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List:       linux-aio
Subject:    Re: aio patchset updates
From:       Suparna Bhattacharya <suparna () in ! ibm ! com>
Date:       2004-12-17 17:11:13
Message-ID: 20041217165913.GA4424 () in ! ibm ! com
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I could only take a quick look but might have missed something
here -- are you specifying O_SYNC in the write case ? If you
aren't using -S, that likely explains the results ...

Regards
Suparna

On Tue, Dec 14, 2004 at 04:03:27PM -0800, Mark Wong wrote:
> Hi Suparna,
> 
> Sorry for the delay, here are the latest results with your patches:
> 	http://developer.osdl.org/markw/aio.html
> 
> I reran the older tests because the test parameters were not
> verifyiable.  Even though the test was echoing the command it was
> using, at some point it wasn't really echoing the parameters it was
> really using.
> 
> I also added results against ext3, but I haven't varied the block
> sizes yet.
> 
> Mark
> 
> On Fri, Dec 03, 2004 at 06:56:05PM +0530, Suparna Bhattacharya wrote:
> > Hello Mark,
> > 
> > I recently uploaded a patchset against 2.6.10-rc2. 
> > 
> > http://www.kernel.org/pub/linux/kernel/people/suparna/aio/2610-rc2/
> > 
> > The patches need to be applied in the order specified in the "series"
> > file.
> > 
> > This includes the AIO O_SYNC support.
> > I would be interested in test reports or results.
> > 
> > AIO read is still pending at the moment.
> > 
> > Regards
> > Suparna
> > 
> > On Thu, Nov 25, 2004 at 11:57:08AM -0800, Mark Wong wrote:
> > > Hi Suparna,
> > > 
> > > I've been working with folks at MySQL in tuning an OLTP workload with
> > > their database.  I'm still playing a bit of catch up but I was
> > > reviewing the results Judith had posted with aio-stress and it looked
> > > like the big win was with the AIO reads, at least with that test.  As
> > > I'm also not up to speed with the how AIO is implemented in MySQL,
> > > I'll copy them and let them comment appropriately.
> > > 
> > > As for the AIO O_SYNC patches you pasted recently, I've started
> > > compiling more results here:
> > > 	http://developer.osdl.org/markw/aio.html
> > > 
> > > An improvement over what Judith reported for 2.6.9-rc2-mm4.  As I'm
> > > continually testing things with MySQL, I would like to try to keep up
> > > with any patches you're working on.
> > > 
> > > Thanks,
> > > Mark
> > > 
> > > On Thu, Nov 25, 2004 at 07:19:32PM +0530, Suparna Bhattacharya wrote:
> > > > Hello Mark,
> > > > 
> > > > Sorry, the answer would be not as yet. I have instead been rewriting
> > > > some of the code to fit better with William Irwin's wait bit changes,
> > > > as well as some other simplications.
> > > > 
> > > > I posted a set of patches towards that earlier this month,
> > > > against 2.6.10-rc1. Now I have a patch for AIO O_SYNC write
> > > > that is based on those changes which I should be able to
> > > > post very soon.
> > > > 
> > > > Would AIO O_SYNC writes suffice for you, or do you need AIO read
> > > > as well ? [I was waiting for resolution of some issues related
> > > > to some of the recent VFS readahead design changes so I could
> > > > redo AIO read more elegantly, but if it is important 
> > > > to get it to you earlier, I can work bringing up a patch
> > > > rightaway]
> > > > 
> > > > Regards
> > > > Suparna
> > > > 
> > > > On Wed, Nov 24, 2004 at 08:20:10AM -0800, Mark Wong wrote:
> > > > > Hi Suparna,
> > > > > 
> > > > > Have the aio patches been updated for versions later than 2.6.8.1?
> > > > > 
> > > > > Thanks,
> > > > > Mark
> > > > 
> > > --
> > > To unsubscribe, send a message with 'unsubscribe linux-aio' in
> > > the body to majordomo@kvack.org.  For more info on Linux AIO,
> > > see: http://www.kvack.org/aio/
> > > Don't email: <a href=mailto:"aart@kvack.org">aart@kvack.org</a>
> > 
> > -- 
> > Suparna Bhattacharya (suparna@in.ibm.com)
> > Linux Technology Center
> > IBM Software Lab, India
> > 
> > --
> > To unsubscribe, send a message with 'unsubscribe linux-aio' in
> > the body to majordomo@kvack.org.  For more info on Linux AIO,
> > see: http://www.kvack.org/aio/
> > Don't email: <a href=mailto:"aart@kvack.org">aart@kvack.org</a>
> 
> -- 
> Mark Wong - - markw@osdl.org
> Open Source Development Lab Inc - A non-profit corporation
> 12725 SW Millikan Way - Suite 400 - Beaverton, OR 97005
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> --
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> see: http://www.kvack.org/aio/
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-- 
Suparna Bhattacharya (suparna@in.ibm.com)
Linux Technology Center
IBM Software Lab, India

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