Hi,
These are my very first steps into CONFIG_PREEMPT_RT.
I built a kernel 2.6.20-rc3-rt0, booted it on a x86 based single board
computer and tried to run cyclictest.
"cyclictest -t 1 -p 80 -i 10000 -l 10000 -n" runs fine.
But "cyclictest -t 1 -p 80 -i 10000 -l 10000" hangs.
Putting in some printfs I got the impression that the timerthread() blocks
at sigwait()
case MODE_SYS_ITIMER:
if (sigwait(&sigset, &sigs) < 0) {
goto out;
}
break;
So I I booted the OSADL Live CD provided at
http://www.osadl.org/projects-live-cd.0.html
on the same board and cyclictest runs fine in both modes.
I build a kernel 2.6.17 + 2.6.17-rt3 patch with the same kernel config used
on this CD. But cyclictest hangs when using interval timer.
So I recon it has something to do with the rootfs I am using (created with
PTXdist).
Will I need a special version of glibc or libpthread? NTPL?
I am using a cross tool chain gcc-3.4.4-glibc-2.3.5 for i686 built with
"crosstool".
Any ideas what I could be missing? Or how I could find out.
Thanks a million!
--
Steven
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