Date: Mon, 4 May 2009 14:07:53 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: pluknet <pluknet@gmail.com> Cc: freebsd-current@freebsd.org, Jeff Roberson <jroberson@jroberson.net> Subject: Re: cannot compile sched_ule without options SMP Message-ID: <200905041407.56204.jkim@FreeBSD.org> In-Reply-To: <a31046fc0905020050y3d4eef1ao5944b8e4c204514c@mail.gmail.com> References: <20090430013428.cb4f804b.nork@FreeBSD.org> <200905011610.42613.jkim@FreeBSD.org> <a31046fc0905020050y3d4eef1ao5944b8e4c204514c@mail.gmail.com>
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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
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