NEC Express5800/R120h-2M Maintenance Manual page 101

Chapter 2 Useful Features
(c) Intel UPI Options Menu
When you select System Configuration > BIOS/Platform Configuration (RBSU) > Power and Performance
Options > Intel UPI Options from the System Utilities, the Intel UPI Options menu appears.
For details about the options, see the table below.
Option
Intel UPI Link Enablement
Intel UPI Link Power
Management
Intel UPI Link Frequency
UPI Prefetcher
Parameter
[Auto]
Single Link Operation
[Enable]
Disable
[Auto]
Min UPI Speed
[Enable]
Disable
Express5800/R120h-1M, R120h-2M Maintenance Guide
Description
Use this option to configure the UPI topology to
use fewer links between processors, when
available. Changing from the default can reduce
UPI bandwidth performance in exchange for less
power consumption.
Use this option to place the Quick Path
Interconnect (UPI) links into a low power state
when the links are not being used. This lowers
power usage with minimal effect on performance.
You can only configure this option if two or more
CPUs are present and the Workload Profile is set
to custom.
Use this option to set the UPI Link frequency to a
lower speed. Running at a lower frequency can
reduce power consumption, but can also affect
system performance. You can only configure this
option if two or more CPUs are present and the
Workload Profile is set to custom.
Use this option to disable the processor UPI
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. This
option must be enabled when Sub-NUMA
Clustering (SNC) is enabled.
[ ]: Default setting
1. System Utilities
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