Sun Oracle Sun Server X4-2 Service Manual page 218

BIOS Advanced Menu Options
TABLE:
Setup Options
PROCESSORS
Hyper-threading
Execute Disable Bit
Hardware Prefetcher
Adjacent Cache Line
Prefetcher
204 Sun Server X4-2 Service Manual • May 2014
Options
Disabled/Enabled
Disabled/Enabled
Disabled/Enabled
Disabled/Enabled
Defaults
Enabled
Enabled
Enabled
Enabled
Description
Enable or disable processor
(CPU) features.
When enabled, two threads are
available per enabled core. When
disabled, only one thread per
enabled core is available.
When enabled, execute disable
bit can prevent certain classes of
malicious buffer overflow attacks
when combined with a
supporting OS (Oracle Solaris,
Oracle VM, Windows Server,
Red Hat Enterprise Linux, SUSE
Linux Enterprise Server, and
VMware ESXi).
Enable the mid-level cache (L2)
streamer prefetcher.
Enable the mid-level cache (L2)
prefetching of adjacent cache
lines.