Am Freitag, 12. April 2019, 02:01:58 CEST schrieb Matthias Kaehlcke:
> The value was determined with the following method:
>
> - take CPUs 1-3 offline
> - for each OPP
> - set cpufreq min and max freq to OPP freq
> - start dhrystone benchmark
> - measure CPU power consumption during 10s
> - calculate Cx for OPPx
> - Cx = (Px - P1) / (Vx²fx - V1²f1) [1]
> using the following units: mW / Ghz / V [2]
> - C = avg(C2, ..., Cn)
>
> [1] see commit 4daa001a1773 ("arm64: dts: juno: Add cpu
> dynamic-power-coefficient information")
> [2] https://patchwork.kernel.org/patch/10493615/#22158551
>
> FTR, these are the values for the different OPPs:
>
> freq (kHz) mV Px (mW) Cx
>
> 126000 900 39
> 216000 900 66 370
> 312000 900 95 372
> 408000 900 122 363
> 600000 900 177 359
> 696000 950 230 363
> 816000 1000 297 361
> 1008000 1050 404 362
> 1200000 1100 528 362
> 1416000 1200 770 377
> 1512000 1300 984 385
> 1608000 1350 1156 394
>
> Signed-off-by: Matthias Kaehlcke <[email protected]>
I've applied this for 5.2 but moved the new entries
below the clock properties for some more alphabetic ordering.
Heiko
