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From: Daniel Phillips <phillips@arcor.de>
To: Nathan Straz <nstraz@sgi.com>, linux-kernel@vger.kernel.org
Subject: Re: 2.2 and 2.4 performance issues
Date: Fri, 21 Jun 2002 22:13:09 +0200
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On Friday 21 June 2002 19:10, Nathan Straz wrote:
> On Fri, Jun 21, 2002 at 05:55:55PM +0100, Luis Pedro de Moura Ribeiro Pinto wrote:
> > I was asked (i'm a company freshman) to perform some tests between
> > kernel versions 2.2 and 2.4, and after awhile searching i found a good
> > set of benchmarking tools (aim7) from Caldera linux. 
> 
> Benchmarks are evil.  Sure they are useful at times, but for the most
> part they get misused.

There's no sense denying evidence that 2.2 outperforms 2.4 under certain
workloads.  Instead we should just be more determined to root out all
those problems and deal with them.  There is no inherent design reason
why 2.4 should be slower than 2.2 in any area at all, however, some
practical issues, such as IO scheduling still remain and are being
actively worked on.  Expect backports from 2.5 later in the 2.4 series.
For now, the one thing we must not do is risk instability in 2.4, now
that most users have switched over to it.

-- 
Daniel
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