netdev - Re: [tbench regression fixes]: digging out smelly deadmen.

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Message-Id: <20081027.124848.163119274.davem@davemloft.net>
Date:	Mon, 27 Oct 2008 12:48:48 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	zbr@...emap.net
Cc:	mingo@...e.hu, alan@...rguk.ukuu.org.uk, jkosina@...e.cz,
	akpm@...ux-foundation.org, a.p.zijlstra@...llo.nl, efault@....de,
	rjw@...k.pl, s0mbre@...rvice.net.ru, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [tbench regression fixes]: digging out smelly deadmen.

From: Evgeniy Polyakov <zbr@...emap.net>
Date: Mon, 27 Oct 2008 22:39:34 +0300

> On Mon, Oct 27, 2008 at 07:33:12PM +0100, Ingo Molnar (mingo@...e.hu) wrote:
> > The moment there's real IO it becomes harder to analyze but the same 
> > basic behavior remains: the more unfair the IO scheduler, the "better" 
> > dbench results we get.
> 
> Right now there is no disk IO at all. Only quite usual network and
> process load.

I think the hope is that by saying there isn't a problem enough times,
it will become truth. :-)

More seriously, Ingo, what in the world do we need to do in order to get
you to start doing tbench runs and optimizing things (read as: fixing
the regression you added)?

I'm personally working on a test fibonacci heap implementation for
the fair sched code, and I already did all of the cost analysis all
the way back to the 2.6.22 pre-CFS days.

But I'm NOT a scheduler developer, so it isn't my responsibility to do
this crap for you.  You added this regression, why do I have to get my
hands dirty in order for there to be some hope that these regressions
start to get fixed?
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