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Hierarchical value cache
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<p>In lower power systems, Hierarchical Value Cache refers to the hierarchical arrangement of <a href="/facts/Value_cache_encoding/gHAHomgu">Value Caches</a> (VCs) in such a fashion that lower level VCs observe higher hit-rates, but undergo more switching activity on VC hits. </p><p>The organization is similar to <a href="/facts/Memory_hierarchy/ttwjvRyd">Memory Hierarchy</a>, where lower-level caches enjoy higher hit rates, but longer hit <a href="/facts/Latency_(engineering)/6Bjhn30H">latencies</a>. The architecture for Hierarchical Value Cache is mainly organized along two approaches: Hierarchical Unified Value Cache (HUVC) and Hierarchical Combinational Value Cache (HCVC). </p>