Mount results

From UBIFSWiki

Contents 1 Raw numbers 2 Relative results (ratio) 3 Command line and settings 3.1 Mount 3.2 Media content

Raw numbers

E1-nand

JFFS2	mount time		peak memory usage
	dirty media	almost full media	almost full media
No Summary	18.50	12.67	1826183
SUM. 2007-09-18	0.90	1.69	1960122
SUM. 2008-05-07	1.15	1.63
UBIFS	mount time		peak memory usage
	dirty media	almost full media	almost full media
2007-09-18	0.47	1.79	1198265
2007-09-30	1.51	0.99	847116
2008-01-07	1.54	1.46
2008-05-07	1.05	1.00

Relative results (ratio)

E1-nand (compare to JFFS2 with summary support)

UBIFS	mount time		peak memory usage
	dirty media	almost full media	almost full media
2007-09-18	0.52	1.06	0.61
2007-09-30	1.67	0.58	0.43
2008-01-07	1.71	0.86
2008-05-07	0.93	0.61

Command line and settings

• The mount time shows how fast the media can be attached to the system. The raw numbers are in seconds.
• The peak memory usage shows how much was the maximum allocated memory during the mount. The raw numbers are in bytes.
• The relative numbers denote magnitude of each FS relative to JFFS2 with summary support.
• In the relative data the
  • green value means UBIFS is faster than the reference (at least 5%)
  • red value means UBIFS is slower than the reference (at least 5%)
  • black value means ratio is in 5% margin of error
• We used the following commands and settings to produce the results.

Mount

• UBIFS

flash_eraseall /dev/mtdX  # Only for clean fs
modprobe ubi mtd=X
ubimkvol -d 0 -n 0 -N ubifs -m # Only when flash_eraseall is executed
modprobe ubifs
mount -t ubifs ubi0:ubifs /mnt/mtdX

• JFFS2

flash_eraseall /dev/mtdX  # Only for clean fs
mount -t jffs2 /dev/mtdblockX /mnt/mtdX

Media content

• Dirty media:

trash . 17 500   # Delivered by UBIFS-userspace testsuit

• Almost full media:

trash . 17 500   # Delivered by UBIFS-userspace testsuit
rm -rf *
tar -xjf /path/to/archives/glibc-2.5.tar.bz2