linux-kernel - Aw: Re: Re: Re: [PATCH v3 0/5] arm: dts: mt7623: relocate gmacs, mt7530 switch, and add port@5

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Date:   Sun, 19 Feb 2023 14:52:14 +0100
From:   Frank Wunderlich <frank-w@...lic-files.de>
To:     Arınç ÜNAL <arinc.unal@...nc9.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, erkin.bozoglu@...ont.com
Subject: Aw: Re:  Re: Re: [PATCH v3 0/5] arm: dts: mt7623: relocate gmacs,
 mt7530 switch, and add port@5

> Gesendet: Samstag, 18. Februar 2023 um 20:34 Uhr
> Von: "Arınç ÜNAL" <arinc.unal@...nc9.com>
> An: frank-w@...lic-files.de
> On 18.02.2023 22:11, Frank Wunderlich wrote:
> > Am 18. Februar 2023 18:02:11 MEZ schrieb "Arınç ÜNAL" <arinc.unal@...nc9.com>:
> >> On 18.02.2023 15:18, Frank Wunderlich wrote:
> Can you also remove this from mt7530.c and do the test again? See if the 
> performance changes at all.
> 
>          /* Set core clock into 500Mhz */
>          core_write(priv, CORE_GSWPLL_GRP2,
>                     RG_GSWPLL_POSDIV_500M(1) |
>                     RG_GSWPLL_FBKDIV_500M(25));
> 

with these disabled i have a bit better performance (625 Mbits/sec instead of 600) and no retransmitts on first iperf3-run.

not yet tried any rgmii-delay option (have no idea which is the right one on which position), but yes, mostly it does not improve performance...it simply does work or does not work.

regards Frank