Re: [PATCH] arm64: dts: mediatek: mt8192: Fix CPUs capacity-dmips-mhz

[Matthias Brugger]

On 05/06/2023 10:21, AngeloGioacchino Del Regno wrote:
> Il 02/06/23 20:35, Nícolas F. R. A. Prado ha scritto:
> > The capacity-dmips-mhz parameter was miscalculated: this SoC runs
> > the first (Cortex-A55) cluster at a maximum of 2000MHz and the
> > second (Cortex-A76) cluster at a maximum of 2200MHz.
> >
> > In order to calculate the right capacity-dmips-mhz, the following
> > test was performed:
> > 1. CPUFREQ governor was set to 'performance' on both clusters
> > 2. Ran dhrystone with 500000000 iterations for 10 times on each cluster
> > 3. Calculated the mean result for each cluster
> > 4. Calculated DMIPS/MHz: dmips_mhz = dmips_per_second / cpu_mhz
> > 5. Scaled results to 1024:
> >     result_c0 = dmips_mhz_c0 / dmips_mhz_c1 * 1024
> >
> > The mean results for this SoC are:
> > Cluster 0 (LITTLE): 12016411 Dhry/s
> > Cluster 1 (BIG): 31702034 Dhry/s
> >
> > The calculated scaled results are:
> > Cluster 0: 426.953226899238 (rounded to 427)
> > Cluster 1: 1024
> >
> > Fixes: 48489980e27e ("arm64: dts: Add Mediatek SoC MT8192 and evaluation board 
> > dts and Makefile")
> > Signed-off-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>

Applied, thanks
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>