From: Lee Braiden <lee_b@member.fsf.org>
To: linuxppc-dev@lists.linuxppc.org, debian-powerpc@lists.debian.org
Subject: Re: SMP kernels on single processor machines
Date: Thu, 20 May 2004 12:48:24 +0100 [thread overview]
Message-ID: <40AC9B08.7010602@member.fsf.org> (raw)
In-Reply-To: <hhad03tlet.fsf@alsvidh.mathematik.uni-muenchen.de>
Jens Schmalzing wrote:
>SMP kernels run
>fine on single processor machines. I have repeatedly been told,
>however, that this bears a considerable performance hit on some
>hardware. Can anybody confirm or deny this? Even small hints would
>be appreciated.
>
>
A long time ago, I used to compile SMP into my kernels just on the
coolness factor, and on the promise that 'one day, soon, I'll get me a
decent machine' :)
But I quit doing that at some point, after someone (authoritative, but I
can't remember the details) pointed out that it added complexity,
debugging issues, etc. Given that I *already* have problems with PPC
kernels -- latency/lockups, (preempting?), alsa sound, video res, etc.,
I personally wouldn't go near this until I'm fairly confident that the
other stuff is solid in its own right.
But then, I'm just a luser, not a kernel maintainer ;D
--
Lee Braiden
lee_b@member.fsf.org
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2004-05-20 11:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-20 10:58 SMP kernels on single processor machines Jens Schmalzing
2004-05-20 11:48 ` Lee Braiden [this message]
2004-05-20 23:56 ` Benjamin Herrenschmidt
2004-05-21 10:34 ` Giuliano Pochini
2004-05-21 11:11 ` Benjamin Herrenschmidt
2004-05-21 12:30 ` Lee Braiden
2004-05-21 12:58 ` Marius Groeger
2004-05-21 23:11 ` Benjamin Herrenschmidt
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