CLI Guide

Default Value Not Applicable
Write Privilege Server Control
License Required iDRAC Express or iDRAC Enterprise
Dependency Not applicable
BIOS.ProcSettings.L2UpDownPrefetcher (Read or Write)
Description
When set to Enabled, the processor uses memory access to determine whether to fetch next or previous
for all memory accesses for advanced performance tuning by controlling the L2 up/down 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.LmceEn (Read or Write)
Description
Enable or disable the LMCE feature. This is an extension of the MCA Recovery mechanism providing
the capability to deliver Uncorrected Recoverable (UCR) Software Recoverable Action Required (SRAR)
errors to one or more specific logical processor threads receiving previously poisoned or corrupted data.
When enabled, the UCR SRAR Machine Check Exception is delivered only to the affected thread rather
than broadcast to all threads in the system. The feature supports Operating System recovery for cases
of multiple,recoverable faults detected in close proximity which would otherwise result in a fatal machine
check event. The feature is available only on Advanced RAS processors.
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 Attributes 319