Reference Guide

BIOS.ProcSettings.L2StreamHwPrefetcher (Read or Write)
Description
When set to Enabled, the processor provides advanced performance tuning by controlling the hardware
prefetcher setting. Use the recommended setting, and this option will allow for optimizing overall
workloads.
Legal Values
● Enabled
● Disabled
Default Value Not Applicable
Write Privilege Server Control
License Required iDRAC Express or iDRAC Enterprise
Dependency Not applicable
BIOS.ProcSettings.LogicalProc (Read or Write)
Description
Each processor core supports up to two logical processors. When set to Enabled, the BIOS reports all
logical processors. When set to Disabled, the BIOS only reports one logical processor per core. Generally,
higher processor count results in increased performance for most multi-threaded workloads and the
recommendation is to keep this enabled. However, there are some floating point/scientific workloads,
including HPC workloads, where disabling this feature may result in higher performance.
Processor must support HyperThreading.
Legal Values
● Enabled
● Disabled
Default Value Not Applicable
Write Privilege Server Control
License Required iDRAC Express or iDRAC Enterprise
Dependency Not applicable
BIOS.ProcSettings.MadtCoreEnumeration (Read or Write)
Description
This field determines how BIOS enumerates processor cores in the ACPI MADT table. When set to Round
Robin, Processor cores are enumerated in a Round Robin order to evenly distribute interrupt controllers
for the OS across all Sockets and Dies. When set to Linear, Processor cores are enumerated across all
Dies within a Socket before enumerating additional Sockets for a linear distribition of interrupt
conotrollers for the OS.
Only visible on systems with AMD processors.
Legal Values
● RoundRobin
● Linear
Default Value Not Applicable
Write Privilege Server Control
License Required iDRAC Express or iDRAC Enterprise
Dependency Not applicable
BIOS Attributes 271