Intel S2600CP - Page 108

Hardware Installations and Upgrades
94 Intel
®
Server Board S2600CP Intel
®
Server System P4000CP Family Service Guide
30. DCU Data Prefetcher
Option Values: Enabled
Disabled
Help Text:
The next cache line will be prefetched into L1 data cache from L2 or system memory
during unused cycles if it sees that the processor core has accessed several bytes
sequentially in a cache line as data.
[Disabled] – Only fetches cache line with data required by the processor (64 bytes).
Comments: DCU Data Prefetcher is normally Enabled, for best efficiency in L1
Data Cache and Memory Channel use, but disabling it may improve performance for some
processing loads and on certain benchmarks.
Back to Processor Configuration Screen] — [Advanced Screen]
31. DCU Instruction Prefetcher
Option Values: Enabled
Disabled
Help Text:
The next cache line will be prefetched into L1 instruction cache from L2 or system
memory during unused cycles if it sees that the processor core has accessed several bytes
sequentially in a cache line as data.
Comments: DCU Data Prefetcher is normally Enabled, for best efficiency in L1 I
Cache and Memory Channel use, but disabling it may improve performance for some processing
loads and on certain benchmarks.
Back to [Processor Configuration Screen] — [Advanced Screen]
32. Direct Cache Access (DCA)
Option Values: Enabled
Disabled
Help Text:
Allows processors to increase the I/O performance by placing data from I/O devices
directly into the processor cache.
Comments: System performance is usually best with Direct Cache Access Enabled.
In certain unusual cases, disabling this may give improved results.
Back to [Processor Configuration Screen] — [Advanced Screen]