Re: [gentoo-amd64] Is /proc/cpuinfo showing the actual frequency ?

[Thanasis]

on 02/19/2009 07:46 PM Paul Hartman wrote the following: On Thu, Feb 19, 2009 at 10:55 AM, Justin <jus...@j-schmitz.net> wrote: Thanasis schrieb: on 02/19/2009 06:23 PM Justin wrote the following: Thanasis schrieb: # uname -a Linux wolfdale 2.6.28-gentoo-r2 #1 SMP PREEMPT Wed Feb 18 13:53:22 EET 2009 x86_64 Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz GenuineIntel GNU/Linux Overclocked the core 2 duo (E8400) from 3 to 4GHz using motherboard BIOS settings. In mswindblows I can see the overclocked frequency (when cpu is under load), in linux /proc/cpuinfo never shows beyond the stock 3GHz value. Q: Is /proc/cpuinfo showing the actual frequency? Do you have frequency scaling active? Yes, but the /proc/cpuinfo I showed, was with the max frequency ever displayed (under load). AFAIK the scaling will interfere with OC. Try to disable it and check again. I just did some googling and it seems that frequency scaling in linux only works with the stock speed steps, not the OC'ed speed. I bet if I disable frequency scaling from BIOS, it will show 4GHz, because the funny thing is that inside a fully VM (guest) it shows the "real" freq ;-) # cat cpuinfo processor    : 0 vendor_id    : GenuineIntel cpu family    : 6 model        : 23 model name    : Intel(R) Core(TM)2 Duo CPU     E8400  @ 3.00GHz stepping    : 10 cpu MHz        : 4050.236 cache size    : 6144 KB fpu        : yes fpu_exception    : yes cpuid level    : 13 wp        : yes flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts mmx fxsr sse sse2 ss syscall nx lm pni ds_cpl cx16 xtpr lahf_lm bogomips    : 8111.05 clflush size    : 64 cache_alignment    : 64 address sizes    : 36 bits physical, 48 bits virtual power management: processor    : 1 vendor_id    : GenuineIntel cpu family    : 6 model        : 23 model name    : Intel(R) Core(TM)2 Duo CPU     E8400  @ 3.00GHz stepping    : 10 cpu MHz        : 4050.236 cache size    : 6144 KB fpu        : yes fpu_exception    : yes cpuid level    : 13 wp        : yes flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts mmx fxsr sse sse2 ss syscall nx lm pni ds_cpl cx16 xtpr lahf_lm bogomips    : 8101.80 clflush size    : 64 cache_alignment    : 64 address sizes    : 36 bits physical, 48 bits virtual power management: