From: Theodore Tso <tytso@mit.edu>
To: Amit Shah <amit.shah@redhat.com>
Cc: Chris Mason <chris.mason@oracle.com>, Jan Kara <jack@suse.cz>,
Linus Torvalds <torvalds@linux-foundation.org>,
Linux Kernel Developers List <linux-kernel@vger.kernel.org>,
Ext4 Developers List <linux-ext4@vger.kernel.org>
Subject: Re: [PATCH] Add ext3 data=guarded mode
Date: Fri, 17 Apr 2009 16:13:42 -0400 [thread overview]
Message-ID: <20090417201342.GF26479@mit.edu> (raw)
In-Reply-To: <20090417180906.GA8363@amit-x200.pnq.redhat.com>
On Fri, Apr 17, 2009 at 11:39:06PM +0530, Amit Shah wrote:
> # 4GiB file, kernel 9f76208c33984ab777eace5d07a4e36e88703e02 + ext3-guarded
>
> filesystem posix-fallocate mmap chunk-4096 chunk-8192
> ext3-guarded 85 97 459 90
> ext3-writeback 86 95 140 94
> ext3-ordered 86 96 277 95
>
> Running the test in single user mode, I get the following results:
>
> # 4GiB file, kernel 9f76208c33984ab777eace5d07a4e36e88703e02 + ext3-guarded
>
> filesystem posix-fallocate mmap chunk-4096 chunk-8192
> ext3-guarded 84 86 163 91
> ext3-writeback 84 88 217 91
> ext3-ordered 84 86 226 91
The difference between guarded and writeback in chunk-4096 looking at
your desktop timings and your single user times is.... surprising.
In particular, the fact that the guarded time is 3 times longer than
ext3-writeback when the desktop is running, and 20% faster in single
user mode. Are these results reproducible? And do you have any
thoughts as to what might be causing them?
- Ted
next prev parent reply other threads:[~2009-04-17 20:14 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-15 17:22 [PATCH RFC] ext3 data=guarded v3 Chris Mason
2009-04-15 17:22 ` Chris Mason
2009-04-15 17:22 ` [PATCH 1/3] Export filemap_write_and_wait_range Chris Mason
2009-04-15 17:22 ` Chris Mason
2009-04-15 17:22 ` [PATCH 2/3] Add block_write_full_page_endio for passing endio handler Chris Mason
2009-04-15 17:22 ` Chris Mason
2009-04-15 17:22 ` [PATCH 3/3] Add ext3 data=guarded mode Chris Mason
2009-04-15 17:22 ` Chris Mason
2009-04-16 19:42 ` [PATCH] " Chris Mason
2009-04-17 11:04 ` Mike Galbraith
2009-04-17 18:09 ` Amit Shah
2009-04-17 20:13 ` Theodore Tso [this message]
2009-04-18 6:03 ` Amit Shah
2009-04-18 7:28 ` Mike Galbraith
2009-04-19 6:24 ` Amit Shah
2009-04-20 9:07 ` Mike Galbraith
2009-04-20 9:26 ` Jan Kara
2009-04-20 12:15 ` Mike Galbraith
2009-04-20 12:15 ` Mike Galbraith
2009-04-20 12:56 ` Amit Shah
2009-04-20 13:06 ` Mike Galbraith
2009-04-18 6:03 ` Amit Shah
2009-04-20 13:44 ` Jan Kara
2009-04-20 14:18 ` Chris Mason
2009-04-20 14:42 ` Jan Kara
2009-04-20 14:58 ` Chris Mason
2009-04-20 15:50 ` Jan Kara
2009-04-15 19:10 ` [PATCH RFC] ext3 data=guarded v3 Eric Sandeen
2009-04-19 23:26 ` Bojan Smojver
2009-04-15 20:35 ` Linus Torvalds
2009-04-15 21:09 ` Theodore Tso
2009-04-16 8:44 ` Jan Kara
2009-04-16 18:09 ` Nick Piggin
2009-04-16 11:39 ` Mike Galbraith
2009-04-16 11:40 ` Mike Galbraith
2009-04-16 14:56 ` Chris Mason
2009-04-16 17:12 ` Chris Mason
2009-04-16 18:25 ` Mike Galbraith
2009-04-16 18:37 ` Linus Torvalds
2009-04-16 19:38 ` Chris Mason
2009-04-16 18:00 ` Mike Galbraith
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