Date: Mon, 4 May 2009 23:03:23 +0400 From: pluknet <pluknet@gmail.com> To: Jung-uk Kim <jkim@freebsd.org> Cc: freebsd-current@freebsd.org, Jeff Roberson <jroberson@jroberson.net> Subject: Re: cannot compile sched_ule without options SMP Message-ID: <a31046fc0905041203v3c3a3882l2c2be26b7c7e172f@mail.gmail.com> In-Reply-To: <200905041407.56204.jkim@FreeBSD.org> References: <20090430013428.cb4f804b.nork@FreeBSD.org> <200905011610.42613.jkim@FreeBSD.org> <a31046fc0905020050y3d4eef1ao5944b8e4c204514c@mail.gmail.com> <200905041407.56204.jkim@FreeBSD.org>
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2009/5/4 Jung-uk Kim <jkim@freebsd.org>: > 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 > Thank you! Just checked again on fresh current. P.S. For archives: now topology_spec looks slightly different, according to the change: kern.sched.topology_spec: <groups> <group level="1" cache-level="0"> <cpu count="2" mask="0x3">0, 1</cpu> <flags></flags> <children> <group level="3" cache-level="2"> <cpu count="2" mask="0x3">0, 1</cpu> <flags></flags> </group> </children> </group> </groups> -- wbr, pluknet
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