[Bug 268490] [igb] [lagg] [vlan]: Intel i210 performance severely degraded

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 15 Apr 2023 18:59:33 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268490

--- Comment #49 from Santiago Martinez <sm@codenetworks.net> ---
Hi Daniel, 

from the config posted seems to be diff,but maybe i miss understood the first
msg.Anyhow the behavior that Marek is describing is not limited only to those
cards. You can increase the MTU on the phy or reduce the mtu on the logical. 

I can see the same issue with IXL, BNXT and so on.

This is an output from my lab machines.
ixl2: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu
9000

ixl2.1011: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
mtu 9000
BR_DCN_PF: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9000

Connecting to host 192.168.11.42, port 5201
[  5] local 192.168.11.41 port 42631 connected to 192.168.11.42 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.01   sec  69.9 KBytes   568 Kbits/sec    2   8.73 KBytes       
[  5]   1.01-2.04   sec  0.00 Bytes  0.00 bits/sec    2   8.73 KBytes       
[  5]   2.04-3.04   sec  0.00 Bytes  0.00 bits/sec    1   8.73 KBytes       
[  5]   3.04-4.00   sec  0.00 Bytes  0.00 bits/sec    0   8.73 KBytes       
[  5]   4.00-5.05   sec  0.00 Bytes  0.00 bits/sec    0   8.73 KBytes       
^C[  5]   5.05-5.82   sec  0.00 Bytes  0.00 bits/sec    1   8.73 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -

ifconfig ixl2.1011 mtu 8974
ifconfig BR_DCN_PF  mtu 8974
iperf3 -c 192.168.11.42

Connecting to host 192.168.11.42, port 5201
[  5] local 192.168.11.41 port 48630 connected to 192.168.11.42 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   120 MBytes  1.00 Gbits/sec    0   1.41 MBytes       
[  5]   1.00-2.00   sec   118 MBytes   990 Mbits/sec    0   1.75 MBytes

-- 
You are receiving this mail because:
You are the assignee for the bug.