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Siheng Huang — Thu, 26 Jan 2017 22:05:15 -0000

From this reading, it looks like the LinuxPTP project implements the PTP client. Does it also implement PTP master code? If not, what are the goods source for PTP master code? Thanks!

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Wojciech Owczarek — Mon, 31 Aug 2015 10:46:55 -0000

The Debian package is maintained independently. The latest version of ptpd is always the recommended version - currently 2.3.1. Anything older should be upgraded.

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Michael Haberler — Mon, 31 Aug 2015 10:23:38 -0000

suggestion on the debian package - it works fine, but it lacks a .conf file to start from: https://packages.debian.org/sid/i386/ptpd/filelist

the ptp2.conf files from https://sourceforge.net/p/ptpd/code/HEAD/tree/trunk/src/ would make it simpler to get going

I lifted my ptpd.conf from there, had to disable some options because they were not supported in the deb version

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Michael Haberler — Mon, 31 Aug 2015 10:20:31 -0000

Wojciech - thanks - that was it!

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Wojciech Owczarek — Mon, 31 Aug 2015 09:47:27 -0000

PTPd populates the esterror field of the timex structure with the current offset from master. Any application can read it with ntp_gettime() or adjtimex(). You can also periodically read ptpd's status file and get the offset from there. As to the value of the threshold, well, there is no recipe for that.

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Michael Haberler — Mon, 31 Aug 2015 08:56:45 -0000

re API: in my application I would need access to the clock (I assume clock_gettime(..REALTIME) then) as well as an indication of the maximum time drift relative to the current master, with the intent to cause an emergency stop of the application if the clocks drift apart more than a certain threshold

how would I go about detecting this limit?

Home modified by George Neville-Neil

George Neville-Neil — Wed, 12 Jun 2013 18:56:57 -0000

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 The PTP daemon (PTPd) implements the Precision Time protocol (PTP) as defined by the IEEE 1588 standard. PTP was developed to provide very precise time coordination of LAN connected computers.

-[[project_admins]]
 [[members]]
 [[download_button]]

Home modified by George Neville-Neil

George Neville-Neil — Wed, 12 Jun 2013 18:56:36 -0000

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 The PTP daemon (PTPd) implements the Precision Time protocol (PTP) as defined by the IEEE 1588 standard. PTP was developed to provide very precise time coordination of LAN connected computers.
-[[project_screenshots]]
+
 [[project_admins]]
+[[members]]
 [[download_button]]

Home modified by George Neville-Neil

George Neville-Neil — Wed, 12 Jun 2013 18:54:26 -0000

--- v6
+++ v7
@@ -67,3 +67,7 @@
 [Meinberg](http://www.meinbergglobal.com)
 [Spectracom](http://www.spectracomcorp.com)
 [Symmetricom](http://www.symmetricom.com)
+
+* What are you planning for upcoming releases?
+
+[DevelopmentPlans]

Home modified by George Neville-Neil

George Neville-Neil — Wed, 03 Apr 2013 14:38:09 -0000

--- v5
+++ v6
@@ -66,4 +66,4 @@
 [EndRun](http://www.endruntechnologies.com)
 [Meinberg](http://www.meinbergglobal.com)
 [Spectracom](http://www.spectracomcorp.com)
-[Symmetricom](http://www.spectracomcorp.com)
+[Symmetricom](http://www.symmetricom.com)