netdev - Re: Large performance regression with 6in4 tunnel (sit)

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Date:   Fri, 25 Nov 2016 14:09:38 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     Eli Cooper <elicooper@....com>, netdev@...r.kernel.org
Subject: Re: Large performance regression with 6in4 tunnel (sit)

Hi Eric,

On Thu, 24 Nov 2016 19:01:28 -0800 Eric Dumazet <eric.dumazet@...il.com> wrote:
>
> Since I do not have this problem at all on my hosts, it could be a buggy
> ethernet driver.
> 
> Could you share what NIC card and driver you are using ?


# uname -a
Linux bilbo 4.7.0-1-amd64 #1 SMP Debian 4.7.8-1 (2016-10-19) x86_64 GNU/Linux

# lspci | grep -i net
03:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network Connection (rev 03)
04:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network Connection (rev 03)

from boot dmesg:

[    7.573725] igb: Intel(R) Gigabit Ethernet Network Driver - version 5.3.0-k
[    7.573726] igb: Copyright (c) 2007-2014 Intel Corporation.
[    7.752918] igb 0000:03:00.0: added PHC on eth0
[    7.752925] igb 0000:03:00.0: Intel(R) Gigabit Ethernet Network Connection
[    7.752927] igb 0000:03:00.0: eth0: (PCIe:2.5Gb/s:Width x1) 00:1e:67:9f:d4:24
[    7.753460] igb 0000:03:00.0: eth0: PBA No: 102100-000
[    7.753460] igb 0000:03:00.0: Using MSI-X interrupts. 4 rx queue(s), 4 tx queue(s)
[    7.902433] igb 0000:04:00.0: added PHC on eth1
[    7.902434] igb 0000:04:00.0: Intel(R) Gigabit Ethernet Network Connection
[    7.902435] igb 0000:04:00.0: eth1: (PCIe:2.5Gb/s:Width x1) 00:1e:67:9f:d4:25
[    7.902484] igb 0000:04:00.0: eth1: PBA No: 102100-000
[    7.902485] igb 0000:04:00.0: Using MSI-X interrupts. 4 rx queue(s), 4 tx queue(s)
[   19.753325] igb 0000:03:00.0 eth0: igb: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX

-- 
Cheers,
Stephen Rothwell