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Message-ID: <20250901100639.234ba07b.xunil@tahomasoft.com>
Date: Mon, 1 Sep 2025 10:06:39 -0400
From: Erik Beck <xunil@...omasoft.com>
To: Chukun Pan <amadeus@....edu.cn>
Cc: conor+dt@...nel.org, devicetree@...r.kernel.org, heiko@...ech.de,
krzk+dt@...nel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org, Andrew
Lunn <andrew@...n.ch>
Subject: Re: [PATCH 3/4] arm64: dts: rockchip: Add HINLINK H68K
On Mon, 1 Sep 2025 06:24:37 -0400
Erik Beck <xunil@...omasoft.com> wrote:
> On Mon, 1 Sep 2025 15:00:08 +0800
> Chukun Pan <amadeus@....edu.cn> wrote:
>
> > Hi,
> >
> > > Please change phy-mode here to "rgmii". This change will yield an
> > > ethernet speed throughput change of a factor of 100+.
> >
> > > Same as above: Please change phy-mode here to "rgmii". This change
> > > will yield an ethernet speed throughput change of a factor of 100+.
> >
> > This doesn't make sense. When I first submitted it to coolsnowwolf/lede
> > in 2022, I used "rgmii-id" as the phy-mode, and it worked:
> > https://github.com/coolsnowwolf/lede/blob/master/target/linux/rockchip/files/arch/arm64/boot/dts/rockchip/rk3568-opc-h68k.dts#L24
> >
> > Are you experiencing issues with both eth0 and eth1 or just one of them?
> > Are you using the generic-rk3568 target for U-Boot?
> >
>
> Hi Chukun, thanks for your response.
>
> At Andrew Lunn's suggestion, I'm doing
> more granular and rigorous testing, now using iperf3. I'll post more details
> of results here after I retest a couple of scenarios.
>
> However, I will report now that so far, I'm getting better (faster) and more
> consistent results using iperf3.
>
> ~Erik
Below are my results.
In summary, the speeds in certain scenarios are closer than in others.
Pooling everything together, at the eyeball level, things look pretty similar
across using RGMII-ID and RGMII (no internal delay). If I were to run these
tests repeatedly, pool the results, and do a statistical comparison (probably
with a Kolmogorov-Smirnov (KS) test or similar), I doubt I could reject the
null hypothesis of no significant difference between the two sample
distributions.
So what I said earlier regarding rgmii vs rgmii-id DOES NOT hold up under
more rigorous and careful testing.
Thanks,
Erik
___________________________
Results with (gmac0 & gmac1) phy-mode = "rgmii-id", tx_rx_delay unspecified
(kernel on boot sets tx_delay = 0x30 and rx_delay = 0x10 itself, both gmacs)
eth0/wan
iperf3 -s -F VidTest-1.4Gb.mp4
{openwrt device is 192.168.2.241}
{desktop on openwrt WAN is 192.168.2.90}
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 192.168.2.241, port 44414
[ 5] local 192.168.2.90 port 5201 connected to 192.168.2.241 port 44422
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 112 MBytes 935 Mbits/sec
[ 5] 1.00-2.00 sec 112 MBytes 939 Mbits/sec
[ 5] 2.00-3.00 sec 112 MBytes 940 Mbits/sec
[ 5] 3.00-4.00 sec 112 MBytes 939 Mbits/sec
[ 5] 4.00-5.00 sec 112 MBytes 939 Mbits/sec
[ 5] 5.00-6.00 sec 112 MBytes 939 Mbits/sec
[ 5] 6.00-7.00 sec 112 MBytes 938 Mbits/sec
[ 5] 7.00-8.00 sec 112 MBytes 940 Mbits/sec
[ 5] 8.00-9.00 sec 112 MBytes 938 Mbits/sec
[ 5] 9.00-10.00 sec 112 MBytes 940 Mbits/sec
[ 5] 10.00-10.00 sec 384 KBytes 815 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
Sent 1.09 GByte / 1.09 GByte (100%) of VidTest-1.4Gb.mp4
[ 5] 0.00-10.00 sec 1.09 GBytes 939 Mbits/sec receiver
-----------------------------------------------------------
< Reverse >
iperf3 -s
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 192.168.2.241, port 45870
[ 5] local 192.168.2.90 port 5201 connected to 192.168.2.241 port 45886
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 114 MBytes 953 Mbits/sec 120 158 KBytes
[ 5] 1.00-2.00 sec 112 MBytes 935 Mbits/sec 143 141 KBytes
[ 5] 2.00-3.00 sec 110 MBytes 923 Mbits/sec 131 195 KBytes
[ 5] 3.00-4.00 sec 112 MBytes 939 Mbits/sec 142 167 KBytes
[ 5] 4.00-5.00 sec 112 MBytes 942 Mbits/sec 136 133 KBytes
[ 5] 5.00-6.00 sec 111 MBytes 929 Mbits/sec 119 175 KBytes
[ 5] 6.00-7.00 sec 111 MBytes 932 Mbits/sec 126 115 KBytes
[ 5] 7.00-8.00 sec 112 MBytes 943 Mbits/sec 150 113 KBytes
[ 5] 8.00-9.00 sec 105 MBytes 884 Mbits/sec 28 110 KBytes
[ 5] 9.00-10.00 sec 112 MBytes 938 Mbits/sec 140 160 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 1.08 GBytes 932 Mbits/sec 1235 sender
eth1/lan
iperf3 -s -F VidTest-1.4Gb.mp4
-----------------------------------------------------------
{openwrt device is 192.168.1.1}
{Laptop attached to openwrt is 192.168.1.134}
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 192.168.1.1, port 53876
[ 5] local 192.168.1.134 port 5201 connected to 192.168.1.1 port 53890
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 31.9 MBytes 267 Mbits/sec
[ 5] 1.00-2.00 sec 32.5 MBytes 273 Mbits/sec
[ 5] 2.00-3.00 sec 33.6 MBytes 282 Mbits/sec
[ 5] 3.00-4.00 sec 29.2 MBytes 245 Mbits/sec
[ 5] 4.00-5.00 sec 33.8 MBytes 283 Mbits/sec
[ 5] 5.00-6.00 sec 32.6 MBytes 274 Mbits/sec
[ 5] 6.00-7.00 sec 34.1 MBytes 286 Mbits/sec
[ 5] 7.00-8.00 sec 35.0 MBytes 294 Mbits/sec
[ 5] 8.00-9.00 sec 33.6 MBytes 282 Mbits/sec
[ 5] 9.00-10.00 sec 32.8 MBytes 275 Mbits/sec
[ 5] 10.00-10.00 sec 128 KBytes 872 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
Sent 329 MByte / 329 MByte (100%) of VidTest-1.4Gb.mp4
[ 5] 0.00-10.00 sec 329 MBytes 276 Mbits/sec receiver
-----------------------------------------------------------
< reverse >
iperf3 -c 192.168.1.1
Connecting to host 192.168.1.1, port 5201
[ 5] local 192.168.1.134 port 60508 connected to 192.168.1.1 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 113 MBytes 948 Mbits/sec 0 393 KBytes
[ 5] 1.00-2.00 sec 111 MBytes 931 Mbits/sec 0 411 KBytes
[ 5] 2.00-3.00 sec 112 MBytes 935 Mbits/sec 0 433 KBytes
[ 5] 3.00-4.00 sec 111 MBytes 933 Mbits/sec 0 433 KBytes
[ 5] 4.00-5.00 sec 111 MBytes 934 Mbits/sec 0 433 KBytes
[ 5] 5.00-6.00 sec 111 MBytes 932 Mbits/sec 0 433 KBytes
[ 5] 6.00-7.00 sec 111 MBytes 930 Mbits/sec 0 433 KBytes
[ 5] 7.00-8.00 sec 111 MBytes 934 Mbits/sec 0 433 KBytes
[ 5] 8.00-9.00 sec 111 MBytes 932 Mbits/sec 0 433 KBytes
[ 5] 9.00-10.00 sec 113 MBytes 944 Mbits/sec 0 573 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 1.09 GBytes 936 Mbits/sec 0 sender
[ 5] 0.00-10.00 sec 1.09 GBytes 933 Mbits/sec receiver
Throughput (wan (eth0) -> lan (eth1) -> laptop)
Desktop <------> Laptop via Openwrt
192.168.2.90 192.168.1.134
iperf3 -c 192.168.2.90
Connecting to host 192.168.2.90, port 5201
[ 5] local 192.168.1.134 port 54694 connected to 192.168.2.90 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 106 MBytes 889 Mbits/sec 0 461 KBytes
[ 5] 1.00-2.00 sec 111 MBytes 933 Mbits/sec 0 461 KBytes
[ 5] 2.00-3.00 sec 111 MBytes 933 Mbits/sec 0 461 KBytes
[ 5] 3.00-4.00 sec 111 MBytes 934 Mbits/sec 0 461 KBytes
[ 5] 4.00-5.00 sec 111 MBytes 932 Mbits/sec 0 461 KBytes
[ 5] 5.00-6.00 sec 111 MBytes 933 Mbits/sec 0 461 KBytes
[ 5] 6.00-7.00 sec 111 MBytes 931 Mbits/sec 0 503 KBytes
[ 5] 7.00-8.00 sec 112 MBytes 938 Mbits/sec 0 503 KBytes
[ 5] 8.00-9.00 sec 111 MBytes 931 Mbits/sec 0 503 KBytes
[ 5] 9.00-10.00 sec 111 MBytes 933 Mbits/sec 0 503 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 1.08 GBytes 929 Mbits/sec 0 sender
[ 5] 0.00-10.00 sec 1.08 GBytes 927 Mbits/sec receive
< Reverse >
iperf3 -c 192.168.2.90
Connecting to host 192.168.2.90, port 5201
[ 5] local 192.168.1.134 port 54694 connected to 192.168.2.90 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 106 MBytes 889 Mbits/sec 0 461 KBytes
[ 5] 1.00-2.00 sec 111 MBytes 933 Mbits/sec 0 461 KBytes
[ 5] 2.00-3.00 sec 111 MBytes 933 Mbits/sec 0 461 KBytes
[ 5] 3.00-4.00 sec 111 MBytes 934 Mbits/sec 0 461 KBytes
[ 5] 4.00-5.00 sec 111 MBytes 932 Mbits/sec 0 461 KBytes
[ 5] 5.00-6.00 sec 111 MBytes 933 Mbits/sec 0 461 KBytes
[ 5] 6.00-7.00 sec 111 MBytes 931 Mbits/sec 0 503 KBytes
[ 5] 7.00-8.00 sec 112 MBytes 938 Mbits/sec 0 503 KBytes
[ 5] 8.00-9.00 sec 111 MBytes 931 Mbits/sec 0 503 KBytes
[ 5] 9.00-10.00 sec 111 MBytes 933 Mbits/sec 0 503 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 1.08 GBytes 929 Mbits/sec 0 sender
[ 5] 0.00-10.00 sec 1.08 GBytes 927 Mbits/sec receive
---------
Results with (gmac0 & gmac1) phy-mode = "rgmii", tx_rx_delay unspecified
(kernel on boot sets tx_delay = 0x30 and rx_delay = 0x10 itself, both gmacs)
eth0/wan
iperf3 -s -F VidTest-1.4Gb.mp4
{openwrt device is 192.168.2.241}
{desktop on openwrt WAN is 192.168.2.90}
iperf3 -s -F VidTest-1.4Gb.mp4
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 192.168.2.241, port 35070
[ 5] local 192.168.2.90 port 5201 connected to 192.168.2.241 port 35084
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 112 MBytes 936 Mbits/sec
[ 5] 1.00-2.00 sec 112 MBytes 939 Mbits/sec
[ 5] 2.00-3.00 sec 112 MBytes 938 Mbits/sec
[ 5] 3.00-4.00 sec 112 MBytes 939 Mbits/sec
[ 5] 4.00-5.00 sec 112 MBytes 939 Mbits/sec
[ 5] 5.00-6.00 sec 112 MBytes 940 Mbits/sec
[ 5] 6.00-7.00 sec 112 MBytes 938 Mbits/sec
[ 5] 7.00-8.00 sec 112 MBytes 940 Mbits/sec
[ 5] 8.00-9.00 sec 112 MBytes 939 Mbits/sec
[ 5] 9.00-10.00 sec 112 MBytes 939 Mbits/sec
[ 5] 10.00-10.00 sec 384 KBytes 869 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
Sent 1.09 GByte / 1.09 GByte (100%) of VidTest-1.4Gb.mp4
[ 5] 0.00-10.00 sec 1.09 GBytes 939 Mbits/sec receiver
-----------------------------------------------------------
<reverse>
Accepted connection from 192.168.2.241, port 51650
[ 5] local 192.168.2.90 port 5201 connected to 192.168.2.241 port 51660
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 114 MBytes 953 Mbits/sec 168 209 KBytes
[ 5] 1.00-2.00 sec 112 MBytes 938 Mbits/sec 224 148 KBytes
[ 5] 2.00-3.00 sec 112 MBytes 940 Mbits/sec 196 158 KBytes
[ 5] 3.00-4.00 sec 112 MBytes 943 Mbits/sec 196 180 KBytes
[ 5] 4.00-5.00 sec 112 MBytes 937 Mbits/sec 196 187 KBytes
[ 5] 5.00-6.00 sec 112 MBytes 940 Mbits/sec 196 195 KBytes
[ 5] 6.00-7.00 sec 112 MBytes 937 Mbits/sec 196 204 KBytes
[ 5] 7.00-8.00 sec 112 MBytes 940 Mbits/sec 224 136 KBytes
[ 5] 8.00-9.00 sec 112 MBytes 940 Mbits/sec 196 158 KBytes
[ 5] 9.00-10.00 sec 110 MBytes 922 Mbits/sec 196 188 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 1.09 GBytes 939 Mbits/sec 1988 sender
Sent 1.09 GByte / 1.09 GByte (100%) of VidTest-1.4Gb.mp4
-----------------------------------------------------------
eth1/lan
{192.168.1.1 is Openwrt device}
{192.168.1.134 is laptop directly attached to Openwrt}
iperf3 -s -F VidTest-1.4Gb.mp4
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 192.168.1.1, port 40866
[ 5] local 192.168.1.134 port 5201 connected to 192.168.1.1 port 40868
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 67.4 MBytes 565 Mbits/sec
[ 5] 1.00-2.00 sec 69.4 MBytes 582 Mbits/sec
[ 5] 2.00-3.00 sec 65.9 MBytes 553 Mbits/sec
[ 5] 3.00-4.00 sec 66.5 MBytes 558 Mbits/sec
[ 5] 4.00-5.00 sec 70.2 MBytes 589 Mbits/sec
[ 5] 5.00-6.00 sec 52.5 MBytes 440 Mbits/sec
[ 5] 6.00-7.00 sec 67.2 MBytes 564 Mbits/sec
[ 5] 7.00-8.00 sec 70.2 MBytes 589 Mbits/sec
[ 5] 8.00-9.00 sec 57.9 MBytes 486 Mbits/sec
[ 5] 9.00-10.00 sec 66.9 MBytes 561 Mbits/sec
[ 5] 10.00-10.00 sec 128 KBytes 909 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
Sent 654 MByte / 654 MByte (100%) of VidTest-1.4Gb.mp4
[ 5] 0.00-10.00 sec 654 MBytes 549 Mbits/sec receiver
< reverse >
iperf3 -c 192.168.1.134 --reverse
Connecting to host 192.168.1.134, port 5201
Reverse mode, remote host 192.168.1.134 is sending
[ 5] local 192.168.1.1 port 58380 connected to 192.168.1.134 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 104 MBytes 870 Mbits/sec
[ 5] 1.00-2.00 sec 98.5 MBytes 826 Mbits/sec
[ 5] 2.00-3.00 sec 89.9 MBytes 754 Mbits/sec
[ 5] 3.00-4.00 sec 87.4 MBytes 733 Mbits/sec
[ 5] 4.00-5.00 sec 97.0 MBytes 814 Mbits/sec
[ 5] 5.00-6.00 sec 95.5 MBytes 801 Mbits/sec
[ 5] 6.00-7.00 sec 82.1 MBytes 689 Mbits/sec
[ 5] 7.00-8.00 sec 0.00 Bytes 0.00 bits/sec
[ 5] 8.00-9.00 sec 0.00 Bytes 0.00 bits/sec
[ 5] 9.00-10.00 sec 0.00 Bytes 0.00 bits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 654 MBytes 549 Mbits/sec 235 sender
[ 5] 0.00-10.00 sec 654 MBytes 549 Mbits/sec receiver
Throughput (wan (eth0) -> lan (eth1) -> laptop)
Desktop <------> Laptop via Openwrt
192.168.2.90 192.168.1.134
iperf3 -c 192.168.2.90
Connecting to host 192.168.2.90, port 5201
[ 5] local 192.168.1.134 port 44380 connected to 192.168.2.90 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 91.8 MBytes 769 Mbits/sec 15 76.4 KBytes
[ 5] 1.00-2.00 sec 99.5 MBytes 835 Mbits/sec 11 102 KBytes
[ 5] 2.00-3.00 sec 98.8 MBytes 828 Mbits/sec 12 167 KBytes
[ 5] 3.00-4.00 sec 95.4 MBytes 800 Mbits/sec 17 126 KBytes
[ 5] 4.00-5.00 sec 106 MBytes 890 Mbits/sec 9 117 KBytes
[ 5] 5.00-6.00 sec 96.5 MBytes 810 Mbits/sec 15 123 KBytes
[ 5] 6.00-7.00 sec 99.6 MBytes 835 Mbits/sec 13 144 KBytes
[ 5] 7.00-8.00 sec 100 MBytes 842 Mbits/sec 15 58.0 KBytes
[ 5] 8.00-9.00 sec 96.1 MBytes 806 Mbits/sec 15 115 KBytes
[ 5] 9.00-10.00 sec 95.4 MBytes 800 Mbits/sec 14 126 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 980 MBytes 822 Mbits/sec 136 sender
[ 5] 0.00-10.00 sec 979 MBytes 821 Mbits/sec receiver
< reverse >
perf3 -c 192.168.2.90 --reverse
Connecting to host 192.168.2.90, port 5201
Reverse mode, remote host 192.168.2.90 is sending
[ 5] local 192.168.1.134 port 51148 connected to 192.168.2.90 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 40.6 MBytes 340 Mbits/sec
[ 5] 1.00-2.00 sec 54.9 MBytes 460 Mbits/sec
[ 5] 2.00-3.00 sec 49.6 MBytes 416 Mbits/sec
[ 5] 3.00-4.00 sec 47.4 MBytes 397 Mbits/sec
[ 5] 4.00-5.00 sec 45.9 MBytes 385 Mbits/sec
[ 5] 5.00-6.00 sec 52.8 MBytes 443 Mbits/sec
[ 5] 6.00-7.00 sec 45.1 MBytes 379 Mbits/sec
[ 5] 7.00-8.00 sec 46.1 MBytes 387 Mbits/sec
[ 5] 8.00-9.00 sec 42.8 MBytes 359 Mbits/sec
[ 5] 9.00-10.00 sec 40.6 MBytes 341 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 467 MBytes 392 Mbits/sec 403 sender
[ 5] 0.00-10.00 sec 466 MBytes 391 Mbits/sec receiver
____________________________________
>
> > I can't reproduce your problem in my test.
> >
> > eth0/gmac1 (as lan):
> > root@...nWrt:~# iperf3 -c 192.168.1.100
> > Connecting to host 192.168.1.100, port 5201
> > [ ID] Interval Transfer Bitrate Retr
> > [ 5] 0.00-10.00 sec 1.10 GBytes 942 Mbits/sec 29
> > sender [ 5] 0.00-10.04 sec 1.10 GBytes 936 Mbits/sec
> > receiver
> >
> > root@...nWrt:~# iperf3 -c 192.168.1.100 -R
> > Connecting to host 192.168.1.100, port 5201
> > Reverse mode, remote host 192.168.1.100 is sending
> > [ ID] Interval Transfer Bitrate Retr
> > [ 5] 0.00-10.04 sec 1.10 GBytes 939 Mbits/sec 1
> > sender [ 5] 0.00-10.00 sec 1.10 GBytes 941 Mbits/sec
> > receiver
> >
> > eth1/gmac0 (as wan):
> > root@...nWrt:~# iperf3 -c 192.168.0.2 -P 4
> > Connecting to host 192.168.0.2, port 5201
> > [ ID] Interval Transfer Bitrate Retr
> > [SUM] 0.00-10.00 sec 1.10 GBytes 945 Mbits/sec 1191
> > sender [SUM] 0.00-10.05 sec 1.09 GBytes 935 Mbits/sec
> > receiver
> >
> > root@...nWrt:~# iperf3 -c 192.168.0.2 -R
> > Connecting to host 192.168.0.2, port 5201
> > Reverse mode, remote host 192.168.0.2 is sending
> > [ ID] Interval Transfer Bitrate Retr
> > [ 5] 0.00-10.06 sec 1.10 GBytes 939 Mbits/sec 6
> > sender [ 5] 0.00-10.00 sec 1.10 GBytes 941 Mbits/sec
> > receiver
> >
> > --
> > 2.25.1
> >
> >
> >
> > _______________________________________________
> > Linux-rockchip mailing list
> > Linux-rockchip@...ts.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-rockchip
>
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