netdev - Re: HTB, HFSC, PIE, FIFO stuck on 2.4Gbit on default values

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Message-ID: <1446585826.23275.78.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Tue, 03 Nov 2015 13:23:46 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Denys Fedoryshchenko <nuclearcat@...learcat.com>
Cc:	Netdev <netdev@...r.kernel.org>
Subject: Re: HTB, HFSC, PIE, FIFO stuck on 2.4Gbit on default values

On Tue, 2015-11-03 at 22:24 +0200, Denys Fedoryshchenko wrote:

> I wont argue on that, you are right.
> Ok, then it is a bit offtopic in current case, different setup, but i 
> know this one has easy to reproduce issues with offloading. but this is 
> bug related to that, directly appearing when i enable tso/gso/gro. I am 
> losing access to remote box, so max i can do right now:
> ethtool -K eth0 tso on gso on gro on; sleep 5;ethtool -K eth0 tso off 
> gso off gro off
> 
> No shapers, just plain nat. I suspect it might be specific to network 
> card, but not sure.
> 



What happens if you enable gro, but disable tso ?

With GRO enabled, you'll get a good performance increase, as forwarding
and qdisc will use big packets.



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