[dpdk-dev] drops while transmitting to the kni using rte_kni_tx_burst()

[Shirley Avishour]

Hi Jason,
You are right but I've tried to work in multiple mode as well and it did
not change the result.
I hope this issue will be solved.

Thanks,
Shirley.

On Fri, Jan 20, 2017 at 9:48 PM, Jason Kwon <m43kwon at gmail.com> wrote:

> Sorry to hijack the thread, but I was wondering, is the binding of the KNI
> kernel thread only applicable in multiple kthread mode?  Does it apply in
> single kernel thread mode?  Looking at the 16.07.2 source, I saw the
> following:
>
>         /**
>          * Create a new kernel thread for multiple mode, set its core
> affinity,
>          * and finally wake it up.
>          */
>         if (multiple_kthread_on) {
>                 kni->pthread = kthread_create(kni_thread_multiple,
>                                               (void *)kni,
>                                               "kni_%s", kni->name);
>                 if (IS_ERR(kni->pthread)) {
>                         kni_dev_remove(kni);
>                         return -ECANCELED;
>                 }
>                 if (dev_info.force_bind)
>                         kthread_bind(kni->pthread, kni->core_id);
>                 wake_up_process(kni->pthread);
>         }
>
> Thanks,
>
> Jason
>
> On Mon, Jan 16, 2017 at 6:42 AM, Ferruh Yigit <ferruh.yigit at intel.com>
> wrote:
>
>> On 1/16/2017 12:20 PM, Shirley Avishour wrote:
>> > Hi,
>> > I have an application over dpdk which is consisted of the following
>> threads
>> > each running on a separate core:
>> > 1) rx thread which listens on in a poll mode for traffic
>> > 2) 2 packet processing threads (for load balancing)
>> > 3) kni thread (which also runs on a separate core).
>>
>> This is kernel thread, right? Is it bind to any specific core?
>> Is it possible that this thread shares the core with 2nd processing
>> thread when enabled?
>>
>> >
>> > the rx thread receives packets and clones them and transmit a copy to
>> the
>> > kni and the other packet is sent to the packet processing unit (hashing
>> > over 2 threads).
>> > the receive traffic rate is 100Mbps.
>> > When working with single packet processing thread I am able to get all
>> the
>> > 100Mbps towards the kni with no drops.
>> > but when I activate my application with 2 packet processing threads I
>> start
>> > facing drops towards the kni.
>> > the way I see it the only difference now is that I have another threads
>> > which handles an mbuf and frees it once processing is completed.
>> > Can anyone assist with this case please?
>> >
>> > Thanks!
>> >
>>
>>
>