[dpdk-dev] [PATCH] service: add corelist to EAL arguments

[Ananyev, Konstantin]

Hi Harry,

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Harry van Haaren
> Sent: Monday, July 17, 2017 4:22 PM
> To: dev at dpdk.org
> Cc: thomas at monjalon.net; jerin.jacob at caviumnetworks.com; Van Haaren, Harry <harry.van.haaren at intel.com>
> Subject: [dpdk-dev] [PATCH] service: add corelist to EAL arguments
> 
> This commit allows the -S (captial 's') to be used to indicate
> a corelist for Services. This is a "nice to have" patch, and does
> not modify any of the service core functionality.
> 
> Suggested-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
> Suggested-by: Thomas Monjalon <thomas at monjalon.net>
> Signed-off-by: Harry van Haaren <harry.van.haaren at intel.com>
> ---
>  lib/librte_eal/common/eal_common_options.c | 74 ++++++++++++++++++++++++++++++
>  1 file changed, 74 insertions(+)
> 
> diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c
> index 00265d6..696a627 100644
> --- a/lib/librte_eal/common/eal_common_options.c
> +++ b/lib/librte_eal/common/eal_common_options.c
> @@ -65,6 +65,7 @@ eal_short_options[] =
>  	"d:" /* driver */
>  	"h"  /* help */
>  	"l:" /* corelist */
> +	"S:" /* service corelist */
>  	"m:" /* memory size */
>  	"n:" /* memory channels */
>  	"r:" /* memory ranks */
> @@ -402,6 +403,72 @@ eal_parse_coremask(const char *coremask)
>  }
> 

Do we need a new parsing function here?
Can't we reuse at least part of '-l' parsing code?
Konstantin

>  static int
> +eal_parse_service_corelist(const char *corelist)
> +{
> +	struct rte_config *cfg = rte_eal_get_configuration();
> +	int i, idx = 0;
> +	unsigned count = 0;
> +	char *end = NULL;
> +	int min, max;
> +
> +	if (corelist == NULL)
> +		return -1;
> +
> +	/* Remove all blank characters ahead and after */
> +	while (isblank(*corelist))
> +		corelist++;
> +	i = strlen(corelist);
> +	while ((i > 0) && isblank(corelist[i - 1]))
> +		i--;
> +
> +	/* Get list of cores */
> +	min = RTE_MAX_LCORE;
> +	do {
> +		while (isblank(*corelist))
> +			corelist++;
> +		if (*corelist == '\0')
> +			return -1;
> +		errno = 0;
> +		idx = strtoul(corelist, &end, 10);
> +		if (errno || end == NULL)
> +			return -1;
> +		while (isblank(*end))
> +			end++;
> +		if (*end == '-') {
> +			min = idx;
> +		} else if ((*end == ',') || (*end == '\0')) {
> +			max = idx;
> +			if (min == RTE_MAX_LCORE)
> +				min = idx;
> +			for (idx = min; idx <= max; idx++) {
> +				if (cfg->lcore_role[idx] != ROLE_SERVICE) {
> +					/* handle master lcore already parsed */
> +					uint32_t lcore = idx;
> +					if (cfg->master_lcore == lcore &&
> +							master_lcore_parsed) {
> +						RTE_LOG(ERR, EAL,
> +							"Error: lcore %u is master lcore, cannot use as service core\n",
> +							idx);
> +						return -1;
> +					}
> +					lcore_config[idx].core_role =
> +							ROLE_SERVICE;
> +					count++;
> +				}
> +			}
> +			min = RTE_MAX_LCORE;
> +		} else
> +			return -1;
> +		corelist = end + 1;
> +	} while (*end != '\0');
> +
> +	if (count == 0)
> +		return -1;
> +
> +	return 0;
> +}
> +
> +static int
>  eal_parse_corelist(const char *corelist)
>  {
>  	struct rte_config *cfg = rte_eal_get_configuration();
> @@ -912,6 +979,13 @@ eal_parse_common_option(int opt, const char *optarg,
>  			return -1;
>  		}
>  		break;
> +	/* service corelist */
> +	case 'S':
> +		if (eal_parse_service_corelist(optarg) < 0) {
> +			RTE_LOG(ERR, EAL, "invalid service core list\n");
> +			return -1;
> +		}
> +		break;
>  	/* size of memory */
>  	case 'm':
>  		conf->memory = atoi(optarg);
> --
> 2.7.4