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* [dpdk-dev] Multiple LCore receiving from same port/queue
@ 2013-10-16 20:32 Sambath Kumar Balasubramanian
  2013-10-16 21:06 ` Stephen Hemminger
  2013-10-16 21:12 ` Vladimir Medvedkin
  0 siblings, 2 replies; 4+ messages in thread
From: Sambath Kumar Balasubramanian @ 2013-10-16 20:32 UTC (permalink / raw)
  To: dev

Hi,

  I have a test dpdk application with 2 lcores receiving packets
using rte_eth_rx_burst API. Is this a supported packet processing model.
The reason I am asking is I am running into some trouble with this model.

Thanks,
Sambath

^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: [dpdk-dev] Multiple LCore receiving from same port/queue
  2013-10-16 20:32 [dpdk-dev] Multiple LCore receiving from same port/queue Sambath Kumar Balasubramanian
@ 2013-10-16 21:06 ` Stephen Hemminger
  2013-10-16 21:12 ` Vladimir Medvedkin
  1 sibling, 0 replies; 4+ messages in thread
From: Stephen Hemminger @ 2013-10-16 21:06 UTC (permalink / raw)
  To: Sambath Kumar Balasubramanian; +Cc: dev

On Wed, 16 Oct 2013 13:32:33 -0700
Sambath Kumar Balasubramanian <sambath.balasubramanian@gmail.com> wrote:

> Hi,
> 
>   I have a test dpdk application with 2 lcores receiving packets
> using rte_eth_rx_burst API. Is this a supported packet processing model.
> The reason I am asking is I am running into some trouble with this model.
> 
> Thanks,
> Sambath

For performance reasons, receive and transmit functions are not thread safe.
You need to have one queue per lcore, or use locking.

^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: [dpdk-dev] Multiple LCore receiving from same port/queue
  2013-10-16 20:32 [dpdk-dev] Multiple LCore receiving from same port/queue Sambath Kumar Balasubramanian
  2013-10-16 21:06 ` Stephen Hemminger
@ 2013-10-16 21:12 ` Vladimir Medvedkin
  2013-10-16 21:37   ` Sambath Kumar Balasubramanian
  1 sibling, 1 reply; 4+ messages in thread
From: Vladimir Medvedkin @ 2013-10-16 21:12 UTC (permalink / raw)
  To: Sambath Kumar Balasubramanian; +Cc: dev

Hi,

By default, you can't poll same queue on same port from different lcores.
If you need poll same queue on several lcores use locks to avoid race
conditions.


2013/10/17 Sambath Kumar Balasubramanian <sambath.balasubramanian@gmail.com>

> Hi,
>
>   I have a test dpdk application with 2 lcores receiving packets
> using rte_eth_rx_burst API. Is this a supported packet processing model.
> The reason I am asking is I am running into some trouble with this model.
>
> Thanks,
> Sambath
>

^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: [dpdk-dev] Multiple LCore receiving from same port/queue
  2013-10-16 21:12 ` Vladimir Medvedkin
@ 2013-10-16 21:37   ` Sambath Kumar Balasubramanian
  0 siblings, 0 replies; 4+ messages in thread
From: Sambath Kumar Balasubramanian @ 2013-10-16 21:37 UTC (permalink / raw)
  To: Vladimir Medvedkin; +Cc: dev

Thanks Stephen and Vladimir. Appreciate the quick response.

Thanks,
Sambath


On Wed, Oct 16, 2013 at 2:12 PM, Vladimir Medvedkin <medvedkinv@gmail.com>wrote:

> Hi,
>
> By default, you can't poll same queue on same port from different lcores.
> If you need poll same queue on several lcores use locks to avoid race
> conditions.
>
>
> 2013/10/17 Sambath Kumar Balasubramanian <
> sambath.balasubramanian@gmail.com>
>
>> Hi,
>>
>>   I have a test dpdk application with 2 lcores receiving packets
>> using rte_eth_rx_burst API. Is this a supported packet processing model.
>> The reason I am asking is I am running into some trouble with this model.
>>
>> Thanks,
>> Sambath
>>
>
>

^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-10-16 21:36 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2013-10-16 20:32 [dpdk-dev] Multiple LCore receiving from same port/queue Sambath Kumar Balasubramanian
2013-10-16 21:06 ` Stephen Hemminger
2013-10-16 21:12 ` Vladimir Medvedkin
2013-10-16 21:37   ` Sambath Kumar Balasubramanian

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