On 15 June 2017 at 20:00, Francois Ozog <[email protected]> wrote:
> I wonder then how packet receive in HW driven packet buffers is handled, > may be with device memory.... > > Can you explain the cases of packet receive with ODP application supplied > (through packetio open) mempools? > There needs to be atleast one pool linked to a pktio interface and there can be more than one if application wants to configure different pools for different flows. The configuration of the pool is given by the application so that any traffic burst in a single flow does not overload the entire system processing for other flows. So when application configures a packet pool we allocate internal shared memory and pool allocator and link it to the pktio interface. When packet is received in the pktio interface the packet is allocated from the linked pool. Does this answer your question? Regards, Bala > > FF > > On 15 June 2017 at 15:42, Bala Manoharan <[email protected]> > wrote: > >> Add on. It is also possible that the pool might not be linked to any pktio >> eg buffer pools, hence in implementation we can not wait for the pool to >> be >> linked to pktio. >> >> Regards, >> Bala >> >> On 15 June 2017 at 18:11, Bill Fischofer <[email protected]> >> wrote: >> >> > A pool may be associated with a pktio at open time, but this >> > association is not exclusive. In theory an ODP implementation could >> > defer actual pool creation until it was first used, but such an >> > approach would be unlikely to yield any real benefits while creating a >> > lot of complications along the way since odp_pool_create() is the only >> > opportunity the implementation has to fail the pool creation in a >> > defined manner. >> > >> > On Thu, Jun 15, 2017 at 2:29 AM, Bala Manoharan >> > <[email protected]> wrote: >> > > Same here. Pool is created during odp_pool_create API. >> > > >> > > >> > > Regards, >> > > Bala >> > > >> > > On 15 June 2017 at 12:36, Nikhil Agarwal <[email protected]> >> wrote: >> > > >> > >> Pool is created at odp_pool_create only. You can allocate packets >> form >> > it >> > >> even before pktio_open. >> > >> >> > >> Regards >> > >> Nikhil >> > >> >> > >> -----Original Message----- >> > >> From: lng-odp [mailto:[email protected]] On Behalf Of >> > >> Honnappa Nagarahalli >> > >> Sent: Thursday, June 15, 2017 9:27 AM >> > >> To: lng-odp-forward <[email protected]> >> > >> Subject: [lng-odp] Mem pool creation in Cavium/NXP implementations >> > >> >> > >> Hi Bala/Nikhil, >> > >> I was wondering when is the memory pool created in your >> > implementation >> > >> of ODP? The programming model is that the application creates the >> memory >> > >> pool and passes that pool to the pkt I/O during packet I/O open >> call. Do >> > >> you actually create the pool when the application calls >> > odp_pool_create? Or >> > >> is the pool created during packet I/O open? >> > >> >> > >> Appreciate your answers. >> > >> >> > >> Thank you, >> > >> Honnappa >> > >> >> > >> > > > > -- > [image: Linaro] <http://www.linaro.org/> > François-Frédéric Ozog | *Director Linaro Networking Group* > T: +33.67221.6485 > [email protected] | Skype: ffozog > >
