String matching method and device based on definite state automaton
A string matching and finite state technology, applied in the field of retrieval, can solve problems such as time extension and slow character matching
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[0050]Since most of the current mainstream processors have L1 cache and L2 cache, a few high-end processors also integrate L3 cache. Among them, the first-level cache is a high-speed cache enclosed in the CPU chip, and its access speed is consistent with the main frequency of the CPU. The first-level cache can temporarily store various types of operation instructions and data required for operation that will be used when the CPU performs operations, so as to deliver them to the CPU. That is, the first-level cache includes a first-level instruction cache and a first-level data cache.
[0051] The second-level cache is the buffer of the first-level cache. Outside the CPU, its function is to store data that needs to be used by the CPU for processing but cannot be stored in the first-level cache. In the same way, the L3 cache and memory can be regarded as the buffer of the L2 cache. L2 cache, L3 cache, and memory cannot store CPU operation instructions.
[0052] The latency ove...
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