Re: [PATCH 06/13] examples/eventdev: add non burst mode generic worker

["Van Haaren, Harry" <harry.van.haaren@intel.com>]

> From: Pavan Nikhilesh [mailto:pbhagavatula@caviumnetworks.com]
> Sent: Thursday, December 7, 2017 8:37 PM
> To: Eads, Gage <gage.eads@intel.com>; jerin.jacobkollanukkaran@cavium.com;
> Van Haaren, Harry <harry.van.haaren@intel.com>; Rao, Nikhil
> <nikhil.rao@intel.com>; hemant.agrawal@nxp.com; Ma, Liang J
> <liang.j.ma@intel.com>
> Cc: dev@dpdk.org; Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
> Subject: [PATCH 06/13] examples/eventdev: add non burst mode generic worker
> 
> Currently, worker uses burst dequeue and burst enqueue to forward events.
> Add a non burst mode based on the event dev capabilities.
> 
> Signed-off-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>

<snip>

> diff --git a/examples/eventdev_pipeline_sw_pmd/pipeline_worker_generic.c
> b/examples/eventdev_pipeline_sw_pmd/pipeline_worker_generic.c
> index a72b7b2f9..5998aae95 100644
> --- a/examples/eventdev_pipeline_sw_pmd/pipeline_worker_generic.c
> +++ b/examples/eventdev_pipeline_sw_pmd/pipeline_worker_generic.c
> @@ -1,5 +1,91 @@
> +/*
> + *   BSD LICENSE
> + *
> + *   Copyright 2016 Intel Corporation.
> + *   Copyright 2016 Cavium, Inc.
> + *
> + *   Redistribution and use in source and binary forms, with or without
> + *   modification, are permitted provided that the following conditions
> + *   are met:
> + *
> + *     * Redistributions of source code must retain the above copyright
> + *       notice, this list of conditions and the following disclaimer.
> + *     * Redistributions in binary form must reproduce the above copyright
> + *       notice, this list of conditions and the following disclaimer in
> + *       the documentation and/or other materials provided with the
> + *       distribution.
> + *     * Neither the name of Cavium, Inc nor the names of its
> + *       contributors may be used to endorse or promote products derived
> + *       from this software without specific prior written permission.
> + *
> + *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
> + *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
> + *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
> + *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
> + *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
> + *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> + *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
> + *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> + */
> +

Adding a license to an existing file? Also can now be updated to SPDX style

>  static __rte_always_inline int
>  consumer_burst(void)
>  {
> @@ -412,9 +555,13 @@ generic_opt_check(void)
>  void
>  set_worker_generic_setup_data(struct setup_data *caps, bool burst)
>  {
> -	RTE_SET_USED(burst);
> -	caps->consumer_loop = consumer_burst;
> -	caps->worker_loop = worker_generic_burst;
> +	if (burst) {
> +		caps->consumer_loop = consumer_burst;
> +		caps->worker_loop = worker_generic_burst;
> +	} else {
> +		caps->consumer_loop = consumer;
> +		caps->worker_loop = worker_generic;
> +	}

This won't scale well. See notes on future patch (9/13 and 10/13)