July 2004
Intermediate to advanced
1744 pages
35h 3m
English
Content preview from The Unabridged Pentium 4 IA32 Processor GenealogyBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The Performance Monitoring Facility
Performance Monitoring Is Not Architecturally Defined
Whether or not a processor implements a Performance Monitoring facility and, if so, the method of implementation is design-specific. The facility is not part of the IA32 processor architecture spec. The manner in which it has been implemented on the Pentium®, P6 and Pentium® 4 processor families are not compatible with each other.
Author's Note
The author had a considerable amount of trouble achieving a detailed understanding of every aspect of this feature. The Intel® documentation of this feature is somewhat confusing in some areas.
An Overview
The Pentium® and P6 processor families implemented two Performance Counters, permitting the simultaneously measurement ...
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