[nptl] Re: SCHED_RR issue

["Loic Domaigne" <loic-dev@gmx.net>]

Gidday! 

My answer took a bit time to come... I apologize for that.
Hope that is was worth to wait 8-)

I have developped a program in order to understand what's going on. 
After hours of testing (and constantly rebooting), I think I 
finally extracted the core of the problem...

On my system, it seems that a SCHED_RR thread running at prio p+1 
got sometimes troubles to start threads running at prio p!! 

I'll post the program on the forum ASAP. 
People having access to SMP machines are urged to try it out ;-)

I have also tested on an Alpha dual EV56 CPUs system. 
Everything ran as expected. I couldn't reproduce the problem at all.
Perhaps it is a Linux issue? 

But we need:
1. gather more data.
2. verify that the program doesn't have any "BUG/RT-issue". 


Regards,
Loic.

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unsigned y[]=
{0,34432,26811,16721,41866,63119,61007,48155,26147,10986};
void x(z){putchar(z);}; unsigned t; 
main(i){if(i<10){t=(y[i]*47560)%65521;x(t>>8);x(t&255);main(++i);}}

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