netdev - Re: [PATCH net-next V2] tun: introduce tx skb ring

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Date:	Wed, 15 Jun 2016 07:55:27 -0400
From:	Jamal Hadi Salim <jhs@...atatu.com>
To:	Jason Wang <jasowang@...hat.com>, mst@...hat.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
	davem@...emloft.net
Cc:	eric.dumazet@...il.com, brouer@...hat.com
Subject: Re: [PATCH net-next V2] tun: introduce tx skb ring

On 16-06-15 07:52 AM, Jamal Hadi Salim wrote:
> On 16-06-15 04:38 AM, Jason Wang wrote:
>> We used to queue tx packets in sk_receive_queue, this is less
>> efficient since it requires spinlocks to synchronize between producer

> 
> So this is more exercising the skb array improvements. For tun
> it would be useful to see general performance numbers on user/kernel
> crossing (i.e tun read/write).
> If you have the cycles can you run such tests?
> 

Ignore my message - you are running pktgen from a VM towards the host.
So the numbers you posted are what i was interested in.
Thanks for the good work.

cheers,
jamal