Re: Centrino speedstep

[Johan Vromans <jvromans-2pNSKKP3PSKEVqv0pETR8A@public.gmane.org>]

Dominik Brodowski <linux-X3ehHDuj6sIIGcDfoQAp7BvVK+yQ3ZXh@public.gmane.org> writes:

> Run "x86info --mhz" and you'll most probably see the CPU runs at 1.5GHz 
> even though it is reported by ACPI as 1.6GHz. 

Hmm. x86info doesn't seem to produce reliable figures:

  # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
  600000
  # x86info --mhz
  x86info v1.12b.  Dave Jones 2001-2003
  Feedback to <davej-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>.

  Found 1 CPU
  --------------------------------------------------------------------------
  unknown TLB/cache descriptor:   0xf0
  unknown TLB/cache descriptor:   0x7d
  Family: 6 Model: 13 Stepping: 6 Type: 0 Brand: 6
  CPU Model: Unknown CPU Original OEM
  Instruction TLB: 4K pages, 4-way associative, 128 entries.
  Data TLB: 4K pages, 4-way associative, 128 entries.
  Instruction TLB: 4MB pages, fully associative, 2 entries
  unknown TLB/cache descriptor:   0xf0
  unknown TLB/cache descriptor:   0x7d
  L1 Instruction cache:
          :Size 32KB      8-way associative.
          line size=64 bytes.
  Data TLB: 4MB pages, 4-way associative, 8 entries
  L1 Data cache:
          Size: 32KB      8-way associative.
          line size=64 bytes.
  100MHz processor (estimate).

  # cat /proc/cpuinfo
  processor       : 0
  vendor_id       : GenuineIntel
  cpu family      : 6
  model           : 13
  model name      : Intel(R) Pentium(R) M processor 1.50GHz
  stepping        : 6
  cpu MHz         : 599.502
  cache size      : 2048 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 mce cx8 sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe est tm2
  bogomips        : 1189.47

-- Johan


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