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IA-32 Intel® Architecture Optimization
Pentium Processor Extreme Edition provide four logical processors in a
physical package that has two execution cores. Each core provides two
logical processors sharing an execution core and a cache hierarchy.
The Intel Core Duo processor provides two logical processors in a
physical package. Each logical processor has a separate execution core
(including first-level cache) and a smart second-level cache. The
second-level cache is shared between two logical processors and
optimized to reduce bus traffic when the same copy of cached data is
used by two logical processors. The full capacity of the second-level
cache can be used by one logical processor if the other logical processor
is inactive.
The functional blocks of these processors are shown in Figure 1-7.
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