| Summary: | 碩士 === 國立清華大學 === 資訊工程學系 === 98 === Recently, DBT has gained much attentions on embedded systems. However, the memory resource in embedded systems is often limited. This leads to the overhead of code re-translation and causes significant performance degradation. To reduce this overhead, Heterogeneous Code Cache (HCC), is proposed to split the code cache among SPM and main memory to avoid re-translation of code fragments. Although HCC is effective in handling applications with large working set, it ignores the execution frequencies of program fragments. Frequently executed program fragments can be stored in main memory and thus causes performance loss. To address this problem, an enhanced Heterogeneous Code Cache management scheme which considers program behaviors is proposed in this thesis. Experimental results show that the proposed management scheme can effectively improve the access ratio of SPM from 49.48% to 95.06%. This leads to 42.68% improvement of performance as compared with the management scheme proposed in the previous work.
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