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Conference Papers Year : 2014

A Tracing Toolset for Embedded Linux Flash File Systems

Pierre Olivier
  • Function : Author
  • PersonId : 940841
Jalil Boukhobza
Eric Senn
Mathieu Soula
  • Function : Author
  • PersonId : 772879
  • IdRef : 083711198
Michelle Legrand
  • Function : Author
Ismat Chaib Draa
  • Function : Author
  • PersonId : 1036703
  • IdRef : 233795499

Abstract

Integration of NAND flash memory in the traditional I/O software stack of Unix-like operating systems (OS) was achieved without modifying most of the OS layers. In fact, one can dissociate two categories of flash memory devices: (1) those which intricacies are abstracted to the OS (e.g. SSDs, USB sticks), and (2) raw flash memory chips driven by a specific Flash File System (FFS) such as JFFS2 and UBIFS. In the latter case, the operating system I/O software stack low level layers (i.e. file system and driver) were upgraded while the higher levels (virtual file system and related buffers) were not. In order to optimize the system behavior in such a case, one must understand the interactions between the different I/O software management layers, and the impact of each layer on a given I/O workload. For this sake, we developed a tracing toolset allowing to understand the impact of each layer on the I/O request flow, for instance: caching, overheads, and fragmentation. The developed framework proved to be precious to apprehend the interactions between OS flash specific layers and traditional layers for a better system performance understanding.
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Dates and versions

hal-01097123 , version 1 (18-12-2014)

Identifiers

  • HAL Id : hal-01097123 , version 1

Cite

Pierre Olivier, Jalil Boukhobza, Eric Senn, Mathieu Soula, Michelle Legrand, et al.. A Tracing Toolset for Embedded Linux Flash File Systems. 8th International Conference on Performance Evaluation Methodologies and Tools, Dec 2014, Bratislava, Slovakia. ⟨hal-01097123⟩
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