Technical Product Specification

Intel® Server Boards S4600LH2/T2 TPS
Revision 2.0
136
Option Values: Enabled
Disabled
Help Text:
[Enabled] – Fetches adjacent cache line (128 bytes) when required data is not currently in
cache.
[Disabled] – Only fetches cache line with data required by the processor (64 bytes).
Comments: MLC Spatial Prefetcher is normally Enabled, for best efficiency in L2 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
]
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
]
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
]
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
]