Message-ID: <49D756B0.6030609@rtr.ca>
Date: Sat, 04 Apr 2009 08:46:40 -0400
From: Mark Lord <lkml@rtr.ca>
Organization: Real-Time Remedies Inc.
User-Agent: Thunderbird 2.0.0.21 (X11/20090318)
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To: Jeff Garzik <jeff@garzik.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
       Chris Mason <chris.mason@oracle.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       Jens Axboe <jens.axboe@oracle.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Linux 2.6.29
References: <1238758370.32764.5.camel@think.oraclecorp.com> <alpine.LFD.2.00.0904030804160.4130@localhost.localdomain> <49D66C0E.5090301@garzik.org> <alpine.LFD.2.00.0904031309500.4015@localhost.localdomain> <49D68431.30703@garzik.org> <alpine.LFD.2.00.0904031452290.7007@localhost.localdomain> <49D6A04B.2080104@garzik.org>
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Jeff Garzik wrote:
> Linus Torvalds wrote:
>> "fio" does well:
>>
>>     http://git.kernel.dk/?p=fio.git;a=summary
> 
> Neat tool, Jens...
> 
> 
>> and I think it comes with a few example files. Here's the random write 
>> file that Jens suggested, and that works pretty well..
>>
>> It first creates a 2GB file to do the IO on, then does random 4k 
>> writes to it with O_DIRECT.
>>
>> If your SSD does badly at it, you'll just want to kill it, but it 
>> shows you how many MB/s it's doing (or, in the sucky case, how many 
>> kB/s).
> 
> 
> heh, so far, the SSD is poking along...
> 
> Jobs: 1 (f=1): [w] [2.5% done] [     0/   282 kb/s] [eta 02h:24m:59s]
..

Try turning on the drive write cache?   hdparm -W1

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