netdev - Re: [PATCH iproute2-next 3/3] q_netem: slotting with non-uniform distribution

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Date:   Sun, 12 Aug 2018 16:18:05 -0600
From:   David Ahern <dsahern@...il.com>
To:     Yousuk Seung <ysseung@...gle.com>, netdev@...r.kernel.org
Cc:     Stephen Hemminger <stephen@...workplumber.org>,
        Michael McLennan <nefario@...gle.com>,
        Priyaranjan Jha <priyarjha@...gle.com>,
        Neal Cardwell <ncardwell@...gle.com>,
        Dave Taht <dave.taht@...il.com>
Subject: Re: [PATCH iproute2-next 3/3] q_netem: slotting with non-uniform
 distribution

On 8/6/18 11:09 AM, Yousuk Seung wrote:

> @@ -417,21 +421,53 @@ static int netem_parse_opt(struct qdisc_util *qu, int argc, char **argv,
>  				}
>  			}
>  		} else if (matches(*argv, "slot") == 0) {
> -			NEXT_ARG();
> -			present[TCA_NETEM_SLOT] = 1;
> -			if (get_time64(&slot.min_delay, *argv)) {
> -				explain1("slot min_delay");
> -				return -1;
> -			}
>  			if (NEXT_IS_NUMBER()) {
>  				NEXT_ARG();
> -				if (get_time64(&slot.max_delay, *argv)) {
> -					explain1("slot min_delay max_delay");
> +				present[TCA_NETEM_SLOT] = 1;
> +				if (get_time64(&slot.min_delay, *argv)) {
> +					explain1("slot min_delay");
> +					return -1;
> +				}
> +				if (NEXT_IS_NUMBER()) {
> +					NEXT_ARG();
> +					if (get_time64(&slot.max_delay, *argv)) {
> +						explain1("slot min_delay max_delay");
> +						return -1;
> +					}
> +				}
> +				if (slot.max_delay < slot.min_delay)
> +					slot.max_delay = slot.min_delay;
> +			} else {
> +				NEXT_ARG();
> +				if (strcmp(*argv, "distribution") == 0) {
> +					present[TCA_NETEM_SLOT] = 1;
> +					NEXT_ARG();
> +					slot_dist_data = calloc(sizeof(slot_dist_data[0]), MAX_DIST);

if (!slot_dist_data) ...