On Sun, Feb 22, 2015 at 01:11:12PM -0800, Gary E. Miller wrote: > No. I noticed how the Redhat HOWTO specifies all three needed. That > should be in the linuxptp README.
Good point. > > PTP doesn't work well anyhow over wifi because of the unpredicable > > transmission scheme. > > Can it be worse than just plain old NTP? I would think it can, depending on the PI weights. > Sadly no luck getting phc2sys to work for me on a system already > running ptp4l. I change time_stamping software to hardware and run this: > > kong ~ # phc2sys -a -m -l 7 This would be without ntpshm. > phc2sys[880.851]: PI servo: sync interval 1.000 kp 0.700 ki 0.300000 > phc2sys[881.852]: reconfiguring after port state change > phc2sys[881.852]: master clock not ready, waiting... For a simple run without ntpshm, try this: phc2sys -a -r -i eth0 -m -q -a automatic mode -r include system clock as a possible slave -i interface that ptp4l is running on -m messages to stdout/stderr -q no messages to syslog > I looked at doing manual settings and go confused. Like what to set > for -M? Same as ptp4l or unique? So, backing up a bit, when using hardware time stamping, the ptp4l servo should never be set to ntpshm. That is only for software time stamping. For a HW time stamping setup, I would run ptp4l with defaults, and then phc2sys like so. phc2sys -s eth0 -E ntpshm -m -q The -M value only has to agree with your ntp setup. Miroslav? I admit the options for phc2sys are really confusing. On the one hand, the phc2sys underwent a "organic" development process, and on the other hand, there really are a great many ways to configure the system clock and one (or more!) PTP hardware clocks. I always have to re-read the man page every time. > Got my system clock off by 24 hours > and gave up... Oops. Sorry, Richard ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=190641631&iu=/4140/ostg.clktrk _______________________________________________ Linuxptp-devel mailing list Linuxptp-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-devel
