Date: Thu, 21 Apr 2011 19:04:17 +1000 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: Sergey Kandaurov <pluknet@gmail.com> Cc: Daniel Gerzo <danger@freebsd.org>, freebsd-stable@freebsd.org, Alexander Motin <mav@freebsd.org>, John Baldwin <jhb@freebsd.org> Subject: Re: kern.smp.maxid error on i386 UP [was: powerd / cpufreq question] Message-ID: <20110421181014.R43371@sola.nimnet.asn.au> In-Reply-To: <BANLkTimUCDg7-t9DRubh8LHDdcQv-8Gr0Q@mail.gmail.com> References: <4D9EEDAF.3020803@rulez.sk> <20110411125416.S35056@sola.nimnet.asn.au> <4DA37E31.4020700@FreeBSD.org> <20110413024230.Y35056@sola.nimnet.asn.au> <20110420164100.Y43371@sola.nimnet.asn.au> <BANLkTi=7eS5CC0BMO2WdzasD61g5oCzZpA@mail.gmail.com> <BANLkTimUCDg7-t9DRubh8LHDdcQv-8Gr0Q@mail.gmail.com>
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On Wed, 20 Apr 2011, Sergey Kandaurov wrote: > On 20 April 2011 22:29, Sergey Kandaurov <pluknet@gmail.com> wrote: > > On 20 April 2011 21:02, Ian Smith <smithi@nimnet.asn.au> wrote: [..] > >> Very happy to test any patches etc. > >> > > > > Ouch. > > Looks like that affects a system with 2 cores as well. > > Intel Core2 E7200, 8.2-R i386 SMP: > > > > kern.smp.forward_signal_enabled: 1 > > kern.smp.topology: 0 > > kern.smp.cpus: 2 > > kern.smp.disabled: 0 > > kern.smp.active: 1 > > kern.smp.maxcpus: 32 > > kern.smp.maxid: 31 > > > > kern.cp_times: 867360 171 429180 70114 170549535 1385294 306 176659 82618 > > 170270900 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > > 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > > 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > > 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > > 0 0 0 0 0 0 0 Ah, well my quick n dirty fix wouldn't even have helped in that case. > Perhaps that was so from the begging: the problem is seen also on > 6.4 i386 SMP 8 core. Here it was just set to (MAXCPU-1). Slightly surprising that it went so long unnoticed on SMP boxes, I guess nothing actually fell over due to just inefficiency. > The buggy mp_maxid was fixed in HEAD with r215009, though not merged. > The patch works on my 8.2 Core2 SMP i386 system. > > -- > wbr, > pluknet Thanks Sergey. Confirming the patch works fine on my non-APIC UP i386: kern.smp.cpus: 1 kern.smp.disabled: 0 kern.smp.active: 0 kern.smp.maxcpus: 32 kern.smp.maxid: 0 kern.cp_times: 1123 2 1414 5621 277346 cheers, Ian
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