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Cache mechanism and method for avoiding cast out on bad victim select and recycling victim select operation
Cache mechanism and method for avoiding cast out on bad victim select and recycling victim select operation
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机译:避免对不良的受害者选择进行抛弃并回收受害者选择操作的缓存机制和方法
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摘要
A method, apparatus, and computer for identifying selection of a bad victim during victim selection at a cache and recovering from such bad victim selection without causing the system to crash or suspend forward progress of the victim selection process. Among the bad victim selection addressed are recovery from selection of a deleted member and recovery from use of LRU state bits that do not map to a member within the congruence class. When LRU victim selection logic generates an output vector identifying a victim, the output vector is checked to ensure that it is a valid vector (non-null) and that it is not pointing to a deleted member. When the output vector is not valid or points to a deleted member, the LRU victim selection logic is triggered to re-start the victim selection process.
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