发明授权
US06295583B1 Method and apparatus for resolving probes in multi-processor systems which do not use external duplicate tags for probe filtering 失效
用于解决不使用外部重复标签进行探测过滤的多处理器系统中的探针的方法和装置

Method and apparatus for resolving probes in multi-processor systems which do not use external duplicate tags for probe filtering
摘要:
A processor of a multiprocessor system is configured to transmit a full probe to a cache associated with the processor to transfer data from the stored data of the cache. The data corresponding to the full probe is transferred during a time period. A first tag-only probe is also transmitted to the cache during the same time period to determine if the data corresponding to the tag-only probe is part of the stored data stored in the cache. A stream of probes accesses the cache in two stages. The cache is composed of a tag structure and a data structure. In the first stage, a probe is designated a tag-only probe and accesses the tag structure, but not the data structure, to determine tag information indicating a hit or a miss. In the second stage, if the probe returns tag information indicating a cache hit the probe is designated to be a full probe and accesses the data structure of the cache. If the probe returns tag information indicating a cache miss the probe does not proceed to the second stage.
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