Hi,
There are so many reasons that could happen.
At first, are you sure , your xenomai system has not any jitter involved
? And how have you checked it ?
Regards,
S.Ancelot
On 26/05/2014 11:16, Mariusz Janiak wrote:
> Dear all,
>
> We are looking for a person who is able to update the rt_e1000e driver to
> make it supporting the newer Intel NIC like 82574L, 82579LM, 82567V correctly
> under the Xenomai 2.6.3 with a kernel at least 3.8.13 or newer. The problem
> is following, while RTnet modules and drivers load correctly without any
> warnings, NIC is not able to send ethernet frames for some random time.
> During that time, RTnet stack report that is not able to transmit
> synchronization frame ("TDMA: Failed to transmit sync
> frame!"), the rt_e1000e driver reset device several times, and two leds
> integrated with connector are not blinking. After a while, device start to
> operate normally, sync frame are sending normally, and there is no further
> issues. The main problem is, that we don't know when RTnet stack start to
> work, so we have to wait unpredictable period of time. Also just after NIC
> start sending sync frames, it has buffered several old ones, so it send them
> one ofter another as fast as possible, what make
> problem for our custom devices during synchronization phase. Currently, we
> observe similar non acceptable behavior on following machines:
> - Supermicro MBD-X9SPV-M4-3QE-O,
> - Advantech PCM-3363D-1GS8A1E,
> - Commel Mini-ITX Motherboard LV-67C.
> with latest RTnet git version, Xenomai 2.6.3, kernel 3.8.13 and Ubuntu 12.04.
>
> We expect that an involved person should prepare a patch which remove
> described issues and applies cleanly to the latest RTnet git version. The
> patch should be available for a community on the same license as RTnet stack.
> Patch will be tested on listed devices.
>
> We offer a contract to perform a specified task, one of the parties will be
>
> Wroclaw University of Technology
> Wybrzeże Wyspiańskiego 27
> 50-370 Wrocław
> tel. 71 320 26 00
> NIP: 896-000-58-51
> REGON: 000001614
> www.pwr.edu.pl
>
> Please send your letter of application including, short CV, expected salary
> (EUR or PLN) and estimated time period required for patch preparation, to
>
> Mariusz Janiak
> Chair of Cybernetics and Robotics,
> Wroclaw University of Technology
> Janiszewskiego 11/17,
> Wroclaw, Poland,
> tel: +48 71 320 26 44
> email: mariusz.jan...@pwr.edu.pl
>
> Best regards,
> Mariusz
>
>
>
>
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