Specifications

92 Product Errata
25759 Rev. 3.79 July 2009
Revision Guide for AMD Athlon™ 64 and AMD Opteron™ Processors
161 Performance-Monitoring Counters Do Not Count Code
Address Matches
Description
The performance-monitoring counters do not count code address matches with DR0-3 unless the
corresponding breakpoint is enabled in DR7.
Potential Effect on System
Performance counters can not be used for instruction address matches when the corresponding
breakpoints are not enabled.
Suggested Workaround
None.
Fix Planned
Yes