netdev - Re: [next-queue PATCH v6 3/5] net/sched: Introduce Credit Based Shaper (CBS) qdisc

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Message-ID: <1507771972.31614.41.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Wed, 11 Oct 2017 18:32:52 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Vinicius Costa Gomes <vinicius.gomes@...el.com>
Cc:     netdev@...r.kernel.org, intel-wired-lan@...ts.osuosl.org,
        jhs@...atatu.com, xiyou.wangcong@...il.com, jiri@...nulli.us,
        andre.guedes@...el.com, ivan.briano@...el.com,
        jesus.sanchez-palencia@...el.com, boon.leong.ong@...el.com,
        richardcochran@...il.com, henrik@...tad.us, levipearson@...il.com,
        rodney.cummings@...com
Subject: Re: [next-queue PATCH v6 3/5] net/sched: Introduce Credit Based
 Shaper (CBS) qdisc

On Wed, 2017-10-11 at 17:54 -0700, Vinicius Costa Gomes wrote:
> This queueing discipline implements the shaper algorithm defined by
> the 802.1Q-2014 Section 8.6.8.2 and detailed in Annex L.

...

> +static s64 delay_from_credits(s64 credits, s32 slope)
> +{
> +	s64 rate = slope * BYTES_PER_KBIT;
> +
> +	if (unlikely(rate == 0))
> +		return S64_MAX;
> +
> +	return ((-credits * NSEC_PER_SEC) / rate);
> +}

Have you tried to compile this on 32bit arch ?

make ARCH=i386