[dpdk-dev] [dpdk-users] how to Read(Write) from(to) via lcores in dpdk regardless of NIC

[Mahdi Moradmand Badie]

Dear Andriy,
I did my task with the help of rte_ring, but now I wanna replace rte_ring
with real share cache(L3),
May I ask you if there is any possibility in DPDK in order to do it.
Thanks in advance,

On 9 March 2016 at 05:26, Andriy Berestovskyy <aber at semihalf.com> wrote:

> Mahdi,
> 1. Sure, the rte_ring is another good way to communicate between the
> lcores. If you have just one "worker" lcore or you do not care about
> packet ordering, you might prefer using rte_ring over the
> rte_distributor.
>
>
> 2. For the simplicity, you might assume that any of your shared
> structures (rte_ring or rte_distributor) eventually get into the
> cache.
>
> Andriy
>
> On Tue, Mar 8, 2016 at 10:49 PM, Mahdi Moradmand Badie
> <mahdi.mbadie at gmail.com> wrote:
> > Another issue, ;)
> > How I could access to the share memory cache of lcores (L3), the rte_ring
> > is exactly that??
> >
> > On 8 March 2016 at 13:08, Mahdi Moradmand Badie <mahdi.mbadie at gmail.com>
> > wrote:
> >
> >> Dear Andriy,
> >> Sorry for interrupt again,
> >> As I see in rte_distributor, it is using rte_eth (ethernet), while I
> >> wanna without using any NIC because I don't have it on my personal
> computer
> >> :)
> >>
> >> On 8 March 2016 at 11:49, Mahdi Moradmand Badie <mahdi.mbadie at gmail.com
> >
> >> wrote:
> >>
> >>> Thanks so much Andriy,
> >>> Regarding cross-post, yes you are right sorry about that and of course
> >>> afterwards.
> >>>
> >>> On 8 March 2016 at 03:17, Andriy Berestovskyy <aber at semihalf.com>
> wrote:
> >>>
> >>>> Hi Mahdi,
> >>>> Looks like the DPDK's rte_distributor is the right tool for your task.
> >>>> Please have a look at:
> >>>> http://dpdk.org/doc/guides/prog_guide/packet_distrib_lib.html
> >>>>
> >>>> There is also the Distributor Sample Application in DPDK:
> >>>> http://dpdk.org/doc/guides/sample_app_ug/dist_app.html
> >>>>
> >>>>
> >>>> Please do not cross-post to dev@ mailing list.
> >>>>
> >>>> Regards,
> >>>> Andriy
> >>>>
> >>>> On Tue, Mar 8, 2016 at 6:41 AM, Mahdi Moradmand Badie
> >>>> <mahdi.mbadie at gmail.com> wrote:
> >>>> > I wanna create for example 3 different packets in core_0 as master
> and
> >>>> > store them one by one in share memory(rte_ring),
> >>>> > then the core_1 as slave read them and do function on them (ex.
> >>>> P1+P2+P3)
> >>>> > and again store in share memory, finally the core_0 read the packets
> >>>> from
> >>>> > share memory and compare them with whatever expected :)
> >>>> > As I said and you mentioned is the same? :)
> >>>> >
> >>>> > On 8 March 2016 at 00:35, Hamed Zaghaghi <hamed.zaghaghi at gmail.com>
> >>>> wrote:
> >>>> >
> >>>> >> Hi,
> >>>> >>
> >>>> >> If I understood well you need to do these tasks:
> >>>> >> 1. Packet crafting (I think that DPDK has no functions for this
> task)
> >>>> >> 2. Store packets (DPDK has (rte_mbuf)[
> >>>> >> http://dpdk.org/doc/api/rte__mbuf_8h.html])
> >>>> >> 3. Share between lcores (DPDK offers rte_ring)
> >>>> >>
> >>>> >>
> >>>> >>
> >>>> >> On Tue, Mar 8, 2016 at 8:45 AM Mahdi Moradmand Badie <
> >>>> >> mahdi.mbadie at gmail.com> wrote:
> >>>> >>
> >>>> >>> Dear Hamed,
> >>>> >>>
> >>>> >>> First of all thank you so much for your kindly reply,
> >>>> >>>
> >>>> >>> It's the primary part of the big project, in order to be more
> >>>> familiar
> >>>> >>> with DPDK,
> >>>> >>> I have to implement the mentioned framework by use of DPDK,
> >>>> >>> And finally we wanna implement the cache locking approach (via
> help
> >>>> of
> >>>> >>> features like Cache Allocation Technology(CAT), Cache Monitoring
> >>>> Technology
> >>>> >>> (CMT)) in Xeon processor (my supervisor told me this simple
> exercise
> >>>> >>> will be helpful to do the final part) in such a way we could
> >>>> dedicate a
> >>>> >>> specific part of shared memory (L3) to each core which the other
> >>>> don't
> >>>> >>> access to it.
> >>>> >>> Obviously using of DPDK with Xeon which both are from "Intel", is
> >>>> >>> considered as strength point.
> >>>> >>>
> >>>> >>> I hope this was more clear :)
> >>>> >>>
> >>>> >>> On 7 March 2016 at 23:56, Hamed Zaghaghi <
> hamed.zaghaghi at gmail.com>
> >>>> >>> wrote:
> >>>> >>>
> >>>> >>>> Hi Mahdi,
> >>>> >>>>
> >>>> >>>> Why do you want to use DPDK when you don't use NIC? You can do
> what
> >>>> you
> >>>> >>>> want outside of DPDK.
> >>>> >>>>
> >>>> >>>> Regards,
> >>>> >>>> Hamed Zaghaghi
> >>>> >>>>
> >>>> >>>> On Tue, Mar 8, 2016 at 12:16 AM Mahdi Moradmand Badie <
> >>>> >>>> mahdi.mbadie at gmail.com> wrote:
> >>>> >>>>
> >>>> >>>>> Dear All,
> >>>> >>>>> I am Mahdi and I am new in DPDK,
> >>>> >>>>> I wanna generate for example 3 different packets in core0 as
> master
> >>>> >>>>> write
> >>>> >>>>> it to share memory (L3), then core1 as slave read this packets,
> >>>> change
> >>>> >>>>> them
> >>>> >>>>> with for example function1 and write again in share memory (L3)
> and
> >>>> >>>>> finally
> >>>> >>>>> check the result with whatever I expect.
> >>>> >>>>> The most important thing is that I don't wanna use NIC and I
> don't
> >>>> know
> >>>> >>>>> for
> >>>> >>>>> working with cores how I can write/read to/from them, I mean
> with
> >>>> which
> >>>> >>>>> template and sequence???
> >>>> >>>>> Thanks in advance,
> >>>> >>>>>
> >>>> >>>>
> >>>> >>>
> >>>> >>>
> >>>> >>> --
> >>>> >>> M at hdi Mor at dm@nd B at die
> >>>> >>>
> >>>> >>
> >>>> >
> >>>> >
> >>>> > --
> >>>> > M at hdi Mor at dm@nd B at die
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>> Andriy Berestovskyy
> >>>>
> >>>
> >>>
> >>>
> >>> --
> >>> M at hdi Mor at dm@nd B at die
> >>>
> >>
> >>
> >>
> >> --
> >> M at hdi Mor at dm@nd B at die
> >>
> >
> >
> >
> > --
> > M at hdi Mor at dm@nd B at die
>
>
>
> --
> Andriy Berestovskyy
>



-- 
M at hdi Mor at dm@nd B at die