sys/netgraph/ng_ppp.c

202 	uint32_t		latency;	/* calculated link latency */
323 static int	ng_ppp_intcmp(void *latency, const void *v1, const void *v2);
2183  * on each link's latency, bandwidth, and calculated additional latency.
2184  * The latter quantity is the additional latency caused by previously
2188  * same latency and bandwidth values.
2196  * latency l_i (in miliseconds). Consider the function function f_i(t)
2201  * Note that the y-intersect is always <= zero because latency can't be
2208  * At any given time, each link has some additional latency a_i >= 0
2211  * the previous latency value, the number of bytes written, and the
2215  * sorted by latency, so that l_i <= l_{i+1}.
2245  * may not get any bytes because their latency is too high.
2249  * important total bundle latency is (e.g., for interactive response time),
2254  * Since latency is measured in miliseconds, the "resolution" of this
2258  * same latency and bandwidth.
2264 	int latency[NG_PPP_MAX_LINKS];
2287 		/* Start with base latency value */
2289 		latency[activeLinkNum] = alink->latency;
2292 		/* Any additional latency? */
2315 			latency[activeLinkNum] +=
2319 	/* Sort active links by latency */
2321 	    priv->numActiveLinks, sizeof(*sortByLatency), latency, ng_ppp_intcmp);
2329 			flowTime = latency[sortByLatency[numFragments]]
2330 			    - latency[sortByLatency[i]];
2344 		topSum += latency[sortByLatency[i]] * bw;	/* / 100 */
2355 		    (bw * (t0 - latency[sortByLatency[i]]) + 50) / 100;
2405 ng_ppp_intcmp(void *latency, const void *v1, const void *v2)
2410 	return ((int *)latency)[index1] - ((int *)latency)[index2];
2483 	/* Increase latency for each link an amount equal to one MP header */
2495 			priv->links[i].latency =
2496 			    priv->links[i].conf.latency +
2517 			if (link->latency != link0->latency
2584 		if (newConf->links[i].latency > NG_PPP_MAX_LATENCY)