On 2018-06-27 12:56, Pintu Kumar wrote: > Dear Jan, > >> What means "now"? Did it work before? What was the setup then? > rtnet loopback test is working (even with older kernel) on my Virtual > Box with Ubuntu 32-bit. > > But it never worked for me on x86_64 machine. > So, at first I wonder what is the minimum criteria to make rtnet work > on any system. > I am sure it would have definitely worked in the past. No?
It surely worked, but it wasn't looked after consistently in the (even not so) recent past since then. > >> Either you drill deeper, systematically, and report your >> findings for discussions and suggestions on the list > Yes sure, I am ready to do that. > Once I know the little bit of history and current problems with rtnet, > I can definitely start contributing. > At first I assumed that there might be some fix already available. > So, instead of reinventing the wheel, I thought to first check out. The main recent problem was (and still is) related to SMAP (supervisor mode access prevention) which started to bite RTnet due to its sloppy way of taken data from user space or pushing it back there (not using proper copy-to/from services). The problem in the UDP code you ran into is related to the code still doing direct access (checksum generation over userspace data, rather than over the kernel copy). With nosmap, that particular issue should no longer occur (at least as long as we can ask the kernel for this relaxation), so I suspect the other effect you see now is something else. Jan > > I am really sorry for troubling you! > I will try to look into this issue and see if I can find something. > > Thank you! > Pintu > > On Wed, Jun 27, 2018 at 3:50 PM Jan Kiszka <[email protected]> wrote: >> >> On 2018-06-26 13:08, Pintu Kumar wrote: >>> Dear Jan, >>> >>> Till now I haven't had any success for running my rtnet demo test >>> either or x86 or arm. >>> I even upgraded to xenomai-next (both kernel and user space) but still no >>> luck. >>> >>> Now even the "loopback" test is not working on xenomai-next. >> >> What means "now"? Did it work before? What was the setup then? >> >>> >>> Can you confirm, if any of the below rtnet test works for you with >>> Kernel 4.9 and xenomai-next. >>> - xenomai-3-next/testsuite/smokey/net_udp >>> - url = https://git.code.sf.net/p/rtnet/code => examples/generic/ >>> - Or a simple UDP client/server program, compiled with xenomai posix skin >>> >>> I already tried with "nosmap" but there are no response coming (I am >>> getting no prints on console, but client is terminated). >>> If there is any work around to make rtnet works, please let me know. >>> >> >> I'm afraid there is currently a lack of bandwidth here to dive into the >> details. Either you drill deeper, systematically, and report your >> findings for discussions and suggestions on the list, or you need to be >> patient until someone finds the time to reproduce and resolve the issue(s). >> >> Jan >> >> -- >> Siemens AG, Corporate Technology, CT RDA IOT SES-DE >> Corporate Competence Center Embedded Linux -- Siemens AG, Corporate Technology, CT RDA IOT SES-DE Corporate Competence Center Embedded Linux _______________________________________________ Xenomai mailing list [email protected] https://xenomai.org/mailman/listinfo/xenomai
