NEC express5800 A2010b - Page 477

2. Operation Mode
Chapter 4 Appendix
Operation mode
Parameter
([ ]: Default setting)
When
applied
Description
Energy Performance Performance
[Balanced Performance]
Balanced Energy
Energy Efficient
At next boot Specify the priority of operation of processor,
performance or power saving. This option is
displayed only when OS Performance Tuning is
set to Disabled.
Performance: Performance is preferred.
Balanced Performance: Performance and
power-saving are well-balanced. Performance is
preferred rather than Balanced Energy.
Balanced Energy: Performance and
power-saving are well-balanced. Power-saving is
preferred rather than Balanced Performance.
Energy Efficient: Power saving is highest priority.
Turbo Boost Disabled ,
[Enabled]
At next boot Enable or disable Intel(R) Turbo Boost
technology. This item is displayed only when the
installed processor supports this feature. This
option is displayed only when
EIST
is set to
Enabled.
Disabled: Disables the feature.
Enabled: Enables the feature.
Processor Related (Others)
Advanced menu
→
Processor Configuration
Operation mode
Parameter
([ ]: Default setting)
When
applied
Description
DCU IP Prefetcher Disabled
[Enabled]
At next boot Enable or disable the DCU IP prefetch feature of
processor.
Disabled: Disables the feature.
Enabled: The processor prefetches the data with
the highest relevance of the data in use.As a
result, performance may improve.
DCU Streamer
Prefetch
Disabled
[Enabled]
At next boot Enable or disable the DCU Stremer prefetch
feature of processor.
Disabled: Disables the feature.
Enabled: The processor prefetches the data
with the highest relevance of the data within L1
cache by analyzing the cash access pattern.As
a result, performance may improve.
Hardware Prefetcher Disabled
[Enabled]
At next boot Enable or disable the prefetch feature of
hardware.
Disabled: Disables the feature.
Enabled: With the consecutive access to memory
area made within the certain time as a start, the
processor prefetches the memory data in 1st
cache memory which is expected to be accessed
next. As a result, performance may improve.
Adj Cache Line Prefet
(Adjacent Cache Line
Prefetch)
Disabled
[Enabled]
At next boot Enable or disable prefetch feature of LLC (Last
Level Cache).
Disabled: Disables the feature.
Enabled: When loading memory, predict the
adjacent 64B memory is to be loaded, load it at
the same time. As a result, performance may
improve.
Execute Disable Bit Disabled
[Enabled]
At next boot Enable or disable to memory protect feature that
disables illegal program execution. This item is
displayed only when the installed processor
supports this feature.
Disabled: Disables the feature.
Enabled: Enables the feature. OS must support
this feature.
Express5800/A1040b, A2040b, A2020b, A2010b User's Guide
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