[nptl] Re: SCHED_RR issue

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

> I just executed some additional tests on the 2x IA32 box:
> 
> (*) Suse 9 base (kernel 2.4.x, libpthreads = linuxthreads I think)
>  -> "./test 1 1" doesn't even start; have to kill with ctrl-c (won't
> timeout)
> 
> (*) Suse 9 (linuxthreads) + kernel 2.6.8.1
>  -> "./test 1 1" doesn't even start (same as previous)
> 
> (*) Suse 9 + kernel 2.6.8.1 + recent glibc (with NPTL)
>  -> Same results as with FC2 (i.e. timeout)

Hmm... with LinuxThreads things are a bit different because 
of the so-called manager thread. And the signalling stuff.
And the getpid() stuff... And surely many other stuffs, too.
Definitively need to look more closely at it!  


> So it looks like the distrib is not influent, only kernel + libc is
> important (I thought at first that only the kernel was influent).

Accordingly to: 
http://www-uxsup.csx.cam.ac.uk/suse/adminguide/ch02s02.html

NPTL is the default library on SuSE 9.1. You might switch back 
to LinuxThreads in a same fashion than on RH-based distro. 


A+
Loic.

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