Re: Centrino speedstep

Johan Vromans
2004-12-30T10:51:57Z

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