Chandra, Your question has nothing to do with linuxptp (user space stack) or even with the Linux kernel, and as such it is off topic for this list.
Having said that, I cannot resist offering an opinion... > A simple solution is timestamping all the packets and making the dma > flow uniform to all the packets - ptp and non-ptp regular packets, > where each packet's timestamp whether needed or not for the ptp4l > stack will be stored in the hardware fifo. IMHO this is only reasonable approach for modern MAC hardware. Just write the time stamp into the packet descriptor and be done with it. It is just eight bytes, after all. No two threads, no packet parsing or alternate paths. KISS. Also, precise time stamps are useful to other applications beyond PTP, and so making PTP frames into a special case is artificially limiting the usefulness of your HW. > It can lead to overflow due to slower turnaround from the driver or Nonsense. The driver must read the descriptor in any case, and it will only handle the time stamp if the option is enabled. > in the worst case slow down the link losing the throughput. again, you can have a descriptor bit that tells whether to copy the time stamp back or not. Just my 2 cents, Richard ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
