Lines Matching +full:quality +full:- +full:of +full:- +full:service
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17 <h4>Table of Contents</h4>
21 <li class="inline"><a href="#quality">3. Quality of Service</a></li>
28 …<li>Nominal estimate of the server clock time relative to the client clock time. This is called <e…
29 …<li>Roundtrip system and network delay measured by the on-wire protocol. This is call <em>roundtri…
31 …li>Expected error, consisting of the root mean square (RMS) nominal clock offset sample difference…
38 …ented in boxes labeled Peer are computed by the on-wire protocol, as described below. The algorith…
40 …-wire protocol, as described on the <a href="warp.html">How NTP Works</a> page. In addition, the d…
42 …<p>Note. In very fast networks where the client clock frequency is not within 1 PPM or so of the t…
44 …of eight (offset, delay, dispersion) samples, the algorithm described on the <a href="filter.html"…
45 …il the source is no longer reachable. Reachability is determined by an eight-bit shift register, w…
46 …of the source population and the system peer selection is redetermined as each update from each so…
47 …. Once the peer variables for a source have been selected, older variables of the same or other so…
49 <h4 id="quality">3. Quality of Service</h4>
50 …ning the clock offset estimate. Root distance represents the maximum error of the estimate due to …
51 …-half the <em> root delay</em> of the primary source of time; i.e., the reference clock, plus the …
53 …of the above computation and a <em>minimum threshold.</em> The minimum threshold defaults to 1 ms,…
55 …of the <a href="miscopt.html#tos"><tt>tos</tt></a> command. When an upstream server loses all sour…
58 …<li>Root distance defines the maximum error of the clock offset estimate due to all causes as long…
59 …of the correctness interval. This interval represents the maximum clock offset for each of possibl…
61 …<li>The (normalized) reciprocal of the root distance is used as a weight factor by the combine alg…
64 …of the various available sources. The strategy is to select the system peer as the source with the…
65 …-likelihood estimate of the system clock offset, while system jitter, also called estimated error,…
66 <p>The maximum system error, or <em>system distance</em>, is computed as one-half the system delay …