linux-kernel - Re: A quick fio test (was Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3)

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Message-ID: <20070223151515.GA12960@in.ibm.com>
Date:	Fri, 23 Feb 2007 20:45:15 +0530
From:	Suparna Bhattacharya <suparna@...ibm.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Jens Axboe <jens.axboe@...cle.com>, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Christoph Hellwig <hch@...radead.org>,
	Andrew Morton <akpm@....com.au>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ulrich Drepper <drepper@...hat.com>,
	Zach Brown <zach.brown@...cle.com>,
	Evgeniy Polyakov <johnpol@....mipt.ru>,
	"David S. Miller" <davem@...emloft.net>,
	Davide Libenzi <davidel@...ilserver.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: A quick fio test (was Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3)

On Fri, Feb 23, 2007 at 03:58:26PM +0100, Ingo Molnar wrote:
> 
> * Suparna Bhattacharya <suparna@...ibm.com> wrote:
> 
> > As a really crude (and not very realistic) example of the potential 
> > impact of large numbers of outstanding IOs, I tried some quick direct 
> > IO comparisons using fio:
> > 
> > [global]
> > ioengine=syslet-rw
> > buffered=0
> > rw=randread
> > bs=64k
> > size=1024m
> > iodepth=64
> 
> could you please try those iodepth=20000 tests with the latest 
> fio-testing branch of fio as well? Jens wrote a new, smarter syslet 
> plugin for FIO. You'll need the v3 syslet kernel plus:
> 
>  git-clone git://git.kernel.dk/data/git/fio.git
>  cd fio
>  git-checkout syslet-testing
> 
> my expectation is that it should behave better with iodepth=20000 
> (although i havent tried that yet).

I picked up the fio snapshot from 22nd Feb (fio-git-20070222212513.tar.gz)
and used the v3 syslet patches from your web-site.

Do I still need to get something more recent ?

Regards
Suparna


> 
> 	Ingo

-- 
Suparna Bhattacharya (suparna@...ibm.com)
Linux Technology Center
IBM Software Lab, India

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