Chapter 4: UEFI BIOS
67
Cores Enabled
Use this feature to enable or disable CPU cores in the processor specified by the user. The
default setting is
0
.
Monitor/Mwait
Streaming SIMD Extensions 3 (SSE3) includes Monitor and Mwait instructions, which are used
for thread synchronization. The Monitor instruction monitors a region of memory for writes,
and Mwait instructions instruct the CPU to stop until the monitored region begins to write.
Select Enable to enable the Monitor/Mwait instructions. The options are Disable and
Enable
.
Execute Disable Bit (Available if supported by the OS & the CPU)
Select Enabled to enable the Execute-Disable Bit which will allow the processor to designate
areas in the system memory where an application code can execute and where it cannot,
thus preventing a worm or a virus from flooding illegal codes to overwhelm the processor
or damage the system during an attack. The default is
Enable
. (Refer to the Intel
®
and
Microsoft
®
websites for more information.)
Intel Virtualization Technology
Use feature to enable the Vanderpool Technology. This technology allows the system to run
several operating systems simultaneously. The options are Disable and
Enable
.
PPIN Control
Select Unlock/Enable to use the Protected-Processor Inventory Number (PPIN) in the system.
The options are Unlock/Disable and
Unlock/Enable
.
Hardware Prefetcher (Available when supported by the CPU)
If this feature is set to Enabled, the hardware prefetcher will prefetch streams of data and
instructions from the main memory to the L2 cache to improve CPU performance. The options
are
Enable
and Disable.
Adjacent Cache Prefetch (Available when supported by the CPU)
The CPU prefetches the cache line for 64 bytes if this feature is set to Disabled. The CPU
prefetches both cache lines for 128 bytes as comprised if this feature is set to
Enable
.
DCU Streamer Prefetcher (Available when supported by the CPU)
Select Enabled to enable the DCU (Data Cache Unit) Streamer Prefetcher which will stream
and prefetch data and send it to the Level 1 data cache to improve data processing and
system performance. The options are
Enable
and Disable.
DCU IP Prefetcher (Available when supported by the CPU)
Select Enabled for DCU (Data Cache Unit) IP Prefetcher support, which will prefetch IP
addresses to improve network connectivity and system performance. The options are
Enable
and Disable.
