User's Manual (1.0b)
4-8
X10QBi Platform User’s Manual
DCU (Data Cache Unit) Streamer Prefetcher (Available when supported by
the CPU)
If set to Enable, the DCU Streamer Prefetcher will prefetch data streams from the
cache memory to the DCU (Data Cache Unit) to speed up data accessing and pro-
cessing for CPU performance enhancement. The options are Disable and Enable.
DCU IP Prefetcher
If this feature is set to Enable, the IP prefetcher in the DCU (Data Cache Unit) will
prefetch IP addresses to improve network connectivity and system performance.
The options are Enable and Disable.
DCU Mode
Use this feature to set the data-prefecting mode for the DCU (Data Cache Unit).
The options are 32KB 8Way Without ECC and 16KB 4Way With ECC.
Direct Cache Access (DCA)
Select Enable to use Intel DCA (Direct Cache Access) Technology to improve the
efciency of data transferring and accessing. The options are Enable and Disable.
DCA Prefetch Delay
A DCA Prefetcher is used with a TOE (TCP/IP Ofoad Engine) adapter to prefetch
data in order to shorten execution cycles and maximize data processing efciency.
Prefetching data too frequently can saturate the cache directory and delay neces-
sary cache access. This feature reduces or increases the frequency the system
prefetches data. The options are [8], [16], [32], [40], [48], [56], [64], [72], [80], [88],
[96], [104], [112], [120].
Extended APIC (Advanced Programmable Interrupt Controller)
Based on Intel's Hyper-Threading architecture, each logical processor (thread) is
assigned 256 APIC IDs (APIDs) in 8-bit bandwidth. When this feature is set to En-
able, the APIC ID will be expanded from 8 bits to 16 bits to provide 512 APIDs to
each thread to enhance CPU performance. The options are Disable and Enable.
AES-NI
Select Enable to use the Intel Advanced Encryption Standard (AES) New Instruc-
tions (NI) to ensure data security. The options are Enable and Disable.
Down Stream PECI (Platform Environment Control Interface)
Select Enable to allow the client server to interact with the host server directly to
achieve better host-client communication in the PECI platform, which will result
in power saving and energy use efciency. The options are Disable and Enable.