1. System Utilities
Express5800/R120h-1M, R120h-2M Maintenance Guide
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Chapter 2 Useful Features
(a) Processor Prefetcher Options Menu
When you select
System Configuration
>
BIOS/Platform Configuration (RBSU)
>
Power and Performance
Options
>
Processor Prefetcher Options
from the System Utilities, the
Processor Prefetcher Options
menu
appears.
For details about the options, see the table below.
Option
Parameter Description
HW Prefetcher
[Enabled]
Disabled
Use this option to disable the processor HW prefetch
feature. In some cases, setting this option to disabled can
improve performance. Typically, setting this option to
enabled provides better performance. Only disable this
option after performing application benchmarking to verify
improved performance in the environment.
Adjacent Sector Prefetch
[Enabled]
Disabled
Use this option to disable the processor Adjacent Sector
Prefetch feature. In some cases, setting this option to
disabled can improve performance. Typically, setting this
option to enabled provides better performance. Only
disable this option after performing application
benchmarking to verify improved performance in the
environment.
DCU Stream Prefetcher
[Enabled]
Disabled
Use this option to disable the processor DCU Stream
Prefetcher feature. In some cases, setting this option to
disabled can improve performance. Typically, setting this
option to enabled provides better performance. Only
disable this option after performing application
benchmarking to verify improved performance in your
environment.
DCU IP Prefetcher
[Enabled]
Disabled
Use this option to disable the processor DCU IP
Prefetcher feature. In some cases, setting this option to
disabled can improve performance. In most cases, the
default value of enabled provides optimal performance.
Only disable this option after performing application
benchmarking to verify improved performance in the
environment.
LLC Prefetch
Enabled
[Disabled]
Use this option to configure the processor Last Level
Cache (LLC) prefetch feature. In some cases, setting this
option to disabled can improve performance. Typically,
setting this option to enabled provides better
performance. Only disable this option after performing
application benchmarking to verify improved performance
in the environment.
XPT Prefetcher
(*3)
[Auto]
(*2)
Enabled
Disabled
"Enabled" setting of this option is not supported.
Use this option with "Auto" or "Disabled" setting.
[ ]: Default setting
*2: this parameter has been added after System ROM Version 1.20.
*3: the factory out setting of this option was changed after System ROM Version 1.20.