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2007
Springer

Object-Relative Addressing: Compressed Pointers in 64-Bit Java Virtual Machines

12 years 6 months ago
Object-Relative Addressing: Compressed Pointers in 64-Bit Java Virtual Machines
64-bit address spaces come at the price of pointers requiring twice as much memory as 32-bit address spaces, resulting in increased memory usage. Increased memory usage is especially of concern on machines that are heavily loaded with memory-intensive applications; overall system performance can quickly deteriorate once physical memory is exhausted. This paper reduces the memory usage of 64-bit pointers in the context of Java virtual machines through pointer compression, called Object-Relative Addressing (ORA). The idea is to compress 64-bit raw pointers into 32-bit offsets relative to the referencing object’s virtual address. Unlike previous work on the subject using a constant base address for compressed pointers, ORA allows for applying pointer compression to Java programs that allocate more than 4GB of memory. Our experimental results using Jikes RVM and the SPECjbb and DaCapo benchmarks on an IBM POWER4 machine show that the overhead introduced by ORA is statistically insigniï¬...
Kris Venstermans, Lieven Eeckhout, Koen De Bossche
Added 07 Jun 2010
Updated 07 Jun 2010
Type Conference
Year 2007
Where ECOOP
Authors Kris Venstermans, Lieven Eeckhout, Koen De Bosschere
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