Re: RTAI 5.0-test2 released

On 06/27/2016 03:23 AM, Paolo Mantegazza wrote:
> On 06/25/2016 05:11 PM, Sebastian Kuzminsky wrote:
>> On 06/24/2016 02:19 AM, Paolo Mantegazza wrote:
>> > If the problem is related to a lock due to many modules removal it is
>> > difficult for me to say anything, especially in view of the use of a
>> > virtual env. I've just a question: does the same happens out of a
>> > virtualization?
>>>
>>> Paolo
>>
>> I just ran an over-night test on bare metal.  It ran much longer than
>> in my virtual machines, but this morning it too had crashed.
>>
>> The console was blank and unresponsive, so i don't have any info to
>> help debug this, sorry :-(
>>
>> I'd be happy to run any tests anyone would like.
>>
>>
> I did not understand if you have problem in loading-unloading modules
> under a virtual environment or just in running a test for a long time?
> Paolo

I spoke unclearly, apologies.

My test consists of repeatedly building LinuxCNC and running the 
LinuxCNC test suite.

The LinuxCNC test suite consists of ~180 tests.  Many of the tests run a 
sequence where they load the realtime modules (from RTAI and from 
LinuxCNC), exercise the code and check the results, then unload all the 
realtime modules.

It's unknown to me where in this loop the bare-metal test failed.

I've observed failures during unload in virtual machines.  Here's a 
kernel log of two consecutive test cases from our test suite, where the 
machine locked up during unload on the second test case:

>         [ 8780.404223] I-pipe: head domain RTAI registered.
>         [ 8780.405262] RTAI[hal]: mounted. ISOL_CPUS_MASK: 1.
>         [ 8780.406019] SYSINFO - # CPUs: 2, TIMER NAME: 'lapic', TIMER IRQ: 2305, TIMER FREQ: 62502000, CLOCK NAME: 'tsc', CLOCK FREQ: 2000081000, CPU FREQ: 2000081000, LINUX TIMER IRQ: 2305.
>         [ 8780.414520] RTAI[malloc]: global heap size = 2097152 bytes, <BSD>.
>         [ 8780.415838] , kstacks pool size = 524288 bytes.
>         [ 8780.416828] RTAI[sched]: hard timer type/freq = lapic/62502000(Hz); timing: oneshot; linear timed lists.
>         [ 8780.418232] RTAI[sched]: Linux timer freq = 250 (Hz), TimeBase freq = 2000081000 hz.
>         [ 8780.419350] RTAI[sched]: timer setup = 1504 ns, resched latency = 0 ns.
>         [ 8780.449429] USERMODE CHECK: OK.
>         [ 8780.449941] USERMODE CHECK PROVIDED (ns): KernelLatency 8897, UserLatency 9087.
>         [ 8780.451010] FINAL CALIBRATION SUMMARY (ns): KernelLatency 8897, UserLatency 9087.
>         [ 8780.455566] RTAI[math]: loaded, using NEWLIB.
>         [ 8781.136562] RTAI[math]: unloaded.
>         [ 8781.148269] SCHED releases registered named ALIEN PEDV$D
>         [ 8781.169297] RTAI[malloc]: unloaded.
>         [ 8781.268150] RTAI[sched]: unloaded (forced hard/soft/hard transitions: traps 0, syscalls 0).
>         [ 8781.273428] I-pipe: head domain RTAI unregistered.
>         [ 8781.275513] RTAI[hal]: unmounted.

>         [ 8781.356263] I-pipe: head domain RTAI registered.
>         [ 8781.357292] RTAI[hal]: mounted. ISOL_CPUS_MASK: 1.
>         [ 8781.358043] SYSINFO - # CPUs: 2, TIMER NAME: 'lapic', TIMER IRQ: 2305, TIMER FREQ: 62502000, CLOCK NAME: 'tsc', CLOCK FREQ: 2000081000, CPU FREQ: 2000081000, LINUX TIMER IRQ: 2305.
>         [ 8781.366385] RTAI[malloc]: global heap size = 2097152 bytes, <BSD>.
>         [ 8781.367682] , kstacks pool size = 524288 bytes.
>         [ 8781.368639] RTAI[sched]: hard timer type/freq = lapic/62502000(Hz); timing: oneshot; linear timed lists.
>         [ 8781.370053] RTAI[sched]: Linux timer freq = 250 (Hz), TimeBase freq = 2000081000 hz.
>         [ 8781.371301] RTAI[sched]: timer setup = 1499 ns, resched latency = 0 ns.
>         [ 8781.401245] USERMODE CHECK: OK.
>         [ 8781.401761] USERMODE CHECK PROVIDED (ns): KernelLatency 8897, UserLatency 9087.
>         [ 8781.402845] FINAL CALIBRATION SUMMARY (ns): KernelLatency 8897, UserLatency 9087.
>         [ 8781.407514] RTAI[math]: loaded, using NEWLIB.
>         [ 8781.488021] RTAI[math]: unloaded.
>         *** lockup here, while waiting for "SCHED releases registered named ALIEN PEDV$D"


And of course, all these tests run fine with our earlier (3.9-era and 
older) versions of RTAI.


-- 
Sebastian Kuzminsky
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