Deployment Guide

System BIOS
28 Setting up BIOS on 15th Generation (15G) Dell EMC PowerEdge Servers | 508
Memory
Encryption
• Disabled
require operating system or hypervisor support. If the
operating system supports SME this field does not need to
be enabled. If the hypervisor supports SEV this field does
not need to be enabled.
Enabling TSME affects system memory performance.
Note: This option is only available on systems with AMD
processors.
UPI Prefetch
• Enabled
• Disabled
UPI Prefetch is a mechanism to get the memory read started
early on DDR bus, the UPI Rx path will spawn a MemSpecRd
to iMC directly.
Note: This option is only available on systems with Intel
processors.
XPT Prefetch
• Enabled
• Disabled
XPT prefetch is a mechanism that enables the MS2IDI to
take a read request that is being sent to the LLC and
speculatively issue a copy of that read to the memory
controller.
Note: This option is only available on systems with Intel
processors.
LLC Prefetch
• Enabled
• Disabled
Enable/Disable LLC Prefetch on all threads.
Note: This option is only available on systems with Intel
processors.
Dead Line
LLC Alloc
• Enabled
• Disabled
Enabled - opportunistically fill dead lines in LLC. Disabled -
never fill dead lines in LLC.
Note: This option is only available on systems with Intel
processors.
Directory
AtoS
• Enabled
• Disabled
AtoS optimization reduces remote read latencies for repeat
read accesses without intervening writes.
Note: This option is only available on systems with Intel
processors.
Logical
Processor
Idling
• Enabled
• Disabled
Allows you to enable or disable the OS capability to put
logical processors in the idling state in order to reduce
power consumptions. This option is related to Power
Capping and must only be enabled if the OS supports it. It
uses the OS core parking algorithm and parks some of the
logical processors in the system which in turn lets the
corresponding processor cores transition into a lower
power idle state.
Note: This option is only available on systems with Intel
processors.