Chapter 6: BIOS
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UPI Configuration
The following UPI information displays:
•
Number of CPU
•
Number of IIO
•
Current UPI Link Speed
•
Current UPI Link Frequency
•
UPI Global MMIO Low Base / Limit
•
UPI Global MMIO High Base / Limit
•
UPI Pci-e Configuration Base / Size
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 the QPI to enter the L0p state for power saving. The options are Dis-
able, Enable, and
Auto
.
Link L1 Enable
Select Enable for the QPI to enter the L1 state for power saving. The options are Dis-
able, 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.
Isoc Mode
Isochronous (Isoc) mode allows time-sensitive processes to be given priority. The options
are Disable, Enable, and
Auto
.
