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Message-ID: <74r22ns-61qo-rqn3-n41-9or5n96qq89@vanv.qr>
Date: Sat, 14 Aug 2021 22:16:12 +0200 (CEST)
From: Jan Engelhardt <jengelh@...i.de>
To: Bruce Allan <bruce.w.allan@...el.com>,
David Ertman <david.m.ertman@...el.com>
cc: netdev@...r.kernel.org, kuba@...nel.org
Subject: e1000e: abysmal performance of 8086:15fb rev 20 Ethernet
Greetings.
I have here the following machine:
Fujitsu Lifebook U7311 laptop (2021)
product code VFY:U7311MF5AMDE
Family 6 Model 140 Intel "11th gen" Core i5-1135G7
i219-LM rev 20 Ethernet chip
and this TGL Eternet performs absolutely miserably, achieving only
like 1/100th of the supposed RX speed most of the time. TX is fine. A
sister laptop, the 3 year older (but arguably newer in all other
numbers?!),
Lifebook U728 (2018)
Family 6 Model *142* Intel "8th gen" Core i5-8250U
i219-LM rev *21* Ethernet chip
does not exhibit any Ethernet-related RX/TX speed bugs of this kind.
The problems occur on current 5.14-rc kernels and earlier versions.
There is no known-good version of Linux to speak of.
== lspci
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (13)
I219-LM (rev 20)
00:1f.6 0200: 8086:15fb (rev 20)
Subsystem: 1e26:001a
== freebsd-13-release live cd
#pciconf -l
none9@...0:0:31:6: class=0x020000 rev=0x20 ...
[doesn't even have a driver to test]
== dmesg
[ 0.000000] microcode: microcode updated early to revision 0x88, date = 2021-03-31
[ 0.000000] Linux version 5.14.0-rc5-1-default+ (root@...alhost.localdomain) (gcc (SUSE Linux) 11.1.1 20210721 [revision 076930b9690ac3564638636f6b13bbb6bc608aea], GNU ld (GNU Binutils; openSUSE Tumbleweed) 2.36.1.20210326-4) #3 SMP Sat Aug 14 19:29:53 CEST 2021
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.14.0-rc5-1-default+ root=UUID=dc0a25dc-12b4-4b52-9d4e-05fb5c07d3dd splash=silent mitigations=auto quiet
[ 6.559429] e1000e: Intel(R) PRO/1000 Network Driver
[ 6.559431] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 6.560073] e1000e 0000:00:1f.6: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
[ 6.800991] e1000e 0000:00:1f.6 0000:00:1f.6 (uninitialized): registered PHC clock
[ 6.876468] e1000e 0000:00:1f.6 eth0: (PCI Express:2.5GT/s:Width x1) ec:79:49:4a:8d:76
[ 6.876472] e1000e 0000:00:1f.6 eth0: Intel(R) PRO/1000 Network Connection
[ 6.876649] e1000e 0000:00:1f.6 eth0: MAC: 13, PHY: 12, PBA No: FFFFFF-0FF
[ 11.279159] e1000e 0000:00:1f.6 eth0: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
== ethtool
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Auto-negotiation: on
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
MDI-X: on (auto)
Supports Wake-on: pumbg
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
Tried `ethtool -K eth0 rx off tx off sg off tso off ufo off gso off gro off lro
off rxvlan off txvlan off ntuple off rxhash off` with no change in situation.
== Measurements
On the local Ethernet segment...
u7311# iperf3 -Rc fc00::5
Connecting to host fc00::5, port 5201
Reverse mode, remote host fc00::5 is sending
[ 5] local fc00::9 port 39154 connected to fc00::5 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 1.20 MBytes 10.0 Mbits/sec
[ 5] 1.00-2.00 sec 1.84 MBytes 15.4 Mbits/sec
[ 5] 2.00-3.00 sec 2.44 MBytes 20.5 Mbits/sec
[ 5] 3.00-4.00 sec 1.44 MBytes 12.1 Mbits/sec
[ 5] 4.00-5.00 sec 417 KBytes 3.41 Mbits/sec
[ 5] 5.00-6.00 sec 358 KBytes 2.94 Mbits/sec
[ 5] 6.00-7.00 sec 1.46 MBytes 12.2 Mbits/sec
[ 5] 7.00-8.00 sec 1.51 MBytes 12.7 Mbits/sec
[ 5] 8.00-9.00 sec 431 KBytes 3.53 Mbits/sec
[ 5] 9.00-10.00 sec 654 KBytes 5.36 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 11.9 MBytes 9.98 Mbits/sec 959 sender
[ 5] 0.00-10.00 sec 11.7 MBytes 9.83 Mbits/sec receiver
u7311# iperf3 -c fc00::5
Connecting to host fc00::5, port 5201
[ 5] local fc00::9 port 39158 connected to fc00::5 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 110 MBytes 924 Mbits/sec 0 370 KBytes
[ 5] 1.00-2.00 sec 110 MBytes 922 Mbits/sec 0 389 KBytes
[ 5] 2.00-3.00 sec 110 MBytes 924 Mbits/sec 0 389 KBytes
[ 5] 3.00-4.00 sec 110 MBytes 922 Mbits/sec 0 389 KBytes
With internet, it's even worse.
u7311# wget -O /dev/zero inai.de/files/large
Location: https://inai.de/files/large [following]
--2021-08-14 21:02:49-- https://inai.de/files/large
Connecting to inai.de (inai.de)|2a01:4f8:10b:45d8::f5|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1099511627776 (1.0T)
Saving to: ‘/dev/zero’
/dev/zero 0%[..] 152.00K 198KB/s
u7311# iperf3 -R -c inai.de
Connecting to host inai.de, port 5201
Reverse mode, remote host inai.de is sending
[ 5] local 2a02:8108:96c0:1a00::6981 port 46556 connected to 2a01:4f8:10b:45d8::f5 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 107 KBytes 879 Kbits/sec
[ 5] 1.00-2.00 sec 107 KBytes 880 Kbits/sec
[ 5] 2.00-3.00 sec 102 KBytes 834 Kbits/sec
[ 5] 3.00-4.00 sec 90.6 KBytes 743 Kbits/sec
[ 5] 4.00-5.00 sec 92.0 KBytes 754 Kbits/sec
[ 5] 5.00-6.00 sec 89.2 KBytes 731 Kbits/sec
{iptraf-ng is saying: ~1166 kbps incoming, 73 kbps outgoing}
u7311# iperf3 -c inai.de
Connecting to host inai.de, port 5201
[ 5] local 2a02:8108:96c0:1a00::6981 port 46560 connected to 2a01:4f8:10b:45d8::f5 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 7.72 MBytes 64.8 Mbits/sec 1 492 KBytes
[ 5] 1.00-2.00 sec 5.21 MBytes 43.7 Mbits/sec 7 135 KBytes
[ 5] 2.00-3.00 sec 5.21 MBytes 43.7 Mbits/sec 0 162 KBytes
...
{iptraf-ng is saying: ~1067 kbps incoming, 53464 kbps outgoing}
The available home internet connection is capped at 920 down/50 up
Mbit, so numbers for TX are good, but RX still sucks. With parallel
downloading, the chip lets about 6-10 Mbit through.
u7311# aria2c --file-allocation=none -x 10 -j 10 https://inai.de/files/large
08/14 21:11:58 [NOTICE] Downloading 1 item(s)
[#8b97d9 11MiB/1,024GiB(0%) CN:5 DL:604KiB ETA:493h10m48s]
Sometimes I get this freak uprise in rates after a while.
# iperf3 -Rc 192.168.0.73
Connecting to host 192.168.0.73, port 5201
Reverse mode, remote host 192.168.0.73 is sending
[ 5] local 192.168.0.153 port 48716 connected to 192.168.0.73 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 350 KBytes 2.87 Mbits/sec
[ 5] 1.00-2.00 sec 321 KBytes 2.63 Mbits/sec
[ 5] 2.00-3.00 sec 619 KBytes 5.07 Mbits/sec
[ 5] 3.00-4.00 sec 59.7 MBytes 501 Mbits/sec
[ 5] 4.00-5.00 sec 111 MBytes 934 Mbits/sec
[ 5] 5.00-6.00 sec 111 MBytes 934 Mbits/sec
[ 5] 6.00-7.00 sec 111 MBytes 934 Mbits/sec
[ 5] 7.00-8.00 sec 111 MBytes 934 Mbits/sec
[ 5] 8.00-9.00 sec 111 MBytes 934 Mbits/sec
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