linux-kernel - Re: Linux 2.6.29

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Date:	Sat, 04 Apr 2009 08:46:40 -0400
From:	Mark Lord <lkml@....ca>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Chris Mason <chris.mason@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.29

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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