From: Emiliano Ingrassia <ingrassia@epigenesys.com>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Simon Huelck <simonmail@gmx.de>
Cc: Gpeppe.cavallaro@st.com, alexandre.torgue@st.com,
linux-amlogic@lists.infradead.org, netdev@vger.kernel.org
Subject: Re: stmmac / meson8b-dwmac
Date: Wed, 6 Feb 2019 11:36:45 +0100 [thread overview]
Message-ID: <20190206103645.GA2482@ingrassia.epigenesys.com> (raw)
In-Reply-To: <CAFBinCAkXN42piiYsc_Qmuqv0w4dbK86gq10AbZyrB-zKuh9hg@mail.gmail.com>
Hi Martin, Hi Simon,
On Mon, Feb 04, 2019 at 03:34:41PM +0100, Martin Blumenstingl wrote:
> On Thu, Jan 17, 2019 at 10:23 PM Simon Huelck <simonmail@gmx.de> wrote:
> [...]
> > >> I got problems with my ODROID c2 running on 4.19.16 ( and some releases
> > >> earlier ). the stmmac / dwmac driver doesnt provide the 800M/900M
> > >> performance that i was used to earlier.
> > >>
Simon, did you ever reach 1 Gbps full duplex speed?
If yes, what was the kernel version did you use?
> > >>
> > >> Now im stuck near 550M/600M in the same environment. but what really
> > >> confuses me that duplex does hurt even more.
> > > interesting that you see this on the Odroid-C2 as well.
> > > previously I have only observed it on an Odroid-C1
> > >
> > >> PC --- VLAN3 --> switch --VLAN3--> ODROID
> > >>
> > >> NAS <-- VLAN1 -- switch <-- VLAN1-- ODROID
> > >>
> > >>
> > >> this means when im doing a iperf from PC to NAS, that my ODROID has load
> > >> on RX/TX same time (duplex). this shouldnt be an issue , all is 1GBits
> > >> FD. And in the past that wasnt an issue.
> +Cc Emiliano who has seen a similar duplex issue on his Odroid-C1: [0]
> (please note that all kernels prior to v5.1 with the pending patches
> from [1] applied are only receiving data on RXD0 and RXD1 but not on
> RXD2 and RXD3)
>
> Emiliano, can you confirm the duplex issue observed by Simon is
> similar to the one you see on your Odroid-C1?
>
It could be but, if I understand correctly, Simon is limited in
speed also in half duplex transmission (~550/600 Mbps), while we can
reach at least 900 Mbps.
> > >>
> > >>
> > >> Now what happens:
> > >>
> > >> - benchmark between PC - ODROID is roughly 550M
> > >>
> > >> - benchmark between NAS - ODROID is roughly 550M
> > >>
> > >> - benchmark between PC - NAS is only around 300M
> > >>
> > >>
> > >> and like i said i was easliy able to hit 800 or even 900M to my NAS
> > >> earlier. I applied some .dtb fixes for interrupt levels for the
> > >> meson-gx.dtsi and meson-gxbb-odroid-c2.dtb, which will be mainlined ,
> > >> but the effect stayed identical.
> > > good that you have the interrupt patches already applied
> > > I believe it don't fix any performance issues - it's a fix for the
> > > Ethernet controller seemingly getting "stuck" (not processing data
> > > anymore). however, that already rules out one potential issue
> > >
> > >> are you aware of this problem ? Earlier kernel versions were all
> > >> perfectly fine and i stepped ( self compiled) kernel through all major
> > >> releases since odroid c2 was mainlined.
> Guiseppe, Alexandre: what kind of data do you need from us if we see
> the speeds drop (in both directions) when we send and receive at the
> same time?
>
> [...]
> > the problem is that i dont have these kernel sources anymore :-(. but i
> > can provide some testing and numbers. maybe i dig if i got these kernel
> > configs somewhere around but i did not change much during migrating
> do you remember the kernel version where it worked fine?
>
> > im using a zyxel gs1900-8 switch and a qnap ts231p , and as i said i
> > didnt change my setup. i was able to hit 100MByte/s from my NAS , so
> > close to the benchmarks of 900MBit/s
> I typically only do small transfers or I have traffic only in one direction.
> thus it's likely that I missed this in my own tests
>
>
> Regards
> Martin
>
>
> [0] http://lists.infradead.org/pipermail/linux-amlogic/2018-December/009679.html
> [1] https://patchwork.kernel.org/cover/10744905/
Regards,
Emiliano
next prev parent reply other threads:[~2019-02-06 10:36 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <a38e643c-ed9f-c306-cc95-84f70ebc1f10@gmx.de>
[not found] ` <CAFBinCDebPOsmrhSXecx48nGWHh7g_OGPbr1Y0M+n_v9Ht91ew@mail.gmail.com>
2019-01-17 21:23 ` stmmac / meson8b-dwmac Simon Huelck
2019-02-04 14:34 ` Martin Blumenstingl
2019-02-06 10:36 ` Emiliano Ingrassia [this message]
2019-02-06 18:04 ` Simon Huelck
2019-02-06 21:21 ` Simon Huelck
2019-02-07 19:30 ` Simon Huelck
2019-02-09 1:09 ` Martin Blumenstingl
2019-02-11 13:44 ` Jose Abreu
2019-02-14 7:21 ` Simon Huelck
2019-02-17 14:48 ` Martin Blumenstingl
2019-02-17 19:13 ` Simon Huelck
2019-02-18 8:42 ` Jose Abreu
2019-02-18 8:45 ` Jose Abreu
2019-02-18 12:33 ` Simon Huelck
2019-02-18 12:41 ` Jose Abreu
2019-02-18 13:02 ` Jose Abreu
2019-02-18 15:29 ` Simon Huelck
2019-02-18 15:31 ` Jose Abreu
2019-02-18 15:53 ` Simon Huelck
2019-02-18 16:26 ` Jose Abreu
2019-02-18 16:40 ` Simon Huelck
2019-02-18 16:43 ` Jose Abreu
2019-02-18 16:51 ` Simon Huelck
2019-02-18 17:05 ` Jose Abreu
2019-02-18 18:05 ` Simon Huelck
2019-02-19 8:47 ` Jose Abreu
2019-02-19 19:41 ` Simon Huelck
2019-02-21 14:21 ` Jerome Brunet
2019-02-21 17:27 ` Simon Huelck
2019-02-21 17:46 ` Jerome Brunet
2019-02-21 19:34 ` Simon Huelck
2019-02-22 17:21 ` Anand Moon
2019-02-24 15:00 ` Simon Huelck
2019-02-24 15:02 ` Simon Huelck
2019-02-24 19:42 ` Sebastian Gottschall
2019-02-24 20:34 ` Simon Huelck
2019-02-27 11:09 ` Jose Abreu
2019-02-27 19:02 ` Simon Huelck
2019-03-01 9:23 ` Jose Abreu
2019-03-05 9:55 ` Simon Huelck
2019-03-06 11:35 ` Simon Huelck
2019-03-06 11:45 ` Simon Huelck
2019-05-11 14:53 ` Simon Huelck
2019-05-13 9:07 ` Jose Abreu
2019-05-22 12:48 ` Simon Huelck
2019-05-22 14:02 ` Neil Armstrong
2019-02-27 21:03 ` Simon Huelck
2019-02-18 17:05 ` Simon Huelck
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