netdev - Re: multiqueue interrupts...

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Date:	Fri, 19 Sep 2008 14:29:07 +0200
From:	Brice Goglin <brice@...i.com>
To:	David Miller <davem@...emloft.net>
CC:	Ben Hutchings <bhutchings@...arflare.com>, netdev@...r.kernel.org
Subject: Re: multiqueue interrupts...

Ben Hutchings wrote:
> On Thu, 2008-09-18 at 19:38 -0700, David Miller wrote:
> [...]
>   
>> So on a multiqueue card with 2 RX queues and 2 TX queues we'd
>> have names like:
>>
>> 	eth0-rx-0
>> 	eth0-rx-1
>> 	eth0-tx-0
>> 	eth0-tx-1
>>
>> So let's make an effort to get this done right in 2.6.28 and meanwhile
>> Arjan can add the irqbalanced code.
>>     
>
> What about the case where an interrupt is shared between RX and TX
> completions?  Our hardware is very flexible in this regard, but based on
> performance testing prior to the introduction of TX multiqueue we
> currently allocate multiple interrupts for RX completions and share the
> first with TX completions.
>   

myri10ge uses the same interrupts for TX and RX. The current name is
eth%d:slice-%d but we could change it if there's a consensus.

Brice

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