Date: Fri, 23 Feb 2007 20:45:15 +0530
From: Suparna Bhattacharya <suparna@in.ibm.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Jens Axboe <jens.axboe@oracle.com>, linux-kernel@vger.kernel.org,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Arjan van de Ven <arjan@infradead.org>,
       Christoph Hellwig <hch@infradead.org>, Andrew Morton <akpm@zip.com.au>,
       Alan Cox <alan@lxorguk.ukuu.org.uk>,
       Ulrich Drepper <drepper@redhat.com>, Zach Brown <zach.brown@oracle.com>,
       Evgeniy Polyakov <johnpol@2ka.mipt.ru>,
       "David S. Miller" <davem@davemloft.net>,
       Davide Libenzi <davidel@xmailserver.org>,
       Thomas Gleixner <tglx@linutronix.de>
Subject: Re: A quick fio test (was Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3)
Message-ID: <20070223151515.GA12960@in.ibm.com>
Reply-To: suparna@in.ibm.com
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On Fri, Feb 23, 2007 at 03:58:26PM +0100, Ingo Molnar wrote:
> 
> * Suparna Bhattacharya <suparna@in.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@in.ibm.com)
Linux Technology Center
IBM Software Lab, India

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