Lines Matching +full:clock +full:- +full:skip
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19 <!-- #BeginDate format:En2m -->8-Aug-2014 19:17<!-- #EndDate -->
28 <p>This driver receives its reference clock info from a shared
29 memory-segment. The shared memory-segment is created with owner-only
31 ≥2. Units 0 and 1 are always created with owner-only access for
36 <h4>Structure of shared memory-segment</h4>
38 int mode; /* 0 - if valid is set:
41 * 1 - if valid is set:
61 <p>Each second, the value of <code>valid</code> of the shared memory-segment is checked:</p>
65 <p>Each second, <code>valid</code> in the shared memory-segment is checked:</p>
69 <h4>Mode-independent post-processing</h4>
76 <li>If the absolute difference between remote and local clock
90 The SHM driver was fixed (ntp-4.2.5p138) to collect data each second rather than
155 default for clock units 0 and 1; clock units >1 are mode
158 <td align="center">1-31</td>
159 <td align="center">-</td>
160 <td align="center">-</td>
161 <td><i>reserved -- do not use</i></td>
172 clock, in seconds. Values <1.0 or >86400.0 are ignored, and the
179 <dd><i>Skip</i> the difference limit check if set. Useful
181 long periods without power and the SHM clock must be able
182 to force long-distance initial jumps. <i>Check</i> the
203 mappings, where <i>u</i> is the clock unit. Private /
204 non-public mappings are created as
215 the clock unit. (This value could be hex-decoded as 'NTP0',
226 <p><i>NTPD</i> is started as root on most POSIX-like operating systems
230 clock setup. The actual polling of the clock is done as the run-time
232 create a SHM segment owned by the runtime-user account. The internal
246 <p><a href="../refclock.html">Reference Clock Drivers</a></p>