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From: Artemio <artemio@artemio.net>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: SMP question
Date: Wed, 11 Jun 2003 23:13:30 +0300	[thread overview]
Message-ID: <200306112313.30903.artemio@artemio.net> (raw)
In-Reply-To: <MDEHLPKNGKAHNMBLJOLKMEJLDJAA.davids@webmaster.com>

Hello!

> > How much performance will I loose this way? Is SMP *THAT* critical?
>
> 	You will lose about half your CPU power.

Hmmm... So, you mean uni-processor Linux kernel can't see two processors as 
one "big" processor? 

> >  - Run all tasks in a usual way, no hard realtime, but with SMP support.
> >
> > What would you suggest?
>
> 	If you don't install a kernel with SMP support, you might as well remove
> one processor.

:-)

> > Also, if I turn hyperthreading off, how will it influence the
> > system with SMP
> > support? Without SMP support?
>
> 	In a system with more than one physical CPU, hyperthreading is not that
> big of a performance boost.

Okay, I will try turning hyperthreding off and see if RTLinux keeps hanging 
the machine.


Thanks for your reply!

Artemio.

  reply	other threads:[~2003-06-11 20:06 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-06-11 17:43 Artemio
2003-06-11 18:04 ` Tigran Aivazian
2003-06-11 19:38 ` Samuel Flory
2003-06-11 19:52   ` Artemio
2003-06-11 20:14     ` David Schwartz
2003-06-11 20:13       ` Artemio [this message]
2003-06-11 22:34         ` David Schwartz
2003-06-11 22:54         ` J.A. Magallon
2003-06-12  5:37           ` Artemio
2003-06-12 12:49             ` Matt Reppert
2003-06-12 17:25               ` Artemio
2003-06-12 14:02           ` Scott Robert Ladd
2003-06-12 20:59             ` J.A. Magallon
2003-06-11 21:25     ` Zwane Mwaikambo
     [not found] <Pine.LNX.4.44.0306111838360.20310-100000@coffee.psychology.mcmaster.ca>
2003-06-12  5:42 ` Artemio

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