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Published in:
2012 | OriginalPaper | Chapter
Prefetching Strategy for Address Translation in IA-32 Emulation
Authors : Liehui Jiang, Haifeng Chen, Jianping Lu, Yuchun Zhao
Published in: Practical Applications of Intelligent Systems
Publisher: Springer Berlin Heidelberg
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IA-32 emulation is a good solution to software compatibility for new computer architecture. However, the address translation from guest machine to host machine is one of the most costly process in IA-32 emulation. To reduce the translation overhead, this paper presented a Pre_TLB with a prefetching window which could predict the memory access of guest machine. The prefetching window slides with the current address which causes a Pre_TLB miss. All entries in the prefetching window are translated at the same time so that several times of memory access can be reduced. Experiments showed that Pre_TLB had a good performance both on hit rate and time cost. For the program with conspicuous locality property, Pre_TLB could only obtain an improvement of 2%. However, for the program with little locality property, the hit rate improved by 9%, and the time cost reduced by 20%.