linux-kernel - Re: Linux 2.6.29

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Message-ID: <49D6A04B.2080104@garzik.org>
Date:	Fri, 03 Apr 2009 19:48:27 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	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

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]


Compared to the same job file, started at the same time, on the Seagate 
500GB SATA:

Jobs: 1 (f=1): [w] [9.9% done] [     0/  1204 kb/s] [eta 26m:28s]

Regards,

	Jeff



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