On 1/30/14, 12:53 AM, "Koehrer Mathias (ETAS/ESW5)" <[email protected]> wrote:
>Hi all, > >I am very new in using linuxptp. >I want to synchronize two PC using a separate point-to-point Ethernet >connection between both PCs. >This Ethernet connection is used only for PTP, any other network traffic >is routed via another NIC. > >Kernel 3.2.48-rt69 (RT_PREEMPT patch). >I use the Intel Gigabit CT Desktop adapter (82574L). >For this is use the latest e1000e driver (Version 2.5.4) and build it >outside the kernel to have the PTP support. >One of the PCs (PCA) runs using 64 bit kernel, the other PC (PCB) runs >using a 32 bit kernel. >linux-ptp version 1.3. > >On PCA I start the following commands: ># ./ptp4l -i eth1 -p /dev/ptp1 -m -H -P >and after a couple of seconds: ># ./phc2sys -s /dev/ptp1 -w -m > >On PCB I do the very same (unless I have to use /dev/ptp0 here). > >This works really fine for a while. However after a while the value of >phc explodes dramatically. >The value will be -35192325800 which looks like a kind of value overrun! >In hex this is 0xFFFFFFF7CE5FB958. >Please see the logfiles below. >What could be the issue for that?!? > >Thanks for any feedback on this! > >Regards > >Mathias Mathias, Thanks for your report on this! We've had a few reports of this now and are investigating it internally. We currently believe we may have a hardware bug on 82574L where some reads of the device clock are corrupted. We are testing a workaround now and will be submitting the patch upstream once it has passed our internal validation. Cheers, Matthew Matthew Vick Linux Development Networking Division Intel Corporation ------------------------------------------------------------------------------ WatchGuard Dimension instantly turns raw network data into actionable security intelligence. It gives you real-time visual feedback on key security issues and trends. Skip the complicated setup - simply import a virtual appliance and go from zero to informed in seconds. http://pubads.g.doubleclick.net/gampad/clk?id=123612991&iu=/4140/ostg.clktrk _______________________________________________ Linuxptp-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linuxptp-users
