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Date: Sun, 17 Feb 2019 15:48:54 +0100
From: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To: Jose Abreu <jose.abreu@...opsys.com>
Cc: Simon Huelck <simonmail@....de>,
Emiliano Ingrassia <ingrassia@...genesys.com>,
Gpeppe.cavallaro@...com, alexandre.torgue@...com,
linux-amlogic@...ts.infradead.org, netdev@...r.kernel.org
Subject: Re: stmmac / meson8b-dwmac
Hello Jose,
On Mon, Feb 11, 2019 at 2:45 PM Jose Abreu <jose.abreu@...opsys.com> wrote:
>
> Hello,
>
> On 2/9/2019 1:09 AM, Martin Blumenstingl wrote:
> > (it's interesting that the sending direction has 445 retries)
>
> I saw this before and I think it was related with COE. Can you
> please disable all offloading and try again?
OK, details are:
(before doing anything)
# ethtool -k eth0
Features for eth0:
rx-checksumming: on
tx-checksumming: on
tx-checksum-ipv4: on
tx-checksum-ip-generic: off [fixed]
tx-checksum-ipv6: on
tx-checksum-fcoe-crc: off [fixed]
tx-checksum-sctp: off [fixed]
scatter-gather: on
tx-scatter-gather: on
tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: off
tx-tcp-segmentation: off [fixed]
tx-tcp-ecn-segmentation: off [fixed]
tx-tcp-mangleid-segmentation: off [fixed]
tx-tcp6-segmentation: off [fixed]
udp-fragmentation-offload: off
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off [fixed]
rx-vlan-offload: off [fixed]
tx-vlan-offload: off [fixed]
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: on [fixed]
rx-vlan-filter: off [fixed]
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-gre-csum-segmentation: off [fixed]
tx-ipxip4-segmentation: off [fixed]
tx-ipxip6-segmentation: off [fixed]
tx-udp_tnl-segmentation: off [fixed]
tx-udp_tnl-csum-segmentation: off [fixed]
tx-gso-partial: off [fixed]
tx-sctp-segmentation: off [fixed]
tx-esp-segmentation: off [fixed]
tx-udp-segmentation: off [fixed]
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off [fixed]
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off [fixed]
hw-tc-offload: off [fixed]
esp-hw-offload: off [fixed]
esp-tx-csum-hw-offload: off [fixed]
rx-udp_tunnel-port-offload: off [fixed]
tls-hw-tx-offload: off [fixed]
tls-hw-rx-offload: off [fixed]
rx-gro-hw: off [fixed]
tls-hw-record: off [fixed]
this causes retries when running iperf3 in transmit mode.
with offloading disabled:
# ethtool -K eth0 rx off tx off
# ethtool -k eth0
Features for eth0:
rx-checksumming: off
tx-checksumming: off
tx-checksum-ipv4: off
tx-checksum-ip-generic: off [fixed]
tx-checksum-ipv6: off
tx-checksum-fcoe-crc: off [fixed]
tx-checksum-sctp: off [fixed]
scatter-gather: on
tx-scatter-gather: on
tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: off
tx-tcp-segmentation: off [fixed]
tx-tcp-ecn-segmentation: off [fixed]
tx-tcp-mangleid-segmentation: off [fixed]
tx-tcp6-segmentation: off [fixed]
udp-fragmentation-offload: off
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off [fixed]
rx-vlan-offload: off [fixed]
tx-vlan-offload: off [fixed]
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: on [fixed]
rx-vlan-filter: off [fixed]
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-gre-csum-segmentation: off [fixed]
tx-ipxip4-segmentation: off [fixed]
tx-ipxip6-segmentation: off [fixed]
tx-udp_tnl-segmentation: off [fixed]
tx-udp_tnl-csum-segmentation: off [fixed]
tx-gso-partial: off [fixed]
tx-sctp-segmentation: off [fixed]
tx-esp-segmentation: off [fixed]
tx-udp-segmentation: off [fixed]
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off [fixed]
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off [fixed]
hw-tc-offload: off [fixed]
esp-hw-offload: off [fixed]
esp-tx-csum-hw-offload: off [fixed]
rx-udp_tunnel-port-offload: off [fixed]
tls-hw-tx-offload: off [fixed]
tls-hw-rx-offload: off [fixed]
rx-gro-hw: off [fixed]
tls-hw-record: off [fixed]
# iperf3 -c 192.168.1.100
Connecting to host 192.168.1.100, port 5201
[ 5] local 192.168.1.131 port 58412 connected to 192.168.1.100 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 112 MBytes 937 Mbits/sec 32 59.4 KBytes
[ 5] 1.00-2.00 sec 112 MBytes 937 Mbits/sec 25 290 KBytes
[ 5] 2.00-3.00 sec 109 MBytes 915 Mbits/sec 150 279 KBytes
[ 5] 3.00-4.00 sec 112 MBytes 941 Mbits/sec 0 334 KBytes
[ 5] 4.00-5.00 sec 112 MBytes 941 Mbits/sec 0 342 KBytes
[ 5] 5.00-6.00 sec 111 MBytes 934 Mbits/sec 98 320 KBytes
[ 5] 6.00-7.00 sec 111 MBytes 929 Mbits/sec 123 76.4 KBytes
[ 5] 7.00-8.00 sec 109 MBytes 917 Mbits/sec 119 277 KBytes
[ 5] 8.00-9.00 sec 112 MBytes 941 Mbits/sec 0 314 KBytes
[ 5] 9.00-10.00 sec 112 MBytes 940 Mbits/sec 0 318 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 1.09 GBytes 933 Mbits/sec 547 sender
[ 5] 0.00-10.04 sec 1.09 GBytes 929 Mbits/sec receiver
iperf Done.
so for me disabling offloading didn't change anything.
Jose, is my command for disabling offloading correct?
Simon, does disabling offloading improve anything in your iperf2 or
real-world scenario on a kernel where you previously had performance
issues?
Regards
Martin
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