is placed directly
into the processor cache.
|
Power
Technology
|
Enables you to configure the CPU power management settings for
the following options:
-
Enhanced Intel Speedstep Technology
-
Intel
Turbo Boost Technology
-
Processor Power State C6
Power Technology can be one
of the following:
-
Custom—The server uses the individual settings for
the BIOS parameters mentioned above. You must select this option if you want to
change any of these BIOS parameters.
-
Disabled—The server does not perform any CPU power
management and any settings for the BIOS parameters mentioned above are
ignored.
-
Energy Efficient—The server determines the best
settings for the BIOS parameters mentioned above and ignores the individual
settings for these parameters.
|
Enhanced Intel Speedstep
Technology
|
Whether the processor uses Enhanced Intel SpeedStep Technology,
which allows the system to dynamically adjust processor voltage and core
frequency. This technology can result in decreased average power consumption
and decreased average heat production. This can be one of the following:
-
Disabled—The processor never dynamically adjusts its
voltage or frequency.
-
Enabled—The processor utilizes Enhanced Intel
SpeedStep Technology and enables all supported processor sleep states to
further conserve power.
We recommend that you contact your operating system vendor to
make sure the operating system supports this feature.
Note
|
Power
Technology must be set to
Custom or the server ignores the setting for this
parameter.
|
|
Intel Turbo Boost
Technology
|
Whether the processor uses Intel Turbo Boost Technology, which
allows the processor to automatically increase its frequency if it is running
below power, temperature, or voltage specifications. This can be one of the
following:
-
Disabled—The processor does not increase its
frequency automatically.
-
Enabled—The processor utilizes Turbo Boost
Technology if required.
Note
|
Power
Technology must be set to
Custom or the server ignores the setting for this
parameter.
|
|
Processor Power State
C6
|
Whether the BIOS sends the C6 report to the operating system.
When the OS receives the report, it can transition the processor into the lower
C6 power state to decrease energy usage while maintaining optimal processor
performance. This can be one of the following:
-
Disabled—The BIOS does not send the C6 report.
-
Enabled—The BIOS sends the C6 report, allowing the
OS to transition the processor to the C6 low power state.
Note
|
Power
Technology must be set to
Custom or the server ignores the setting for this
parameter.
|
|
Processor Power State C1
Enhanced
|
Whether the CPU transitions to its minimum frequency when entering the C1
state. This can be one of the following:
-
Disabled—The CPU continues to run at its maximum
frequency in C1 state.
-
Enabled—The CPU transitions to its minimum
frequency. This option saves the maximum amount of power in C1 state.
|
Frequency Floor
Override
|
Whether the CPU is allowed to drop below the maximum non-turbo
frequency when idle. This can be one of the following:
-
Disabled— The CPU can drop below the maximum
non-turbo frequency when idle. This option decreases power consumption but may
reduce system performance.
-
Enabled— The CPU cannot drop below the maximum
non-turbo frequency when idle. This option improves system performance but may
increase power consumption.
|
P-STATE
Coordination
|
Allows you to define how BIOS communicates the P-state support
model to the operating system. There are 3 models as defined by the Advanced
Configuration and Power Interface (ACPI) specification.
-
HW_ALL—The processor hardware is responsible for
coordinating the P-state among logical processors with dependencies (all
logical processors in a package).
-
SW_ALL—The OS Power Manager (OSPM) is responsible
for coordinating the P-state among logical processors with dependencies (all
logical processors in a physical package), and must initiate the transition on
all of the logical processors.
-
SW_ANY—The OS Power Manager (OSPM) is responsible
for coordinating the P-state among logical processors with dependencies (all
logical processors in a package), and may initiate the transition on any of the
logical processors in the domain.
Note
|
Power
Technology must be set to
Custom or the server ignores the setting for this
parameter.
|
|
Energy
Performance
|
Allows you to determine whether system performance or energy
efficiency is more important on this server. This can be one of the following:
-
Balanced
Energy
-
Balanced
Performance
-
Energy
Efficient
-
Performance
|