linux-kernel - Re: howto boost write(2) performance?

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Message-Id: <1192110617.3696.2.camel@blackberry>
Date:	Thu, 11 Oct 2007 15:50:17 +0200
From:	Michael Stiller <ms@...ale.net>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: howto boost write(2) performance?

On Tue, 2007-10-09 at 16:56 +0200, Andi Kleen wrote:
> Michael Stiller <ms@...ale.net> writes:
> > 
> > The write(2) performance is not good enough, the writer threads take to
> > much time, and i ask you for ideas, howto to boost the write
> > performance. 
> 
> You could use an O_DIRECT write if the data is suitably aligned
> and your IO sizes are big enough (O_DIRECT is usually a loss
> on small IOs). It will also be synchronous, but if you do it 
> from a separate thread anyways that should be fine.

Thanks to all who answered and especially to Andi. Using O_DIRECT did
the trick.

Cheers,

Michael


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