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

From: Nícolas F. R. A. Prado
Date: Tue Jun 06 2023 - 09:01:15 EST


On Tue, Jun 06, 2023 at 08:38:42AM +0200, Matthias Brugger wrote:
>
>
> 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

Hi Matthias,

this patch doesn't show in your v6.4-next/dts64 branch, while the other patch
you just applied does, so I just wanted to double check it was really applied.

Thanks,
Nícolas