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EUROSYS
2007
ACM

Removing the memory limitations of sensor networks with flash-based virtual memory

9 years 7 months ago
Removing the memory limitations of sensor networks with flash-based virtual memory
Virtual memory has been successfully used in different domains to extend the amount of memory available to applications. We have adapted this mechanism to sensor networks, where, traditionally, RAM is a severely constrained resource. In this paper we show that the overhead of virtual memory can be significantly reduced with compile-time optimizations to make it usable in practice, even with the resource limitations present in sensor networks. Our approach, ViMem, creates an efficient memory layout based on variable access traces obtained from simulation tools. This layout is optimized to the memory access patterns of the application and to the specific properties of the sensor network hardware. Our implementation is based on TinyOS. It includes a pre-compiler for nesC code that translates virtual memory accesses into calls of ViMem’s runtime component. ViMem uses flash memory as secondary storage. In order to evaluate our system we have modified nontrivial existing applications...
Andreas Lachenmann, Pedro José Marró
Added 10 Mar 2010
Updated 10 Mar 2010
Type Conference
Year 2007
Where EUROSYS
Authors Andreas Lachenmann, Pedro José Marrón, Matthias Gauger, Daniel Minder, Olga Saukh, Kurt Rothermel
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