[dpdk-dev] [PATCH v3 4/8] eal: change specific log levels at startup

Tan, Jianfeng jianfeng.tan at intel.com
Fri Apr 14 07:33:49 CEST 2017


Hi Olivier,

If I understand it correctly, this patch is to shift log level setting 
earlier. But we did not remove the one in eal_parse_common_option(). So 
we can see this parameter will be analyzed twice. Does it make sense to 
remove analysis of log level in eal_parse_common_option()?

Thanks,
Jianfeng

On 4/5/2017 12:40 AM, Olivier Matz wrote:
> Example of use:
>    ./app/test-pmd --log-level='pmd\.i40e.*,8'
>
>    This enables debug logs for all dynamic logs whose type starts with
>    'pmd.i40e'.
>
> Signed-off-by: Olivier Matz <olivier.matz at 6wind.com>
> ---
>   lib/librte_eal/bsdapp/eal/eal.c            |  4 +--
>   lib/librte_eal/common/eal_common_options.c | 49 +++++++++++++++++++++++-------
>   lib/librte_eal/linuxapp/eal/eal.c          |  4 +--
>   3 files changed, 40 insertions(+), 17 deletions(-)
>
> diff --git a/lib/librte_eal/bsdapp/eal/eal.c b/lib/librte_eal/bsdapp/eal/eal.c
> index 4ee9c66fe..fae6c7e0a 100644
> --- a/lib/librte_eal/bsdapp/eal/eal.c
> +++ b/lib/librte_eal/bsdapp/eal/eal.c
> @@ -519,10 +519,8 @@ rte_eal_init(int argc, char **argv)
>   
>   	thread_id = pthread_self();
>   
> -	eal_log_level_parse(argc, argv);
> -
>   	/* set log level as early as possible */
> -	rte_set_log_level(internal_config.log_level);
> +	eal_log_level_parse(argc, argv);
>   
>   	if (rte_eal_cpu_init() < 0) {
>   		rte_eal_init_alert("Cannot detect lcores.");
> diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c
> index f36bc5568..606695a7f 100644
> --- a/lib/librte_eal/common/eal_common_options.c
> +++ b/lib/librte_eal/common/eal_common_options.c
> @@ -739,25 +739,53 @@ eal_parse_syslog(const char *facility, struct internal_config *conf)
>   }
>   
>   static int
> -eal_parse_log_level(const char *level, uint32_t *log_level)
> +eal_parse_log_level(const char *arg, struct internal_config *conf)
>   {
> -	char *end;
> +	char *end, *str, *type, *level;
>   	unsigned long tmp;
>   
> +	str = strdup(arg);
> +	if (str == NULL)
> +		return -1;
> +
> +	if (strchr(str, ',') == NULL) {
> +		type = NULL;
> +		level = str;
> +	} else {
> +		type = strsep(&str, ",");
> +		level = strsep(&str, ",");
> +	}
> +
>   	errno = 0;
>   	tmp = strtoul(level, &end, 0);
>   
>   	/* check for errors */
>   	if ((errno != 0) || (level[0] == '\0') ||
> -	    end == NULL || (*end != '\0'))
> -		return -1;
> +		    end == NULL || (*end != '\0'))
> +		goto fail;
>   
>   	/* log_level is a uint32_t */
>   	if (tmp >= UINT32_MAX)
> -		return -1;
> +		goto fail;
> +
> +	printf("set log level %s,%lu\n",
> +		type, tmp);
> +
> +	if (type == NULL) {
> +		conf->log_level = tmp;
> +		rte_set_log_level(tmp);
> +	} else if (rte_log_set_level_regexp(type, tmp) < 0) {
> +		printf("cannot set log level %s,%lu\n",
> +			type, tmp);
> +		goto fail;
> +	}
>   
> -	*log_level = tmp;
> +	free(str);
>   	return 0;
> +
> +fail:
> +	free(str);
> +	return -1;
>   }
>   
>   static enum rte_proc_type_t
> @@ -898,15 +926,12 @@ eal_parse_common_option(int opt, const char *optarg,
>   		break;
>   
>   	case OPT_LOG_LEVEL_NUM: {
> -		uint32_t log;
> -
> -		if (eal_parse_log_level(optarg, &log) < 0) {
> +		if (eal_parse_log_level(optarg, conf) < 0) {
>   			RTE_LOG(ERR, EAL,
>   				"invalid parameters for --"
>   				OPT_LOG_LEVEL "\n");
>   			return -1;
>   		}
> -		conf->log_level = log;
>   		break;
>   	}
>   	case OPT_LCORES_NUM:
> @@ -1057,7 +1082,9 @@ eal_common_usage(void)
>   	       "  --"OPT_VMWARE_TSC_MAP"    Use VMware TSC map instead of native RDTSC\n"
>   	       "  --"OPT_PROC_TYPE"         Type of this process (primary|secondary|auto)\n"
>   	       "  --"OPT_SYSLOG"            Set syslog facility\n"
> -	       "  --"OPT_LOG_LEVEL"         Set default log level\n"
> +	       "  --"OPT_LOG_LEVEL"=<int>   Set global log level\n"
> +	       "  --"OPT_LOG_LEVEL"=<type-regexp>,<int>\n"
> +	       "                      Set specific log level\n"
>   	       "  -v                  Display version information on startup\n"
>   	       "  -h, --help          This help\n"
>   	       "\nEAL options for DEBUG use only:\n"
> diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
> index f0ded185b..d98d56d2f 100644
> --- a/lib/librte_eal/linuxapp/eal/eal.c
> +++ b/lib/librte_eal/linuxapp/eal/eal.c
> @@ -776,10 +776,8 @@ rte_eal_init(int argc, char **argv)
>   
>   	thread_id = pthread_self();
>   
> -	eal_log_level_parse(argc, argv);
> -
>   	/* set log level as early as possible */
> -	rte_set_log_level(internal_config.log_level);
> +	eal_log_level_parse(argc, argv);
>   
>   	if (rte_eal_cpu_init() < 0) {
>   		rte_eal_init_alert("Cannot detect lcores.");



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