Re: [dpdk-dev] [PATCH v2 07/11] examples/l3fwd: add service core setup based on caps

[Pavan Nikhilesh Bhagavatula <pbhagavatula@marvell.com>]

>> diff --git a/examples/l3fwd/main.c b/examples/l3fwd/main.c
>> index 20df12748..69d212bc2 100644
>> --- a/examples/l3fwd/main.c
>> +++ b/examples/l3fwd/main.c
>> @@ -826,6 +826,93 @@ prepare_ptype_parser(uint16_t portid,
>uint16_t queueid)
>>  	return 0;
>>  }
>>
>> +static inline int
>> +l3fwd_service_enable(uint32_t service_id)
>> +{
>> +	uint8_t min_service_count = UINT8_MAX;
>> +	uint32_t slcore_array[RTE_MAX_LCORE];
>> +	unsigned int slcore = 0;
>> +	uint8_t service_count;
>> +	int32_t slcore_count;
>> +
>> +	if (!rte_service_lcore_count())
>> +		return -ENOENT;
>> +
>> +	slcore_count = rte_service_lcore_list(slcore_array,
>RTE_MAX_LCORE);
>> +	if (slcore_count < 0)
>> +		return -ENOENT;
>> +	/* Get the core which has least number of services running. */
>> +	while (slcore_count--) {
>> +		/* Reset default mapping */
>> +		rte_service_map_lcore_set(service_id,
>> +				slcore_array[slcore_count], 0);
>> +		service_count = rte_service_lcore_count_services(
>> +				slcore_array[slcore_count]);
>> +		if (service_count < min_service_count) {
>> +			slcore = slcore_array[slcore_count];
>> +			min_service_count = service_count;
>> +		}
>> +	}
>> +	if (rte_service_map_lcore_set(service_id, slcore, 1))
>> +		return -ENOENT;
>> +	rte_service_lcore_start(slcore);
>> +
>> +	return 0;
>> +}
>> +
>> +static void
>> +l3fwd_event_service_setup(void)
>> +{
>> +	struct l3fwd_event_resources *evt_rsrc =
>l3fwd_get_eventdev_rsrc();
>> +	struct rte_event_dev_info evdev_info;
>> +	uint32_t service_id, caps;
>> +	int ret, i;
>> +
>> +	rte_event_dev_info_get(evt_rsrc->event_d_id, &evdev_info);
>> +	if (evdev_info.event_dev_cap  &
>RTE_EVENT_DEV_CAP_DISTRIBUTED_SCHED) {
>> +		ret = rte_event_dev_service_id_get(evt_rsrc-
>>event_d_id,
>> +				&service_id);
>> +		if (ret != -ESRCH && ret != 0)
>> +			rte_exit(EXIT_FAILURE,
>> +				 "Error in starting eventdev service\n");
>> +		l3fwd_service_enable(service_id);
>> +	}
>> +
>> +	for (i = 0; i < evt_rsrc->rx_adptr.nb_rx_adptr; i++) {
>> +		ret = rte_event_eth_rx_adapter_caps_get(evt_rsrc-
>>event_d_id,
>> +				evt_rsrc->rx_adptr.rx_adptr[i], &caps);
>> +		if (ret < 0)
>> +			rte_exit(EXIT_FAILURE,
>> +				 "Failed to get Rx adapter[%d] caps\n",
>> +				 evt_rsrc->rx_adptr.rx_adptr[i]);
>> +		ret = rte_event_eth_rx_adapter_service_id_get(
>> +				evt_rsrc->event_d_id,
>> +				&service_id);
>> +		if (ret != -ESRCH && ret != 0)
>> +			rte_exit(EXIT_FAILURE,
>> +				 "Error in starting Rx adapter[%d]
>service\n",
>> +				 evt_rsrc->rx_adptr.rx_adptr[i]);
>> +		l3fwd_service_enable(service_id);
>> +	}
>> +
>> +	for (i = 0; i < evt_rsrc->tx_adptr.nb_tx_adptr; i++) {
>> +		ret = rte_event_eth_tx_adapter_caps_get(evt_rsrc-
>>event_d_id,
>> +				evt_rsrc->tx_adptr.tx_adptr[i], &caps);
>> +		if (ret < 0)
>> +			rte_exit(EXIT_FAILURE,
>> +				 "Failed to get Rx adapter[%d] caps\n",
>> +				 evt_rsrc->tx_adptr.tx_adptr[i]);
>> +		ret = rte_event_eth_tx_adapter_service_id_get(
>> +				evt_rsrc->event_d_id,
>> +				&service_id);
>> +		if (ret != -ESRCH && ret != 0)
>> +			rte_exit(EXIT_FAILURE,
>> +				 "Error in starting Rx adapter[%d]
>service\n",
>> +				 evt_rsrc->tx_adptr.tx_adptr[i]);
>> +		l3fwd_service_enable(service_id);
>> +	}
>> +}
>> +
>>  int
>>  main(int argc, char **argv)
>>  {
>> @@ -869,6 +956,8 @@ main(int argc, char **argv)
>>  	evt_rsrc->port_mask = enabled_port_mask;
>>  	/* Configure eventdev parameters if user has requested */
>>  	l3fwd_event_resource_setup(&port_conf);
>> +	if (evt_rsrc->enabled)
>> +		goto skip_port_config;
>
>Please try to avoid introducing more gotos.
>If init code below is poll mode specific, let's move it int a separate
>function.
>Then we can have something like:
>If (evt_rsrc->enabled)  {
>  ...
>  ret =  l3fwd_event_resource_setup(...);
>  l3fwd_event_service_setup();
> ...
>} else
>   ret = l3fwd_poll_resource_setup(...);
>
>...
>

Sure, if we are ok to change/mode existing l3fwd code it makes things a lot 
easier.

>>
>>  	if (check_lcore_params() < 0)
>>  		rte_exit(EXIT_FAILURE, "check_lcore_params
>failed\n");
>> @@ -1054,6 +1143,7 @@ main(int argc, char **argv)
>>  		}
>>  	}
>>
>> +skip_port_config:
>>  	printf("\n");
>>
>>  	/* start ports */
>> @@ -1083,6 +1173,9 @@ main(int argc, char **argv)
>>  		}
>>  	}
>>
>> +	if (evt_rsrc->enabled)
>> +		l3fwd_event_service_setup();
>> +
>>  	printf("\n");
>>
>>  	for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
>> --
>> 2.17.1