* Pandu Poluan <pa...@poluan.info> [130920 03:45]:
> Hello list!
>
> Does anyone know the meaning of the 'number between brackets' in the
> "power management" line of /proc/cpuinfo?
>
> For instance (I snipped the "flags" line to not clutter the email:
>
> processor : 0
> vendor_id : AuthenticAMD
> cpu family : 21
> model : 2
> model name : AMD Opteron(tm) Processor 6386 SE
> stepping : 0
> cpu MHz : 2800.110
> cache size : 2048 KB
> fdiv_bug : no
> hlt_bug : no
> f00f_bug : no
> coma_bug : no
> fpu : yes
> fpu_exception : yes
> cpuid level : 13
> wp : yes
> flags : --snip--
> bogomips : 5631.71
> clflush size : 64
> cache_alignment : 64
> address sizes : 48 bits physical, 48 bits virtual
> power management: ts ttp tm 100mhzsteps hwpstate [9] [10]
>
> What's "[9]" and "[10]" supposed to mean?
>
> (Note: The OS is not actually Gentoo, but this list is sooo
> knowledgeable, and methinks the output of /proc/cpuinfo is quite
> universal...)
I don't know for sure but looking in arch/x86/cpu/{powerflags,proc}.c it
looks like your kernel doesn't have a text description for power flag
bits 9 and 10.
In Linux 3.11.1 they are:
[9] - "cpb", /* core performance boost */
[10] - "eff_freq_ro", /* Readonly aperf/mperf */
Todd
