Mobile Storage Analyzer

Written by Kisung Lee kisunglee@hanyang.ac.kr (based on e2fsprogs).

Reference LEE Kisung and WON Youjip "Smart layers and dumb result: Io characterization of an android-based smartphone" In EMSOFT 2012: In Proc. of International Conference on Embedded Software (Oct.7-12 2012). Tampere, Finland http://www.esos.hanyang.ac.kr/files/publication/conferences/international/Smart_Layers_and_Dumb_Result.pdf

Kernel part (MOST/kernel)

• Kernel source is based on Linux kernel 2.6.35.7. (Defined by CONFIG_MOST)
• kernel\trace\blktrace.c
• block\blk-core.c

User program (MOST/progs/most/)

Build

• 1. cd build
• 2. ../configure
• 3. ./config.most
• 4. make
• 5. Program(most) is built in build/most/.

Usage

# most [filesystem (EXT4/FAT32)] [partition path] [input file] [output file]
# most EXT4 /dev/block/mmcblk0p1 trace_in.log trace_out.log

Example

1. Run blktrace (for 60 secs)
    # blktrace -d /dev/block/mmcblk0p12 -a complete -a issue -o result -w 60
2. Run android application (for 60 secs)
3. Run blparse
    # blkparse -f "%5T.%9t\t%a\t%d\t%8S\t%4n\t%4p\t%20C\n" -q -i result > result.p
4. Run MOST
    # most EXT4 /dev/block/mmcblk0p12 result.p result.po

2012-08-27, Kisung Lee kisunglee@hanyang.ac.kr