Messages in this thread | | | Date | Tue, 2 Jun 2015 16:38:20 -0700 | From | Andi Kleen <> | Subject | Re: [PATCH RFC] x86, tsc: Allow for high latency in quick_pit_calibrate() |
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On Tue, Jun 02, 2015 at 11:03:26PM +0200, Thomas Gleixner wrote: > > > On Tue, 2 Jun 2015, Andi Kleen wrote: > > > > There's the code in tsc_msr.c. It should be relatively > > > straightforward to extend it to cover everything that intel_pstate > > > supports. > > > > That's a good idea, but we still need an always working fallback when the > > model number is not available. So Adrian's patch is needed in any > > case. > > Nonsense. The slow calibration is already a working fallback.
Please read Adrian's description again. It's not working when the PIT read is too slow. That is when the new algorithm is needed.
-Andi
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