From owner-freebsd-current@FreeBSD.ORG  Mon May  4 18:08:09 2009
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from [127.0.0.1] (freefall.freebsd.org [IPv6:2001:4f8:fff6::28])
	by hub.freebsd.org (Postfix) with ESMTP id 032E8106564A;
	Mon,  4 May 2009 18:08:09 +0000 (UTC)
	(envelope-from jkim@FreeBSD.org)
From: Jung-uk Kim <jkim@FreeBSD.org>
To: pluknet <pluknet@gmail.com>
Date: Mon, 4 May 2009 14:07:53 -0400
User-Agent: KMail/1.6.2
References: <20090430013428.cb4f804b.nork@FreeBSD.org>
	<200905011610.42613.jkim@FreeBSD.org>
	<a31046fc0905020050y3d4eef1ao5944b8e4c204514c@mail.gmail.com>
In-Reply-To: <a31046fc0905020050y3d4eef1ao5944b8e4c204514c@mail.gmail.com>
MIME-Version: 1.0
Content-Disposition: inline
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <200905041407.56204.jkim@FreeBSD.org>
Cc: freebsd-current@freebsd.org, Jeff Roberson <jroberson@jroberson.net>
Subject: Re: cannot compile sched_ule without options SMP
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 04 May 2009 18:08:09 -0000

On Saturday 02 May 2009 03:50 am, pluknet wrote:
> 2009/5/2 Jung-uk Kim <jkim@freebsd.org>:
> > On Thursday 30 April 2009 11:04 pm, pluknet wrote:
> >> 2009/5/1 pluknet <pluknet@gmail.com>:
> >> > 2009/5/1 Jeff Roberson <jroberson@jroberson.net>:
> >> >> On Thu, 30 Apr 2009, pluknet wrote:
> >> >>> 2009/4/30 Jeff Roberson <jroberson@jroberson.net>:
> >> >>>> On SMP machines you should now see output like this:
> >> >>>> FreeBSD/SMP: Multiprocessor System Detected: 8 CPUs
> >> >>>> FreeBSD/SMP: 1 package(s) x 4 core(s) x 2 SMT threads
> >> >>>>
> >> >>>> If you detect any irregularities with
> >> >>>> kern.sched.topology_spec or this dmesg
> >> >>>> line please report them.
> >> >>>
> >> >>> Hi, Jeff.
> >> >>>
> >> >>> I have such mismatch. This is an Intel E7200.
> >> >>>
> >> >>> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
> >> >>> FreeBSD/SMP: 1 package(s) x 1 core(s) x 2 HTT threads
> >> >>> cpu0 (BSP): APIC ID:  0
> >> >>> cpu1 (AP/HT): APIC ID:  1
> >> >>>
> >> >>> So it should be instead: 1 package(s) x 2 core(s)
> >> >>> cpu0 (BSP): APIC ID:  0
> >> >>> cpu1 (AP): APIC ID:  1
> >> >>
> >> >> Can you please repeat the following steps as I have done
> >> >> here:
> >> >
> >> > (kgdb) p/x cpu_high
> >> > $1 = 0x2
> >> > (kgdb) p/x cpu_cores
> >> > $2 = 0x1
> >> > (kgdb) p/x cpu_logical
> >> > $3 = 0x2
> >> > (kgdb) p/x cpu_feature
> >> > $4 = 0xbfebfbff
> >> > (kgdb) p/x logical_cpus
> >> > $5 = 0x2
> >> > (kgdb) p/x hyperthreading_cpus
> >> > $6 = 0x2
> >>
> >> Follow up myself:
> >>
> >> What is embarrassing me is HTT feature enabled. May the reason
> >> be in a buggy CPUID ?
> >
> > No, the flag does not mean it supports Hyperthreading.  It means
> > more than one logical core is supported (multi-threading)
> > although the name didn't change for historical reason. ;-)
>
> I see now.
>
> > Can you try the attached patch?
>
> Nice, it works!

Committed slightly different version.

http://svn.freebsd.org/viewvc/base?view=revision&revision=191788

Thanks!

Jung-uk Kim