Specifications

Product Errata 99
Revision Guide for AMD Athlon™ 64 and AMD Opteron™ Processors
25759 Rev. 3.79 July 2009
393 Performance Monitor May Count Fastpath Double Operation
Instructions Incorrectly
Description
The processor does not report the correct count for all fastpath double operation instructions when
Performance Event Select Register (PERF_CTL[3:0]) MSRC001_000[3:0][EventSelect] is 0CCh.
This erratum applies to all unit mask settings for this event.
Potential Effect on System
Performance monitoring software will not have an accurate count of fastpath double operation
instructions.
Suggested Workaround
None.
Fix Planned
No