Date: Wed, 19 Nov 2008 12:58:54 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-hackers@freebsd.org Cc: freebsd-current@freebsd.org, freebsd-smp@freebsd.org Subject: Re: Core i7 anyone else? Message-ID: <4923FF7E.1080101@freebsd.org> In-Reply-To: <200811191144.mAJBi3Lg004559@sana.init-main.com> References: <200811191144.mAJBi3Lg004559@sana.init-main.com>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigCFC1809BFB1D0993DBF70FC6 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Takanori Watanabe wrote: > Hi, I recently bought Core i7 machine(for 145,000JPY: about $1500) > and sometimes hangs up oddly. > When in the state, some specific process only works and=20 > replys ping, but not reply any useful information. >=20 > I suspect it may caused by CPU power management, so I cut=20 > almost all CPU power management feature on BIOS parameter. >=20 > Are there any people encouterd such trouble? > And on this machine build world in SCHED_ULE(15min.) is slower=20 > than SCHED_4BSD(12min.). I don't know but this: > =3D=3D=3Ddmesg=3D=3D=3D > http://www.init-main.com/corei7.dmesg > or > http://pastebin.com/m187f77aa > (if host is down) CPU: Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz (2684.00-MHz 686-class CPU) Origin =3D "GenuineIntel" Id =3D 0x106a4 Stepping =3D 4 Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PG= E,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> Features2=3D0x98e3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,P= DCM,SSE4.1,SSE4.2,POPCNT> AMD Features=3D0x28100000<NX,RDTSCP,LM> AMD Features2=3D0x1<LAHF> Cores per package: 8 Logical CPUs per core: 2 real memory =3D 3211264000 (3062 MB) avail memory =3D 3143983104 (2998 MB) ACPI APIC Table: <7522MS A7522100> FreeBSD/SMP: Multiprocessor System Detected: 8 CPUs cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC ID: 1 cpu2 (AP): APIC ID: 2 cpu3 (AP): APIC ID: 3 cpu4 (AP): APIC ID: 4 cpu5 (AP): APIC ID: 5 cpu6 (AP): APIC ID: 6 cpu7 (AP): APIC ID: 7 is a bit in conflict with this: > kern.sched.topology_spec: <groups> > <group level=3D"1" cache-level=3D"0"> > <cpu count=3D"8" mask=3D"0xff">0, 1, 2, 3, 4, 5, 6, 7</cpu> > <flags></flags> > </group> > </groups> =46rom what I know of its architecture i7 has hyperthreading - i.e. the CPU has 4 "real" cores which are hyperthreaded, so you get 8 cores total. It probably also includes a different way of enumerating its topology which might have caused wrong topology detection and your slowdown in buildworld. (the CPU also has L3 cache, but I think it's not looked up in topology detection). I don't know it this particular error could be responsible for your lockups - probably not. The CPU also introduces some big changes in power management (dynamic powerdown of individual cores) which could cause them - but I can't help you there. Are you sure it's not something trivial like overheating? --------------enigCFC1809BFB1D0993DBF70FC6 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFJI/9+ldnAQVacBcgRAptBAKCvy5iMZkVJ7f/v/8jWVRvs0Oa1vwCgnlPY fl3ySAZXU5NXl0ZmOXf43t4= =hTDW -----END PGP SIGNATURE----- --------------enigCFC1809BFB1D0993DBF70FC6--
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