Re: [Xenomai-help] Problems with rt_task_create and rt_task_join

[Michel Rinaldi <automation.03@domain.hid>]

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Posted by Gilles Chanteperdrix on January 25, 2011 - 14:27: 

>Well, no. dd if=/dev/zero of=/dev/null is far from being a proper load. 
>What you should do is at least to create some disk and network activity, 
>continuously. And the ideal, is to run the LTP test in parallel. If you 
>can not, then at least run hackbench in a loop. All this during several 
>hours. 

Ok. I run LTP test and latency test in parallel for about 15 hours continuously. 
I have this result at the end: 

RTD| 6.182| 7.627| 47.662| 0| 0| 15:04:32/15:04:32 

I also run hackbench in a loop (with 100 groups) for about 14 hours and I obtain: 

RTD| 6.100| 8.341| 21.727| 0| 0| 13:39:24/13:39:24 

>We add ids to the smi.c table when people send patches, and report that 
>the workaround... works. Anyway, if you suspect that the ICH workaround 
>does not work with SCH chipsets, you should have a look at the SCH 
>chipsets datasheet, to check whether the method for disabling SMIs is 
>the same. 

I'll try to check this and I'll inform you if I succeed in disabling SMIs on SCH. 

>In facts, same test (only without file transfer) under another system with 
>1GHz Intel Atom on a SCH (Poulsbo) chipset (not supported by Xenomai to 
>disable SMIs) reports these results: 
> 
>RTD| 11.353| 13.808| 31.264| 3| 0| 2.934| 231.539 

>What I do not understand, in on which system you get the issue with your 
>test application. If you want to know if the system on which you run the 
>test has an isssue, then surely you should test this system, not another... 

Yes, I run test on this Atom system only to have results from another machine to compare with results from my develop host. 
I'm testing only my develop host, for ease I synthetize again its features: 
Intel Celeron M 600MHz 
512MB ram 
ICH4 chipset (Xenomai's SMI workaround applied) 
Ubuntu 10.04 with compiled kernel 2.6.35.7 
Xenomai 2.5.5.2 
Adeos patch 2.7-04 

Thank you! 
Mauro 


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