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參數(shù)資料
| 型號： | 25759 |
| 英文描述： | Revision Guide for AMD Athlon 64? and AMD Opteron? Processors |
| 中文描述： | 修訂指南的AMD Athlon 64？和AMD Opteron？處理器 |
| 文件頁數(shù)： | 32/49頁 |
| 文件大小： | 287K |
| 代理商： | 25759 |
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32
Product Errata
25759
Rev. 3.09
September 2003
Revision Guide for AMD Athlon 64 and AMD Opteron Processors
81 Cache Coherency Problem with Hardware Prefetching and
Streaming Stores
Description
If the processor's hardware prefetch mechanism initiates a cache line prefetch at approximately the
same time as a streaming store (MOVNT* or MASKMOV*) is performed to that same address, then a
stale copy of that line may be loaded into the cache.
Potential Effect on System
Cache coherency failure leading to unpredictable system failure. This erratum affects both
uniprocessor and multiprocessor configurations. It has only ever been observed in a randomized
diagnostic environment.
Suggested Workaround
Set DC_CFG.DIS_SMC_CHK_BUF (bit 10 of MSR 0xC001_1022) to disable the SMC check buffer
for streaming stores. No loss of functionality occurs as a result of setting this bit.
Fix Planned
Yes
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