Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.38 as permitted sender) client-ip=23.128.96.38;
Date:   Thu, 2 Nov 2023 13:39:00 +0100
From:   Andrew Lunn <andrew@lunn.ch>
To:     =?iso-8859-1?Q?Ram=F3n?= Nordin Rodriguez 
        <ramon.nordin.rodriguez@ferroamp.se>
Cc:     Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>,
        davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
        pabeni@redhat.com, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
        corbet@lwn.net, steen.hegelund@microchip.com,
        rdunlap@infradead.org, horms@kernel.org, casper.casan@gmail.com,
        netdev@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
        horatiu.vultur@microchip.com, Woojung.Huh@microchip.com,
        Nicolas.Ferre@microchip.com, UNGLinuxDriver@microchip.com,
        Thorsten.Kummermehr@microchip.com
Subject: Re: [PATCH net-next v2 8/9] microchip: lan865x: add driver support
 for Microchip's LAN865X MACPHY
Message-ID: <f95b42ef-b7e0-44dc-b7c8-9353e9edc2df@lunn.ch>
References: <20231023154649.45931-1-Parthiban.Veerasooran@microchip.com>
 <20231023154649.45931-9-Parthiban.Veerasooran@microchip.com>
 <ZUOUGf-PMGo8z1s-@debian>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <ZUOUGf-PMGo8z1s-@debian>
Precedence: bulk

> 	spe1: ethernet@1{
> 		compatible = "microchip,lan865x";
> 		reg = <1>;
> 		interrupt-parent = <&gpio5>;
> 		interrupts = <0 IRQ_TYPE_EDGE_FALLING>;
> 		spi-max-frequency = <50000000>;

That is a pretty high frequency. It is actually running at that speed?

Have you tried lower speed?

> 		oa-tc6{
> 			#address-cells = <1>;
> 			#size-cells = <0>;
> 			oa-cps = <32>;
> 			oa-prote;
> 			oa-dprac;
> 		};
> 	};
> };
> 
> With this setup I'm getting a maximum throughput of about 90kB/s.
> If I increase the chunk size / oa-cps to 64 I get a might higher
> throughput ~900kB/s, but after 0-2s I get dump below (or similar).

Is this tcp traffic? Lost packets will have a big impact. You might
want to look at the link peer with tcpdump and look for retries. Also,
look if there are frames with bad checksums.

     Andrew