Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: Athlon 64 X2 cpuinfo oddities | Date | Mon, 9 Jan 2006 22:10:03 +0100 |
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Hi,
On Monday, 9 January 2006 21:18, Jesper Juhl wrote: > I recently bought a Dual Core AMD Athlon 64 X2 4400+ CPU and dropped a > 2.6.15 kernel on the box and it runs very nice, but /proc/cpuinfo > shows a few things that seem slightly odd to me (haven't tried earlier > kernels on this so I don't know if cpuinfo looked different > previously). > It may be that it's absolutely correct and not odd at all, but I > thought I'd just ask :) > > Here's what cat /proc/cpuinfo shows : > > juhl@dragon:~$ cat /proc/cpuinfo > processor : 0 > vendor_id : AuthenticAMD > cpu family : 15 > model : 35 > model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ > stepping : 2 > cpu MHz : 2200.260 > cache size : 1024 KB > physical id : 0 > siblings : 1 > core id : 0 > cpu cores : 1 > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 1 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge > mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext > fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy > bogomips : 4403.36 > > processor : 1 > vendor_id : AuthenticAMD > cpu family : 15 > model : 35 > model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ > stepping : 2 > cpu MHz : 2200.260 > cache size : 1024 KB > physical id : 127 > siblings : 1 > core id : 1 > cpu cores : 1 > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 1 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge > mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext > fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy > bogomips : 4399.53 > > > So, what's odd with that? > > Well, first of all you'll notice that the second core shows a > "physical id" of 127 while the first core shows an id of 0. Shouldn't > the second core be id 1, just like the "core id" fields are 0 & 1?
FWIW, I'm running 2.6.15 on Athlon X2 4200 and the second core's physical id is 0 (ie. same as of the frist one), the number of siblings for each core is 2, and the "cpu cores" value is 2 as well (yours is 1, apparently ;-)).
Greetings, Rafael - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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