From: "Sébastien Dugué" <sebastien.dugue@bull.net>
To: vikas gupta <vikas_gupta51013@yahoo.co.in>
Cc: linux-aio@kvack.org, linux-kernel@vger.kernel.org, bcrl@kvack.org
Subject: Re: AIO Support and related package information??
Date: Mon, 26 Sep 2005 15:45:12 +0200 [thread overview]
Message-ID: <1127742313.2103.27.camel@frecb000686> (raw)
In-Reply-To: <20050926091302.10847.qmail@web8403.mail.in.yahoo.com>
On Mon, 2005-09-26 at 10:13 +0100, vikas gupta wrote:
> hi sebastien,
>
> >
> >> Have a look at:
> >>
> http://www.bullopensource.org/posix/Bench/sysbench->oltp/sysbench.html
> >> for benchmarks using Sysbench and MySQL.
>
> I think this link is broken as it is not working ...
> Can you please check it ....
It's working but your mail client may have broken down the url.
Start at http://www.bullopensource.org/posix/ and follow the
Sysbench - oltp link under Benchmark results.
>
> >> > 2.1) aio_read/aio_write is supported but what
> >> > limitation are there
> >>
> >> Supported but without notification (SIGEV_NONE
> >> only).
>
> Can you please tell whether kernel behaves
> asynchronously for read operation without O_DIRECT
> MACRO's ???
Without any of the patches you need to use O_DIRECT
and aligned buffers, size and offset.
Buffered AIO is implemented by Suparna's patches.
>
> > > 4) Is there any test program that can measure
> > > efficiency for both glibc and libposix
> > implementation
> >
> > I personally use Sysbench and have compiled 3
> > MySQL servers,
> > one with librt AIO, one with libposix-aio and one
> > with MySQL
> > native simulated AIO.
> >
> > You may also try iozone.
>
> Can you please tell which one is better among three
> that you have tested
It depends on what you want to benchmark. Typically, Sysbench
in oltp mode mimics database use.
>
> 4) Is there any simple procedure to test the above
> mentioned library packages ???
For POSIX conformance, have a look at the Open POSIX
Test Suite at http://posixtest.sourceforge.net/
Sébastien.
--
------------------------------------------------------
Sébastien Dugué BULL/FREC:B1-247
phone: (+33) 476 29 77 70 Bullcom: 229-7770
mailto:sebastien.dugue@bull.net
Linux POSIX AIO: http://www.bullopensource.org/posix
------------------------------------------------------
next prev parent reply other threads:[~2005-09-26 13:45 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-22 3:08 AIO Support and related package information?? vikas gupta
2005-09-22 7:46 ` Sébastien Dugué
2005-09-23 3:10 ` vikas gupta
2005-09-23 7:05 ` Sébastien Dugué
2005-09-26 7:32 ` vikas gupta
2005-09-26 8:59 ` Sébastien Dugué
2005-09-26 9:13 ` vikas gupta
2005-09-26 13:45 ` Sébastien Dugué [this message]
2005-09-26 14:06 ` vikas gupta
2005-09-26 14:34 ` Sébastien Dugué
2005-09-27 7:09 ` vikas gupta
2005-09-28 7:25 ` Sébastien Dugué
2005-09-28 12:57 ` vikas gupta
2005-09-28 12:58 ` vikas gupta
2005-09-28 13:35 ` Sébastien Dugué
2005-09-28 14:04 ` vikas gupta
2005-09-29 9:31 ` Sébastien Dugué
2005-09-30 3:07 ` vikas gupta
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