linux-kernel - Re: syslets v7: back to basics

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Message-ID: <20071210194623.GL22445@kernel.dk>
Date:	Mon, 10 Dec 2007 20:46:23 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Zach Brown <zach.brown@...cle.com>
Cc:	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Ulrich Drepper <drepper@...hat.com>,
	Arjan van de Ven <arjan@...radead.org>,
	Andrew Morton <akpm@....com.au>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Evgeniy Polyakov <johnpol@....mipt.ru>,
	"David S. Miller" <davem@...emloft.net>,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Davide Libenzi <davidel@...ilserver.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Dan Williams <dan.j.williams@...il.com>,
	Jeff Moyer <jmoyer@...hat.com>,
	Simon Holm Thogersen <odie@...aau.dk>,
	suresh.b.siddha@...el.com
Subject: Re: syslets v7: back to basics

On Thu, Dec 06 2007, Zach Brown wrote:
> 
> The following patches are a substantial refactoring of the syslet code.  I'm
> branding them as the v7 release of the syslet infrastructure, though they
> represent a signifiant change in focus.

[snip]

In case anyone is interested in playing with this, I updated the fio
syslet engine to this interface. Not very well tested yet, but it seems
to work.

I have to say that I like the new interface a lot better, it's a lot
simpler to work with. I was able to cut about 33% of the code that
handles queueing IO and retrieving events (maybe even more, summed up
losely). I'm still not a big fan of the indirect stuff, but that's
minor.

You can get fio by doing a

$ git clone git://git.kernel.dk/fio.git

or just grabbing the latest snapshot from

http://brick.kernel.dk/snaps/fio-git-latest.tar.gz

-- 
Jens Axboe

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