linux-kernel - Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

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Date:	Thu, 1 Mar 2007 17:57:42 +0300
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Eric Dumazet <dada1@...mosbay.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Pavel Machek <pavel@....cz>,
	Theodore Tso <tytso@....edu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ulrich Drepper <drepper@...hat.com>,
	linux-kernel@...r.kernel.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>,
	Zach Brown <zach.brown@...cle.com>,
	"David S. Miller" <davem@...emloft.net>,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Davide Libenzi <davidel@...ilserver.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

On Thu, Mar 01, 2007 at 05:43:50PM +0300, Evgeniy Polyakov (johnpol@....mipt.ru) wrote:
> On Thu, Mar 01, 2007 at 02:12:50PM +0100, Eric Dumazet (dada1@...mosbay.com) wrote:
> > On Thursday 01 March 2007 12:47, Evgeniy Polyakov wrote:
> > >
> > > Could you provide at least remote way to find it?
> > >
> > 
> > Sure :)
> > 
> > > I only found the same problem at
> > > http://lkml.org/lkml/2006/10/27/3
> > >
> > > but without any hits to solve the problem.
> > >
> > > I will try CVS oprofile, if it works I will provide details of course.
> > >
> > 
> > # cat CVS/Root
> > CVS/Root::pserver:anonymous@...ofile.cvs.sourceforge.net:/cvsroot/oprofile
> > 
> > # cvs diff >/tmp/oprofile.diff
> > 
> > Hope it helps
> 
> One of the hunks failed, since it was in CVS already.
> After setting up some mirrors, I've installed all bits needed for
> oprofile.
> Attached kevent and epoll profiles.
> 
> In that tests I got epoll perf about 4400 req/s, kevent was about 5300.

Attached kevent profile with 6100 req/sec.
They all look exactly the same for me - there no kevent or epoll
functions in profiles at all.

-- 
	Evgeniy Polyakov

View attachment "profile.kevent" of type "text/plain" (12428 bytes)