netdev - Re: [PATCH] tilegx: fix some issues in the SW TSO support

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Message-ID: <508AD3CB.8070303@tilera.com>
Date:	Fri, 26 Oct 2012 14:17:47 -0400
From:	Chris Metcalf <cmetcalf@...era.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
CC:	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tilegx: fix some issues in the SW TSO support

On 10/25/2012 3:48 PM, Ben Hutchings wrote:
> On Thu, 2012-10-25 at 20:36 +0100, Ben Hutchings wrote:
> [...]
>> There's a simple way to test this - configure the 'attacker' host and
>> interface like this:
>>
>> # ip link set $IFACE mtu 128
>> # sysctl net.ipv4.route.min_adv_mss=88
>>
>> and then use something like netperf to generate a high bandwidth stream
>> of TCP traffic toward it from the tilegx interface.
> Also you would need to run some other traffic in parallel (multiple
> streams to the 'attacker' and some more normal streams) to ensure there
> is real contention.

Thanks!  I've filed a bugzilla within Tilera to come back and revisit this
- I think it's not a short-term problem so we'll find some time to look at
it in the future.  Or, someone reading this could try it themselves and
submit the patch :-)

-- 
Chris Metcalf, Tilera Corp.
http://www.tilera.com

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