linux-ext4 - Re: [PATCH 0/2] ext3: Reduce calling ext3_mark_inode

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Date:	Mon, 06 Feb 2012 13:13:17 +0900
From:	Kazuya Mio <k-mio@...jp.nec.com>
To:	Yongqiang Yang <xiaoqiangnk@...il.com>
CC:	Andreas Dilger <adilger@...ger.ca>,
	ext4 <linux-ext4@...r.kernel.org>, Jan Kara <jack@...e.cz>
Subject: Re: [PATCH 0/2] ext3: Reduce calling ext3_mark_inode_dirty() for
 speedup

2012/02/03 22:28, Yongqiang Yang wrote:
> On Fri, Feb 3, 2012 at 3:49 PM, Kazuya Mio<k-mio@...jp.nec.com>  wrote:
>> 2012/02/03 7:36, Andreas Dilger wrote:
>>>>
>>>>   filesystem        time(sec)  call extX_mark_inode_dirty(times)
>>>>   ---
>>>>   ext3              220.5      50,338,104
>>>>   ext3 (patched)    196.3      25,169,658
>>>>   ext4 (*1)         190.3      28,465,799
>>>>   ext4 (*2)         201.5      27,963,473
>>>>   ext4 (default)    223.3      14,026,118
>>>>
>>>>   *1 disable ext4-specific options (delalloc, extent, and so on)
>>>>   *2 disable only delalloc option
>>>
>>> This shows that ext4 with extents+delalloc is _slower_ than ext3, which
>>> is very strange.  In other similar tests of write performance (see
>>
>>
>> One more thing is that ext4+delalloc is slower than ext4+nodelalloc.
> And according to the data, maybe ext4+extent is also slower than ext4+noextent.
>
> What's the size of the fs?  and what kind of the tested device?

I tested on Express5800/A1080a-S (4-way server with 8-core processors).
Filesystem size was 100GB. I used the 266GB LUN from the FC-SAN storage.

Regards,
Kazuya Mio
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