A Space-Aware AMD64 Port of Jikes RVM
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چکیده
As computers attempt to work with larger and more complex datasets, the need for 64-bit computing is becoming more acute. Many applications, such as video editing and large scale databases, are reaching the limits of addressable memory in 32-bit computers. These new 64-bit architectures are dependent on compilers to produce equivalent or better code. Here we look at the issues in porting the Jikes RVM to the AMD64 architecture, the apparent 64-bit successor to the 32-bit x86 architecture. We explore various design decisions made in porting to AMD64 and provide recommendations for those who wish to port Jikes RVM to subsequent architectures. One of the primary challenges in increasing processor word size is the corresponding increase in code size and memory usage due to the larger pointers and data. Techniques to save memory space in the JVM are hampered by the JVM spec, which favors 32-bit implementations. By bending the JVM spec, we have implemented a memory saving optimization to the AMD64 port Jikes RVM. We have also reduced memory space by using equivalent 32-bit instructions when possible. These two memory optimizations have saved as much as 7% on the SpecJvm98 and Java Grande benchmarks.
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تاریخ انتشار 2005