> From: Pavan Nikhilesh [mailto:[email protected]]
> Sent: Wednesday, January 10, 2018 2:52 PM
> To: [email protected]; [email protected]; Van
> Haaren, Harry <[email protected]>; Eads, Gage
> <[email protected]>; [email protected]; [email protected]; Ma,
> Liang J <[email protected]>
> Cc: [email protected]; Pavan Nikhilesh <[email protected]>
> Subject: [dpdk-dev] [PATCH v3 08/12] app/eventdev: add pipeline queue test
>
> This is a pipeline queue test case that aims at testing the following:
> 1. Measure the end-to-end performance of an event dev with a ethernet dev.
> 2. Maintain packet ordering from Rx to Tx.
>
> The pipeline queue test configures the eventdev with Q queues and P ports,
> where Q is (nb_ethdev * nb_stages) + nb_ethdev and P is nb_workers.
Why (nb_ethdev * nb_stages) number of Queues?
I had expected if the test is for eventdev with Q queues, P ports, that that Q
number of stages is all that is required, (possibly with +1 for TX queue, iirc
some HW doesn't require the TX Queue).
Am I missing something here? I've left the code snippet I don't understand
below.
<snip>
> Note: The --prod_type_ethdev is mandatory for running the application.
Mandatory arguments seem pointless to me, unless there are other valid options
to choose from.
> +
> +static int
> +pipeline_queue_eventdev_setup(struct evt_test *test, struct evt_options
> *opt)
> +{
> + int ret;
> + int nb_ports;
> + int nb_queues;
> + int nb_stages = opt->nb_stages;
> + uint8_t queue;
> + struct rte_event_dev_info info;
> +
> + nb_ports = evt_nr_active_lcores(opt->wlcores);
> + nb_queues = rte_eth_dev_count() * (nb_stages);
As per comment above, this is what I don't understand? Why more queues than
stages?
