Flashmon V2: monitoring raw NAND flash memory I/O requests on embedded Linux

Authors:
Pierre Olivier;Jalil Boukhobza;Eric Senn
Affiliations:
Univ. Bretagne Occidentale, Brest, France;Univ. Bretagne Occidentale, Brest, France;Univ. Bretagne Occidentale, Brest, France
Venue:
ACM SIGBED Review - Special Issue on the 3rd Embedded Operating System Workshop (EWiLi 2013)
Year:
2014

Citing 3
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Abstract

This paper presents Flashmon version 2, a tool for monitoring embedded Linux NAND flash memory I/O requests. It is designed for embedded boards based devices containing raw flash chips. Flashmon is a kernel module and stands for "flash monitor". It traces flash I/O by placing kernel probes at the NAND driver level. It allows tracing at runtime the 3 main flash operations: page reads/writes and block erasures. Flashmon is (1) generic as it was successfully tested on the three most widely used flash file systems that are JFFS2, UBIFS and YAFFS, and several NAND chip models. Moreover, it is (2) non intrusive, (3) has a controllable memory footprint, and (4) exhibits a low overhead (