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From: Wu Fengguang <fengguang.wu@intel.com>
To: Fernando Silveira <fsilveira@gmail.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: I/O and pdflush
Date: Mon, 31 Aug 2009 22:07:13 +0800	[thread overview]
Message-ID: <20090831140713.GA24185@localhost> (raw)
In-Reply-To: <20090831140113.GA24005@localhost>

On Mon, Aug 31, 2009 at 10:01:13PM +0800, Wu Fengguang wrote:
> On Mon, Aug 31, 2009 at 10:00:06PM +0800, Wu Fengguang wrote:
> > Hi Fernando,
> > 
> > What's your SSD's IO parameters? Ie. output of this command:
> > 
> >         grep -r . /sys/block/sda/queue/        
> > 
> > Please replace 'sda' with your SSD device name.
> 
> Oh I guess it's sdc:
> 
>          grep -r . /sys/block/sdc/queue/        

BTW, would you run "iostat -x 1 5" (which will run 5 seconds) when
doing I/O in ideal throughput, and when in 25MB/s thoughput state?

Thanks,
Fengguang

  reply	other threads:[~2009-08-31 14:07 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-11 17:27 I/O and pdflush Fernando Silveira
2009-07-12  8:04 ` Wu Fengguang
2009-08-28 21:48   ` Fernando Silveira
2009-08-29 10:12     ` Wu Fengguang
2009-08-29 10:21       ` Wu Fengguang
2009-08-31 13:24         ` Fernando Silveira
2009-08-31 14:00           ` Wu Fengguang
2009-08-31 14:01             ` Wu Fengguang
2009-08-31 14:07               ` Wu Fengguang [this message]
2009-08-31 14:33                 ` Fernando Silveira
2009-09-01  8:14                   ` Wu Fengguang
     [not found]                     ` <6afc6d4a0909010710l2cf77fbbmb1ab192ed12a7efc@mail.gmail.com>
2009-09-02  3:05                       ` Wu Fengguang
     [not found]                         ` <6afc6d4a0909020429l2bfecee9xd00527fcaa323751@mail.gmail.com>
     [not found]                           ` <20090902125057.GA7982@localhost>
     [not found]                             ` <6afc6d4a0909031346qda0b17coe4c60250fcac827f@mail.gmail.com>
2009-09-04  2:21                               ` Wu Fengguang
2009-09-04  2:34                                 ` Wu Fengguang
     [not found] <cWOyL-3Ys-15@gated-at.bofh.it>
2009-08-31 21:57 ` Daniel J Blueman
2009-09-01 14:33   ` Fernando Silveira

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