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

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Message-ID: <1480046044.8455.529.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Thu, 24 Nov 2016 19:54:04 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Eli Cooper <elicooper@....com>, netdev@...r.kernel.org
Subject: Re: Large performance regression with 6in4 tunnel (sit)

On Fri, 2016-11-25 at 14:09 +1100, Stephen Rothwell wrote:
> 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
> 

Could you now report : 

ethtool -k eth0

Thanks