ubifs, ubiblk(formatted with vfat) and yaffs2 test.

[Artem Bityutskiy]

On Fri, 2008-05-30 at 15:01 +0900, KeunO Park wrote:
> [write test]
> 
> yaffs2
> write: 10.20s, 12.09s, 12.24s avg:11.51s (868KB/s)
> load avg right after copy&sync: 0.03 -> 0.11
> 
> ubifs (LZO)
> write: 14.45s, 14.40s, 14.45s avg:14.43s (693KB/s)
> load avg right after copy&sync: 0.03 -> 0.53
> 
> ubifs (ZLIB)
> write : 27.17s, 27.18s, 27.21s avg:27.18 (367KB/s)
> load avg right after copy&sync: 0.03 -> 0.80
> 
> ubifs (No Compression)
> write: 6.69s, 10.90s, 10.98s avg:9.52s (1050KB/s)
> load avg right after copy&sync: 0.03 -> 0.43
> 
> ubiblk(vfat mount)
> read: 0.46s, 0.47s, 0.46s avg: 0.463s (21.5MB/s)
> write: 12.13s, 14.95s, 12.61s avg:13.23s (755KB/s)
> load avg right after copy&sync: 0.02 -> 0.31
> 
> With above result, it seems that there is some overload in ubi.

Hi,

you complained about UBIFS load average. We have added a mount
option which disabled data CRC checking. You may try it to improve
the situation. Just added this piece of documentation:

http://www.linux-mtd.infradead.org/doc/ubifs.html#L_checksumming

-- 
Best regards,
Artem Bityutskiy (Битюцкий Артём)