Chapter 5: UEFI BIOS
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Hybrid Push, InvItoM AllocFlow, Enable for Remote InvItoM Hybrid AllocNonAlloc, and
Enable for Remote InvItoM and Remote WViLF.
SNC
Sub NUMA Clustering (SNC) is a feature that breaks up the Last Level Cache (LLC) into
clusters based on address range. Each cluster is connected to a subset of the memory
controller. Enabling SNC improves average latency and reduces memory access conges-
tion to achieve higher performance. Select Auto for 1-cluster or 2-clusters depending on
IMC interleave. Select Enable for Full SNC (2-clusters and 1-way IMC interleave). The
options are
Disable
, Enable, and Auto.
XPT Prefetch
XPT Prefetch speculatively makes a copy to the memory controller of a reader request
being sent to the LLC. IF the read request maps to the local memory address and the
recent memory reads are likely to miss the LLC, a speculative read is sent to the local
memory controller. The options are
Disable
and Enable.
KTI Prefetch
XPT Prefetch enables memory read to start early on a DDR bus, where the KTI Rx path
will directly create a Memory Speculative Read command to the memory controller. The
options are Disable and
Enable
.
Local/Remote Threshold
This feature allows the user to set the threshold for the Interrupt Request (IRQ) signal,
which handles hardware interruptions. The options are Disable,
Auto
, Low, Medium,
and High.
Stale AtoS
This feature optimizes A to S directory. When all snoop responses found in directory A
are found to be Rspl, then all data is moved to directory S and is returned in S-state.
The options are Disable, Enable, and
Auto
.
LLC Dead Line Alloc
Select Enable to optimally fill dead lines in LLC. Select Disable to never fill dead lines in
LLC. The options are Disable,
Enable
, and Auto.
Isoc Mode
Isochronous (Isoc) mode allows time-sensitive processes to be given priority. The options
are Disable, Enable, and
Auto
.
Memory Configuration
