From: Vivek Goyal <vgoyal@redhat.com>
To: Joe Landman <landman@scalableinformatics.com>
Cc: fio@vger.kernel.org
Subject: Re: An issue with fio performance on an SSD
Date: Mon, 19 Jul 2010 13:40:49 -0400 [thread overview]
Message-ID: <20100719174049.GA32503@redhat.com> (raw)
In-Reply-To: <4C448A72.4070601@scalableinformatics.com>
On Mon, Jul 19, 2010 at 01:25:06PM -0400, Joe Landman wrote:
> Joe Landman wrote:
> >Greetings
> >
> > We are playing with some SSDs, and as usual, we want to use fio
> >for our testing regime. So we set up a simple streaming write:
>
> Ok, I figured it out.
>
> Add zero_buffers=1 to the job specification. Then we get this:
>
> Run status group 0 (all jobs):
> WRITE: io=32,706MB, aggrb=535MB/s, minb=548MB/s, maxb=548MB/s,
> mint=61133msec, maxt=61133msec
Interesting. Why not initializing bufferes with zero leads to poor
performance?
Vivek
>
>
>
> --
> Joseph Landman, Ph.D
> Founder and CEO
> Scalable Informatics Inc.
> email: landman@scalableinformatics.com
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next prev parent reply other threads:[~2010-07-19 17:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-19 14:58 An issue with fio performance on an SSD Joe Landman
2010-07-19 17:25 ` Joe Landman
2010-07-19 17:40 ` Vivek Goyal [this message]
2010-07-19 17:44 ` Joe Landman
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