netdev - Re: [PATCH] macvtap: Fix macvtap_get

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Message-ID: <4ED30D2B.10907@redhat.com>
Date:	Mon, 28 Nov 2011 12:25:15 +0800
From:	Jason Wang <jasowang@...hat.com>
To:	Krishna Kumar2 <krkumar2@...ibm.com>
CC:	arnd@...db.de, davem@...emloft.net, levinsasha928@...il.com,
	"Michael S. Tsirkin" <mst@...hat.com>, netdev@...r.kernel.org,
	virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH] macvtap: Fix macvtap_get_queue to use rxhash first

On 11/25/2011 12:09 PM, Krishna Kumar2 wrote:
> Jason Wang<jasowang@...hat.com>  wrote on 11/25/2011 08:51:57 AM:
>> My description is not clear again :(
>> I mean the same vhost thead:
>>
>> vhost thread #0 transmits packets of flow A on processor M
>> ...
>> vhost thread #0 move to another process N and start to transmit packets
>> of flow A
> Thanks for clarifying. Yes, binding vhosts to CPU's
> makes the incoming packet go to the same vhost each
> time. BTW, are you doing any binding and/or irqbalance
> when you run your tests? I am not running either at
> this time, but thought both might be useful.

I'm using ixgbe for testing also, for host, its driver seems provide irq 
affinity hint, so no binding or irqbalance is needed. For guest, 
irqbalance is used in guest. I've tried bind irq in guest, and it can 
improve the rx performance.

> - KK
>
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