Intel S2600CP Service Manual page 108

Hardware Installations and Upgrades
30. DCU Data Prefetcher
Option Values:
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:
Data Cache and Memory Channel use, but disabling it may improve performance for some
processing loads and on certain benchmarks.
Back to Processor Configuration
31. DCU Instruction Prefetcher
Option Values:
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:
Cache and Memory Channel use, but disabling it may improve performance for some processing
loads and on certain benchmarks.
Back to [Processor Configuration
32. Direct Cache Access (DCA)
Option Values:
Help Text:
Allows processors to increase the I/O performance by placing data from I/O devices
directly into the processor cache.
Comments:
In certain unusual cases, disabling this may give improved results.
Back to [Processor Configuration
94
Enabled
Disabled
DCU Data Prefetcher is normally Enabled, for best efficiency in L1
Screen] —
Enabled
Disabled
DCU Data Prefetcher is normally Enabled, for best efficiency in L1 I
Screen] —
Enabled
Disabled
System performance is usually best with Direct Cache Access Enabled.
Screen] —
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Intel Server Board S2600CP Intel
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Server System P4000CP Family Service Guide