Cisco Systems 57712, UCSCPCIEBTG manual 237

BIOS Parameters by Server Model

Advanced BIOS Parameters for C420 Servers

Name	Description
Intel VT-d Coherency Support	Whether the processor supports Intel VT-d Coherency. This can
	be one of the following:
	• Disabled—The processor does not support coherency.
	• Enabled—The processor uses VT-d Coherency as
	required.
Intel VT-d ATS Support	Whether the processor supports Intel VT-d Address Translation
	Services (ATS). This can be one of the following:
	• Disabled—The processor does not support ATS.
	• Enabled—The processor uses VT-d ATS as required.
CPU Performance	Sets the CPU performance profile for the server. The
	performance profile consists of the following options:
	• Data Reuse Optimization
	• DCU Streamer Prefetcher
	• DCU IP Prefetcher
	• Hardware Prefetcher
	• Adjacent Cache-Line Prefetch
	This can be one of the following:
	• Enterprise—Only the DCU IP Prefetcher is enabled. The
	rest of the options are disabled.
	• —All options are enabled.
	• HPC—Data Reuse Optimization is disabled and all other
	options are enabled. This setting is also known as high
	performance computing.
	• Custom—All performance profile options can be
	configured from the BIOS setup on the server. In addition,
	the Hardware Prefetcher and Adjacent Cache-Line Prefetch
	options can be configured in the fields below.
Hardware Prefetcher	Whether the processor allows the Intel hardware prefetcher to
	fetch streams of data and instruction from memory into the
	unified second-level cache when necessary. This can be one of
	the following:
	• Disabled—The hardware prefetcher is not used.
	• Enabled—The processor uses the hardware prefetcher
	when cache issues are detected.

Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5

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