Deployment Guide

System BIOS
12 Setting up BIOS on 15th Generation (15G) Dell EMC PowerEdge Servers | 508
Operating Systems that are NUMA-aware understand the
distribution of memory in a particular system and can
intelligently allocate memory in an optimal manner.
Operating Systems that are not NUMA aware could
allocate memory to a processor that is not local resulting
in a loss of performance. Die and Socket Interleaving
should only be enabled for Operating Systems that are
not NUMA aware.
Note: This option is only available on systems with AMD
processors.
Node Interleaving
• Enabled
• Disabled
If enabled, memory interleaving is supported if a
symmetric memory configuration is installed. If disabled,
the system supports Non-Uniform Memory Access
(NUMA) (asymmetric) memory configurations.
OSs that detect NUMA detect the distribution of memory
in a particular system and can intelligently allocate
memory in an optimal manner. OSs that detect NUMA
could allocate memory to a processor that is not local,
resulting in a loss of performance. Node Interleaving
should only be enabled for OSs that are not NUMA aware.
ADDDC Setting
• Enabled
• Disabled
When Adaptive Double DRAM Device Correction
(ADDDC) is enabled, failing DRAMs are dynamically
mapped out. This action can have some impact on system
performance under certain workloads. This feature only
applies to x4 DIMMs, and when Fault Resilient Mode
(FRM) is disabled.
Note: This option is only available on systems with Intel
processors.
Memory Map Out
N/A
This field controls DIMMs slots on the system.
Memory Training
• Fast
• Retrain at
Next Boot
• Enable
Fast - Use previously saved memory training parameters
to train the memory subsystem when memory
configuration is not changed. System boot time is reduced
when memory configurations is not changed. If memory
configuration is changed, system automatically enables
"Retrain at Next Boot" to force one-time full memory
training steps, and then go back to "Fast" afterward.
Retrain at Next Boot - Force one-time full memory
training steps at next system power on. System boot time
is slowed on next boot.
Enable - Force full memory training steps on every
system power on. System boot time is slowed on every
boot.
Note: This option is only available on systems with Intel
processors.