From: "Chen, Kenneth W" <kenneth.w.chen@intel.com>
To: "'Miquel van Smoorenburg'" <miquels@cistron.nl>,
<linux-kernel@vger.kernel.org>
Subject: RE: cfq performance gap
Date: Wed, 13 Dec 2006 08:20:52 -0800 [thread overview]
Message-ID: <000001c71ed2$a90019b0$2e81030a@amr.corp.intel.com> (raw)
In-Reply-To: <457fce6a$0$334$e4fe514c@news.xs4all.nl>
Miquel van Smoorenburg wrote on Wednesday, December 13, 2006 1:57 AM
> Chen, Kenneth W <kenneth.w.chen@intel.com> wrote:
> >This rawio test plows through sequential I/O and modulo each small record
> >over number of threads. So each thread appears to be non-contiguous within
> >its own process context, overall request hitting the device are sequential.
> >I can't see how any application does that kind of I/O pattern.
>
> A NNTP server that has many incoming connections, handled by
> multiple threads, that stores the data in cylic buffers ?
Then whichever the thread that dumps the buffer content to the storage
will do one large contiguous I/O.
next prev parent reply other threads:[~2006-12-13 16:20 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-08 0:03 Avantika Mathur
2006-12-08 12:05 ` Jens Axboe
2006-12-08 22:09 ` Avantika Mathur
2006-12-11 14:08 ` Jens Axboe
2006-12-13 1:32 ` AVANTIKA R. MATHUR
2006-12-13 5:23 ` Chen, Kenneth W
2006-12-13 9:56 ` Miquel van Smoorenburg
2006-12-13 16:20 ` Chen, Kenneth W [this message]
2006-12-13 16:41 ` Miquel van Smoorenburg
2006-12-13 6:52 ` Jens Axboe
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