AMD Phenom 8650 Triple-Core HD8650WCGHBOX User Manual
Product codes
HD8650WCGHBOX
18
Product Errata
41322
Rev. 3.16 February 2008
Revision Guide for AMD Family 10h Processors
57
Some Data Cache Tag Eviction Errors Are Reported As Snoop
Errors
Errors
Description
In some cases, the machine check error code on a data cache (DC) tag array parity error erroneously
classifies an eviction error as a snoop error.
classifies an eviction error as a snoop error.
The common cases of cache line replacements and external probes are classified correctly (as eviction
and snoop respectively). The erroneous cases occur when a tag error is detected during a DC eviction
that was generated by a hardware prefetch, a cache line state change operation, or a number of other
internal microarchitectural events. In such cases, the error code logged in the DC Machine Check
Status register (MC0_STATUS, MSR 0x401) erroneously indicates a snoop error.
and snoop respectively). The erroneous cases occur when a tag error is detected during a DC eviction
that was generated by a hardware prefetch, a cache line state change operation, or a number of other
internal microarchitectural events. In such cases, the error code logged in the DC Machine Check
Status register (MC0_STATUS, MSR 0x401) erroneously indicates a snoop error.
Potential Effect on System
Internally detected DC tag errors may be reported to software as having been detected by snoops.
Depending upon machine check software architecture, the system response to such errors may be
broader than necessary.
Depending upon machine check software architecture, the system response to such errors may be
broader than necessary.
Suggested Workaround
None required.
Fix Planned
No