From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Marius Groeger <mgroeger@sysgo.com>
Cc: Lee Braiden <lee_b@member.fsf.org>,
"debian-powerpc@lists.debian.org"
<debian-powerpc@lists.debian.org>,
linuxppc-dev list <linuxppc-dev@lists.linuxppc.org>
Subject: Re: SMP kernels on single processor machines
Date: Sat, 22 May 2004 09:11:26 +1000 [thread overview]
Message-ID: <1085181086.8030.9.camel@gaston> (raw)
In-Reply-To: <Pine.LNX.4.56.0405211454220.26114@mag.sysgo.com>
On Fri, 2004-05-21 at 22:58, Marius Groeger wrote:
> FWIW, CONFIG_PREEMPT _does_ reduce the avarage scheduling latency.
> It's still sort of soft real-time, but the effect is measurable (I'm
> talking 2.4 kernels here, BTW) However, on desktop systems you
> probably don need to worry about this, but for an embedded system you
> may like the slightly improved reaction time.
Well... average latency is mostly meaningless, only peak latency really
matters for anything that need some sort of real time imho...
Ben.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
prev parent reply other threads:[~2004-05-21 23:11 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
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 [this message]
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