Public bug reported:
Hi,
i run some network-tests (iperf3) and noticed massive retransmitts in
ubuntu 20.4 with kernel 5.4.0-29. I'm using module r8169 for network-
adapter
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
if i boot my ubuntu 18.4 and did same iperf-test (same hardware, same
network configuration, other client is not rebooted) i have not these
retransmitts.
root@bpi-r2:~# iperf3 -c 192.168.0.21
Connecting to host 192.168.0.21, port 5201
[ 5] local 192.168.0.11 port 35702 connected to 192.168.0.21 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 14.2 MBytes 119 Mbits/sec 337 14.1 KBytes
[ 5] 1.00-2.00 sec 14.9 MBytes 125 Mbits/sec 331 14.1 KBytes
[ 5] 2.00-3.00 sec 15.1 MBytes 126 Mbits/sec 296 19.8 KBytes
[ 5] 3.00-4.00 sec 14.7 MBytes 124 Mbits/sec 314 14.1 KBytes
[ 5] 4.00-5.00 sec 12.8 MBytes 107 Mbits/sec 259 14.1 KBytes
[ 5] 5.00-6.01 sec 67.4 MBytes 560 Mbits/sec 137 362 KBytes
[ 5] 6.01-7.00 sec 111 MBytes 940 Mbits/sec 0 366 KBytes
[ 5] 7.00-8.00 sec 112 MBytes 941 Mbits/sec 0 409 KBytes
[ 5] 8.00-9.00 sec 112 MBytes 940 Mbits/sec 0 421 KBytes
[ 5] 9.00-10.00 sec 112 MBytes 936 Mbits/sec 0 426 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 586 MBytes 491 Mbits/sec 1674 sender
[ 5] 0.00-10.01 sec 585 MBytes 491 Mbits/sec receiver
iperf Done.
2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
group default qlen 1000
link/ether e4:b9:7a:f7:c4:8b brd ff:ff:ff:ff:ff:ff
inet 192.168.0.21/24 brd 192.168.0.255 scope global dynamic noprefixroute
enp3s0
valid_lft 171856sec preferred_lft 171856sec
inet6 fe80::781a:829f:5030:ad6a/64 scope link noprefixroute
valid_lft forever preferred_lft forever
$ ethtool -S enp3s0
NIC statistics:
tx_packets: 571053
rx_packets: 1184934
tx_errors: 0
rx_errors: 0
rx_missed: 1919 <<<<<<<<<<<<<<<<<<<<<<<<<<<
align_errors: 0
tx_single_collisions: 0
tx_multi_collisions: 0
unicast: 1184926
broadcast: 6
multicast: 2
tx_aborted: 0
tx_underrun: 0
2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
mode DEFAULT group default qlen 1000
link/ether e4:b9:7a:f7:c4:8b brd ff:ff:ff:ff:ff:ff
RX: bytes packets errors dropped overrun mcast
1785166133 1184970 0 0 0 2
TX: bytes packets errors dropped carrier collsns
39395440 570500 0 0 0 0
on the other side i see dropped packets, maybe flowcontrol-related?
ethtool reports "Link partner advertised pause frame use: Symmetric" but
maybe flowcontrol is not working...
also driver reports flowcontrol is enabled...
$ dmesg | grep r8169
[ 0.939358] libphy: r8169: probed
[ 0.939491] r8169 0000:03:00.0 eth0: RTL8168h/8111h, e4:b9:7a:f7:c4:8b, XID
541, IRQ 128
[ 0.939492] r8169 0000:03:00.0 eth0: jumbo features [frames: 9200 bytes, tx
checksumming: ko]
[ 0.986853] r8169 0000:03:00.0 enp3s0: renamed from eth0
[ 3.478981] Generic FE-GE Realtek PHY r8169-300:00: attached PHY driver
[Generic FE-GE Realtek PHY] (mii_bus:phy_addr=r8169-300:00, irq=IGNORE)
[ 3.591124] r8169 0000:03:00.0 enp3s0: Link is Down
[ 7.171198] r8169 0000:03:00.0 enp3s0: Link is Up - 1Gbps/Full - flow
control rx/tx
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-29-generic 5.4.0-29.33
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: frank 1427 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: GNOME-Flashback:GNOME
Date: Fri May 22 06:49:34 2020
InstallationDate: Installed on 2020-04-27 (24 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: Dell Inc. G5 5590
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic
root=UUID=7c9113b7-ca65-4c46-9435-f5d2b73bab72 ro quiet
RelatedPackageVersions:
linux-restricted-modules-5.4.0-29-generic N/A
linux-backports-modules-5.4.0-29-generic N/A
linux-firmware 1.187
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/07/2020
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.12.0
dmi.board.name: 0KW84T
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.12.0:bd02/07/2020:svnDellInc.:pnG55590:pvr:rvnDellInc.:rn0KW84T:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: GSeries
dmi.product.name: G5 5590
dmi.product.sku: 08EA
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1880076
Title:
ubuntu 20.4 - retransmitts with r8169
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