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List:       freebsd-stable
Subject:    Re: Why does FreeBSD 8.-0 think that my Dell SX260 have "non-unform
From:       Ian Smith <smithi () nimnet ! asn ! au>
Date:       2009-12-31 7:56:34
Message-ID: 20091231184327.I93577 () sola ! nimnet ! asn ! au
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On Wed, 30 Dec 2009, Torfinn Ingolfsen wrote:
 > On Wed, 23 Dec 2009 17:08:58 +1100 (EST)
 > Ian Smith <smithi@nimnet.asn.au> wrote:
 > > On Wed, 23 Dec 2009, Torfinn Ingolfsen wrote:
 > >  > 
 > >  > I don't know.  Since last time, I've upgraded the bios to the
 > >  > latest (A03) and reset bios to default values - but the problem is
 > >  > still there. According to the specs, a SX260 supports all Pentium
 > >  > 4 cpus with 400 MHz and 533 MHz FSB (front side bus).
 > > 
 > > Yes, this is your problem, regarding speed anyway.  I only picked up
 > > on this because this year we bought 2 used intel mobos on eBay; a
 > > D845GBV with a 2GHz P4 (also 400/533 MHz FSB with similar 845 chips
 > > to yours) and the other a D865GLC with a 2.6GHz HTT P4 (400/533/800
 > > MHz FSB).
 > 
 > You're right, of course. :-)

Well, 'for once' :)

 > I found a Pentium 4 with 400 Mhz FSB, it looks much better now:
 > FreeBSD 7.2-STABLE #6: Sun Oct 11 11:14:33 CEST 2009
 >     root@kg-work2.kg4.no:/usr/obj/usr/src/sys/SX270
 > Timecounter "i8254" frequency 1193182 Hz quality 0
 > CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz (1992.63-MHz 686-class CPU)
 >   Origin = "GenuineIntel"  Id = 0xf27  Stepping = 7
 >   Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  >   Features2=0x4400<CNXT-ID,xTPR>
 > real memory  = 2145849344 (2046 MB)
 > 
 > and  FreeBSD 8.0 doesn't say anything about "non-unform cpu" anymore.  ;^)

Great.  Your 2GHz P4 is a later stepping which has HTT also, ours is:
  CPU0: Intel(R) Pentium(R) 4 CPU 2.00GHz stepping 04
  Total of 1 processors activated (4003.47 BogoMIPS).
as Debian dmesg tells it.

But I still don't know whether it's nowadays safe and/or advantageous 
running hyperthreading on these CPUs in FreeBSD?  Anyone?

cheers, Ian
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