CPU Problem?
Jonathan Berry
berryja at gmail.com
Sun Nov 14 21:44:52 UTC 2004
Hi Oliver,
On Sun, 14 Nov 2004 22:12:35 +0100, Oliver Kiessler
<oliver.kiessler at gmail.com> wrote:
> hi!
>
> When i call "cat /proc/cpuinfo" on fedora core 3 (kernel 2.6.9) on my
> dell inspiron 5150 notebook it shows the following:
>
> processor : 0
> vendor_id : GenuineIntel
> cpu family : 15
> model : 2
> model name : Mobile Intel(R) Pentium(R) 4 CPU 3.06GHz
> stepping : 9
> cpu MHz : 1595.024
> cache size : 512 KB
> fdiv_bug : no
> hlt_bug : no
> f00f_bug : no
> coma_bug : no
> fpu : yes
> fpu_exception : yes
> cpuid level : 2
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
> xtpr
> bogomips : 3154.27
>
> When I call that command on the same machine in debian sarge (kernel
> 2.4.27), it shows this:
>
> processor : 0
> vendor_id : GenuineIntel
> cpu family : 15
> model : 2
> model name : Mobile Intel(R) Pentium(R) 4 CPU 3.06GHz
> stepping : 9
> cpu MHz : 3056.552
> cache size : 512 KB
> fdiv_bug : no
> hlt_bug : no
> f00f_bug : no
> coma_bug : no
> fpu : yes
> fpu_exception : yes
> cpuid level : 2
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca
> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
> bogomips : 6094.84
>
> Fedora recognizes the p4 mobile 3ghz as 1595.024 mhz and not as
> 3056.552 mhz as in debian??! How can that be?
>
> regards, oliver
>
Frequency scaling is working differently between the two OSs. This is
probably due to the 2.4 vs 2.6 kernels. Are you running a frequency
scaling daemon (cpufreqd or similar)? Try doing something CPU
intensive in Fedora and running the cat /proc/cpuinfo and see if the
frequency is different. See if you have a directory
/sys/devices/system/cpu/cpu0/cpufreq/ with "files" in it? If so, cat
some of those files and see what they have in them.
Jonathan
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