Hi, Could you please help us out on a query regarding the use of non-zero correction field in PTP event frames? We are working on a 1588 solution with a setup involving transparent clock. The setup is essentially as follows:
1588_Master <===> E2E_TC <===> 1588_Slave We are running linuxptp on both master and slave. The master and slave are either PCs with Ubuntu OS or a Xilinx embedded system with linux. The transit time is getting added in the TC i.e. it updates the 8 byte correction field. Does linuxptp consider this field in delay computations? What config needs to be enabled for the same? When we tried this by updating the correction field (even if only with 1 ns), we observed a hang - there was no DelayResponse frame observed and the sync stopped in s2 stage. If the correction field is made zero again (dynamically in the TC), the sync resumes as expected. We have looked up other queries on delay correction on the mailing list but they were mostly static delays that can be handled in the kernel driver. This is specifically regarding the correction field (offset 8 bytes from PTPHDR, size 8 bytes) . Please suggest how to proceed. Regards, Harini ------------------------------------------------------------------------------ _______________________________________________ Linuxptp-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linuxptp-users
