Re: [dpdk-dev] Eventdev DSW and eth_rx_adapters

[Mattias Rönnblom]

On 2018-12-19 19:37, Venky Venkatesh wrote:

On 12/18/18, 10:53 PM, "Mattias Rönnblom" <mattias.ronnb...@ericsson.com> 
wrote:

     On 2018-12-18 02:46, Venky Venkatesh wrote:
     > Hi,
     > I am relatively new to DPDK and am trying to use the eventdev library.
     > The sw_evdev runs on a single core (service core). And then there is 
rte_event_eth_rx_adapter_ which links the sw_evdev to the ethdev. This adapter is 
also service core based. The DSW runs on all cores – and thus doesn’t use service 
cores. If we use the existing adapter, in the DSW paradigm:
     >
     >    *   The benefit of DSW is diminished as the packets would first have 
to go thru a possible choke point viz. the service core.

Yes, but the practical implications may not be as great as you think. A

     single service core will be able to handle (e.g. relay) a fair amount of
     events into/out-of an event device.

You are however not forced to use service cores. You may use one or more

     of your workers to feed an event device.

[VV]: Just to be sure we are on the same page: The workers in a sort of 
alternating fashion call the ethdev to dequeue and enqueue_new into the 
eventdev and of course the dequeue from the eventdev (sort of analogous to the 
code that you provided with integrated producer and consumer).

Yes.