Re: [Powertop] Does PowerTop support MHz numbers for Intel Xeon L5410 CPUs ?
Arjan van de Ven <arjan at linux.intel.com>
| Newsgroups | dev.linux.lists.powertop |
|---|---|
| Message-ID | <[email protected]> |
> not sure that powertop performs any specific MSRs at all, since most of MSRs are
> called correspondingly to c-state flags (has_cXXX), e.g.
>
> __init:
> if (model == 0x45 || model ==0x3D)
> has_c8c9c10_res = 1;
>
>
>
> and later:
>
> if (has_c8c9c10_res) {
> c8_before = get_msr(number, MSR_PKG_C8_RESIDENCY);
> c9_before = get_msr(number, MSR_PKG_C9_RESIDENCY);
> c10_before = get_msr(number, MSR_PKG_C10_RESIDENCY);
> }
>
> and so on.
but if the set is empty, you don't get any data, and the "emulation" side of powertop
is likely a better choice... since there are C states, just not counters.