Re: Cannot get basic latency test to work on Intel platform

Hi Asier,

> On Feb 27, 2017, at 3:20 AM, Asier <[email protected]> wrote:
> 
> Hi Bill,
> 
> The hangs you mention, well could be similar to the ones I was experiencing related with Ubuntu console terminal. Could you try launching the tests from within the tty1-6 terminal consoles or from "xterm" console instead of the default ubuntu terminal console?
> 
> If this works,probably in the latest Vulcano CVS you will find the issue fixed.    

Thank you for the suggestion. I did try it with xterm but found the same behavior.

> 
> Asier.
> 
> 
> On Mon, Feb 27, 2017 at 10:22 AM, Paolo Mantegazza <[email protected] <mailto:[email protected]>> wrote:
> Retry the latest Vulcano CVS.. LIkely it will change nothing, but just to know.
> In any case before trying any test watch first what happens when you work for a bit of time with Linux after having insmoded rtai_hal.ko.

Paolo, thank you for your response as well.

I got the latest from the Vulcano repository, but as you suspected, it did not change the result.
If I just generally use the system after only insmodding rtai_hal.ko, the system seems to be
stable. It is not until I try to insmod rtai_sched.ko that it hangs during insmod.

> Did you try it on machine that was running RTAI well already?

I have not. Our previous use of RTAI was with the 2.6.32 kernel on older hardware.

Best regards,
Bill


> Paolo.
> 
> 
> On 02/27/2017 07:29 AM, Bill Jenkins wrote:
> Hi Everyone,
> 
> I have been trying to get RTAI up and running with the latest rtai-5.0-test2
> running on a patched 4.1.18 kernel on Intel processors. It seems to me
> that this should work, as there is nothing special I am trying to do yet
> other than just run the latency test in the test suite.
> 
> There must be something I am not doing correctly, because it always fails
> the same way and I have tried this on several different motherboards (processors
> I've tried so far include Atom x5, i3, and 3160 braswell).
> 
> After patching the kernel and doing the install of rtai, the system always hangs
> when I try to run the kern/latency/run test. The hang happens when insmod'ing
> rtai_sched.
> 
> Here are the basic steps I've tried on each system:
> 
> 1. Install Ubuntu 16.10 (I've also had this problem with Ubuntu 14.04)
> 2. Install gcc/g++ 4.9
> 3. Get 4.1.18 kernel from kernel.org <http://kernel.org/>, configure it using localmodconfig, and then
>         build/install it and reboot into 4.1.18.
> 4. Get RTAI 5.0-test2 and patch the 4.1.18 kernel with it.
> 5. Build/install patched 4.1.18 and reboot into the patched 4.1.18 kernel.
> 6. I take the default configuration values in RTAI, with the exception of changing
>         the number of CPUs to 4. Then build/install RTAI.
> 7. Try to run the testsuite/kern/latency test and the system hangs.
> 
> Anyone know what I might be missing? I can't imagine that such a simple
> case on Intel processors does not work.
> 
> Thanks in advance for any help,
> Bill
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