Aperf May Increase Unpredictably - AMD 3200 - Athlon 64 2.0 GHz Processor Manual

Revision Guide for AMD Family

APERF May Increase Unpredictably

Description
The value of MSR
A P-state transition including those performed due to core performance boost CPB
A C-state transition
A change in the P-state limit due to hardware thermal control HTC application power management APM
or advanced platform management link APML TDP limiting
Execution of the MWAIT instruction
Potential Effect on System
Software may calculate the effective frequency of a core incorrectly or observe that the APERF register value
appears to increase unpredictably
Suggested Workaround
Contact your AMD representative for information on a BIOS update
Fix Planned
Yes
h Models h- Fh Processors
E APERF may increase unpredictably after any of the following events
Product Errata
Rev October