On Wed, Feb 25, 2015 at 05:47:12PM -0800, Gary E. Miller wrote: > I'm trying to make this real simple. :-) > > So, if HWTSTAMP_TX_ON is present, can I know the NIC should be supported > for hardware time?
Simple answer: Pick a card that offers HWTSTAMP_TX_ON and HWTSTAMP_FILTER_V2_EVENT. > Agreed. But the php2sys failure always happens in under 60 seconds and > I could never get the failure to happen with just ptp4l. Since I could > never duplicate the failure in ptp4l mode nothing to show. @Jason: Got private email this week from another person using the I217-LM. Here is what they wrote: The offset all of a sudden jumps be 40000+ seconds. I would think that if it was an issue with just reading the timer that the servo would help throw out spurious values like that, so I suspect we are somehow actually corrupting the timer. We wrote our own little test program that only calls get time on the PTP timer, and when we call it more frequently than 1us is when we really start corrupting the timer with a vengeance. So that gives a clear cut test case that triggers the bug. Thanks, Richard ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Linuxptp-devel mailing list Linuxptp-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-devel
