Re: RTAI-5 make hangs at self-calibrate.

On 04/15/2016 11:25 AM, Felix Frey wrote:
> Just checked with latest Vulcano and kernel 3.18.22 on my AMD GX-210.
>
> Insmoding rtai_sched tells:
>
> [  191.152594] USERMODE CHECK: OK.
> [  191.152604] USERMODE CHECK PROVIDED (ns): KernelLatency -1, UserLatency -1.
> [  191.277545] KERNEL SPACE LATENCY ENDED AT CYCLE: 1243, LATENCY = 4271, VARIANCE = 33761/10004569, GAIN = 843651/1000000000, LEAST = 3520.
> [  191.357327] AFTER KERNEL CALIBRATION (WITH RTAI TASK, ns): KernelLatency 3526, UserLatency -1 (CALIBRATION: PERIOD 10000 (ns), TIME 204699629 (ns)).
> [  191.480609] USER SPACE LATENCY ENDED AT CYCLE: 1203, LATENCY = 4899.93, VARIANCE = 0.00352333, GAIN = 0.000880833, LEAST = 4634.
> [  191.482291] USERMODE USER SPACE CALIBRATION: OK.
> [  191.482300] AFTER USER CALIBRATION (ns): KernelLatency 3526, UserLatency 4642 (CALIBRATION: PERIOD 10000 (ns), TIME 124954629 (ns)).
> [  191.482306] FINAL CALIBRATION SUMMARY (ns): KernelLatency 3526, UserLatency 4642.
>
> Seems to be ok.
Yes it is, thanks for your patience in pursuing the check.
Paolo.
> Felix
>
>
>> I've no clue at the moment.
>> I just know that on my 3 test machines,  gcc ranging from 3.something to 4.something, ubunt 8.somenthing to 14.something, P III to XEON, I get the following diagnostic summary:
>> [  872.146524] USERMODE CHECK: OK.
>> [  872.146531] USERMODE CHECK PROVIDED (ns): KernelLatency -1, UserLatency -1.
>> [  872.271467] KERNEL SPACE LATENCY ENDED AT CYCLE: 1243, LATENCY = 5519, VARIANCE = 33761/10004569, GAIN = 843651/1000000000, LEAST = 5115.
>> [  872.348028] AFTER KERNEL CALIBRATION (WITH RTAI TASK, ns): KernelLatency 1698, UserLatency -1 (CALIBRATION: PERIOD 10000 (ns), TIME 201475012 (ns)).
>> [  872.477559] USER SPACE LATENCY ENDED AT CYCLE: 1203, LATENCY = 11950.4, VARIANCE = 0.00352333, GAIN = 0.000880833, LEAST = 11250.
>> [  872.496137] USERMODE USER SPACE CALIBRATION: OK.
>> [  872.496148] AFTER USER CALIBRATION (ns): KernelLatency 1698, UserLatency 3736 (CALIBRATION: PERIOD 10000 (ns), TIME 148104409 (ns)).
>> [  872.496152] FINAL CALIBRATION SUMMARY (ns): KernelLatency 1698, UserLatency 3736.
>> Figures can be differ for differing machines but I do not see why anything should hang.
>> Your listing shows that the kernel part has finished, while ps aux shows the user space part running, even if I do not see where /usr/realtime/calibration/latencies 216320 2600 comes from. In any case the user space part, with the defaul frequency and calibration cycles, cannot but last 1 second
>> What is the frequency of your CPU, something about I GHz? So
>>
>> Paolo.
>>
>> ________________________________________
>> From: Duane AW. Jeffery [[email protected]]
>> Sent: Thursday, April 14, 2016 7:24 PM
>> To: Paolo Mantegazza
>> Cc: '[email protected]'
>> Subject: RE: [Rtai] RTAI-5 make hangs at self-calibrate.
>>
>> Tried Vulcano just now, after some fiddling, I was able to get it to compile, but then trying to insmod rtai_sched.ko seems to hang the terminal.
>>
>> Checking with another terminal, the last few lines of dmesg are like:
>>
>> USERMODE CHECK: OK
>> USERMODE CHECK PROVIDED (ns): KernelLatency -1, UserLatency -1.
>> KERNEL SPACE LATENCY ENDED AT CYCLE: 1243, LATENCY = 3058, VARIANCE = 33761/10004569, GAIN = 843651/1000000000, LEAST = 2600.
>> AFTER KERNEL CALIBRATION (WITH RTAI TASK, ns): KernelLatency 1201, UserLatency -1 (CALIBRATION: PERIOD 10000 (ns), TIME 201353401 (ns)).
>>
>> Ps aux shows the following command running:
>>
>> /usr/realtime/calibration/calibrate /usr/realtime/calibration/latencies 216320 2600
>>
>> Any ideas?
>>
>> -Duane
>>
>> From: Paolo Mantegazza [mailto:[email protected]]
>> Sent: Thursday, April 14, 2016 7:03 AM
>> To: Duane AW. Jeffery <[email protected]>
>> Subject: Re: [Rtai] RTAI-5 make hangs at self-calibrate.
>>
>> My suggestion is that you try VULCANO CVS. It wil be released as 5.0 test2 next week or so.
>> One of the new things that come with it is exactly a new calibration procedure.
>> I got a check, witnessed on this list, by just one user but two or three more fedback to me privatly it worked.
>> So another check is welcomed.
>>
>> Paolo
>>
>> On 04/13/2016 10:28 PM, Duane AW. Jeffery wrote:
>> Hi all,
>>
>> I’m working on a new laptop (ASUS E402M) and trying to get RTAI to compile on it.
>>
>> I am running kernel 3.18.22 - updated into what is otherwise a Slackware 14.1 install.  I have applied the hal patch and successfully compiled and booted my patched linux kernel.
>>
>> When I go to my RTAI source tree, unpacked into /usr/src/<folder> symlinked to /usr/src/rtai and try to compile it (first make menuconfig to setup, and then make), it begins ok, and then gets to the part where it calls “/bin/sh ../../base/sched/selfcalibrate.sh x86”, and then it just hangs there forever.
>>
>> If I switch to another terminal, I can see that lsmod reports rtai_hal and rtai_tmpsched are loaded, and then that dmesg shows some messages that look ok from both the rtai_hal module and the rtai_tmpsched module.  Checking ps aux shows that the selfcalibrate.sh script is still running, and has called “/usr/src/rtai/base/arch/x86/calibration/.libs/lt-calibrate ../arch/x86/hal” which is also still running.  Along with a “tee tmp_output”.
>>
>> Looking at the tmp_output file in /usr/src/rtai/base/sched/ reveals an empty file.  Also running is [RTAI_KTHRD_SRVR].
>>
>> I have tried both RTAI 5.0-test1.tar.bz2 as posted on the main page of www.rtai.org<http://www.rtai.org>, and also tried ShabbyX’s github master tree.  Both fail the same way.
>>
>> Anybody have any idea what’s going on here?  I’ve compiled RTAI many times before without this problem occurring, but never on this hardware.
>>
>> -Duane
>>
>>
>>
>>
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