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Date: Tue, 03 Apr 2007 15:19:33 -0400
From: Phillip Susi <psusi@cfl.rr.com>
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To: Ameya Mitragotri <ameya.mitragotri@gmail.com>
CC: linux-kernel@vger.kernel.org, suparna@in.ibm.com, pbadari@gmail.com
Subject: Re: fadvise+sync_file_range Vs O_DIRECT
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Ameya Mitragotri wrote:
> Hello,
> I am doing some benchmarking on writes to the hdd from a simple
> application (attached).
> Im benchmarking the writes using the following
> - write with O_DIRECT
> - write with fadvise + O_SYNC
> - write with fadvise + sync_file_range

Did you use overlapped aio with O_DIRECT or just send down one request 
at a time?