TY - CHAP U1 - Konferenzveröffentlichung A1 - Goffart, Markus A1 - Dueck, Gerhard W. A1 - Herpers, Rainer T1 - A Comparison of Fixed and Variable Block Allocation in two Java Virtual Machines T2 - Proceedings of the International Conference on Software Technology and Engineering (ICSTE 2012) N2 - This paper compares the memory allocation of two Java virtual machines, namely Oracle Java HotSpot VM 32-bit (OJVM) and Jamaica JamaicaVM (JJVM). The basic difference of the architectures in both machines is that the JamaicaVM uses fixed-size blocks for allocating objects on the heap. The basic difference of the architectures is that the JJVM uses fixed size block allocation on the heap. This means that objects have to be split into several connected blocks if they are bigger than the specified block-size. On the other hand, for small objects a full block must be allocated. The paper contains both theoretical and experimental analysis on the memory-overhead. The theoretical analysis is based on specifications of the two virtual machines. The experimental analysis is done with a modified JVMTI Agent together with the SPECjvm2008 Benchmark. Y1 - 2012 SN - 978-0-7918-6015-1 SB - 978-0-7918-6015-1 U6 - https://doi.org/10.1115/1.860151_ch76 DO - https://doi.org/10.1115/1.860151_ch76 SP - 479 EP - 488 S1 - 10 PB - ASME ER -