Chapter 4: UEFI BIOS
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Degrade Precedence
Use this feature to set degrade precedence when system settings are in conflict. Select
Topology Precedence to degrade Features. Select Feature Precedence to degrade Topol-
ogy. The options are
Topology Precedence
and Feature Precedence.
Link L0p Enable
Select Enable for Link L0p support. The options are Disable, Enable, and
Auto
.
Link L1 Enable
Select Enable for Link L1 support. The options are Disable, Enable, and
Auto
.
IO Directory Cache (IODC)
IO Directory Cache is an 8-entry cache that stores the directory state of remote IIO writes
and memory lookups, and saves directory updates. Use this feature to lower cache to
cache (C2C) transfer latencies. The options are Disable,
Auto
, Enable for Remote InvItoM
Hybrid Push, InvItoM AllocFlow, Enable for Remote InvItoM Hybrid AllocNonAlloc, and
Enable for Remote InvItoM and Remote WViLF.
SNC
Select Enable to use the feature of Sub NUMA Clustering (SNC), which supports full
SNC (2-cluster) interleave and 1-way IMC interleave. Select Auto for 1-cluster or 2-cluster
support depending on the status of IMC (Integrated Memory Controller) Interleaving. The
options are
Disable
, Enable, and Auto.
XPT Prefetch
Select Enable for Extended (Xtended) Prediction Table (XPT) Prefetch support which
will allow a read request to be sent to the memory controller requesting the prefetch
in parallel to an LLC (Last Level Cache) look-up. The options are
Disable
and Enable.
KTI Prefetch
KTI Prefetch is a feature that 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
Use this feature to configure the threshold settings for local and remote systems that
are connected in the network. The options are Disable,
Auto
, Low, Medium, and High.
Stale AtoS
Select Enable to remove the contents and the structures of the files that are no longer
needed in the remote host server but are still in use by the local client machine from
Directory A to Directory S in the NFS (Network File System) to optimize system perfor-
mance. The options are
Disable
, Enable, and Auto.
LLC Dead Line Alloc
Select Enable to opportunistically fill the deadlines in LLC (Last Level Cache). The op
-
tions are Disable,
Enable
, and Auto.
