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SubjectRe: RT patch acceptance
how much of a slowdown is it?

distros already throw >20% performance improvements on the floor to
simplify their lives by reduceing the number of different binary kernels
they have to support.

somehow I don't think a 5% or so (which is the locking overhead of running
a SMP kernel on UP last I heard) would be the end of the world for them,
especially if it made multimedia eye candy work smoother.

David Lang

On Tue, 31 May 2005, Andi Kleen wrote:

> Date: 31 May 2005 22:01:14 +0200 Tue, 31 May 2005 22:01:14 +0200
> From: Andi Kleen <ak@muc.de>
> To: Steven Rostedt <rostedt@goodmis.org>
> Cc: karim@opersys.com, linux-kernel@vger.kernel.org, akpm@osdl.org,
> hch@infradead.org, dwalker@mvista.com, Ingo Molnar <mingo@elte.hu>,
> Sven-Thorsten Dietrich <sdietrich@mvista.com>,
> James Bruce <bruce@andrew.cmu.edu>, kus Kusche Klaus <kus@keba.com>,
> Nick Piggin <nickpiggin@yahoo.com.au>, Esben Nielsen <simlo@phys.au.dk>,
> "Bill Huey (hui)" <bhuey@lnxw.com>
> Subject: Re: RT patch acceptance
>
> On Tue, May 31, 2005 at 12:29:35PM -0400, Steven Rostedt wrote:
>> I would assume that the distros would ship without PREEMPT enabled
>> because it was (and probably still is) considered unstable.
>
> In addition to that it is slow too due to much increased locking
> overhead.
>
> -Andi
> -
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