Re: [Xenomai-core] kernel threads crash

[Philippe Gerum <rpm@xenomai.org>]

On Tue, 2011-04-19 at 09:58 +0200, Jesper Christensen wrote:
> Great thanks, but i can't help wondering if the problems i'm seeing are
> related to some of my userspace programs using fp.

I don't think so. The switchtest programs exercises the FPU hardware in
a certain way to make sure it is available in real-time mode from kernel
space (which is an utterly crappy legacy, but we will have to deal with
it until Xenomai 3.x). As far as I can see from your .config, you can't
have such support, so switchtest was basically trying to test an
inexistent feature.

> 
> /Jesper
> 
> 
> On 2011-04-19 09:39, Philippe Gerum wrote:
> > On Tue, 2011-04-19 at 09:26 +0200, Jesper Christensen wrote:
> >   
> >> If i run switchtest i get the following output:
> >>
> >>     
> >
> > If still talking about the cpci6200, this patch should apply:
> > http://git.xenomai.org/?p=xenomai-rpm.git;a=commit;h=3d6fa118ef282c60dfeb0e690a579e8357bb7d13
> >
> >   
> >> [root@domain.hid /bin]# switchtest
> >> == Testing FPU check routines...
> >> r0: 1 != 2
> >> r1: 1 != 2
> >> r2: 1 != 2
> >> r3: 1 != 2
> >> r4: 1 != 2
> >> r5: 1 != 2
> >> r6: 1 != 2
> >> r7: 1 != 2
> >> r8: 1 != 2
> >> r9: 1 != 2
> >> r10: 1 != 2
> >> r11: 1 != 2
> >> r12: 1 != 2
> >> r13: 1 != 2
> >> r14: 1 != 2
> >> r15: 1 != 2
> >> r16: 1 != 2
> >> r17: 1 != 2
> >> r18: 1 != 2
> >> r19: 1 != 2
> >> r20: 1 != 2
> >> r21: 1 != 2
> >> r22: 1 != 2
> >> r23: 1 != 2
> >> r24: 1 != 2
> >> r25: 1 != 2
> >> r26: 1 != 2
> >> r27: 1 != 2
> >> r28: 1 != 2
> >> r29: 1 != 2
> >> r30: 1 != 2
> >> r31: 1 != 2
> >> == FPU check routines: OK.
> >> == Threads: sleeper_ufps0-0 rtk0-1 rtk0-2 rtk_fp0-3 rtk_fp0-4
> >> rtk_fp_ufpp0-5 rtk_fp_ufpp0-6 rtup0-7 rtup0-8 rtup_ufpp0-9 rtup_ufpp0-10
> >> rtus0-11 rtus0-12 rtus_ufps0-13 rtus_ufps0-14 rtuo0-15 rtuo0-16
> >> rtuo_ufpp0-17 rtuo_ufpp0-18 rtuo_ufps0-19 rtuo_ufps0-20
> >> rtuo_ufpp_ufps0-21 rtuo_ufpp_ufps0-22
> >>
> >>
> >>
> >> And then it halts. dmesg shows:
> >>
> >> Xenomai: suspending kernel thread ae819678 ('rtk5/0') at nip=0x80319aa0,
> >> lr=0x80319a70, r1=0xafa90510 after exception #1792
> >>
> >>
> >> switchtest -n runs normally, should i use some sort of soft float flag
> >> in my compilations?
> >>
> >> /Jesper
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >> Xenomai-core mailing list
> >> Xenomai-core@domain.hid
> >> https://mail.gna.org/listinfo/xenomai-core
> >>     
> >   
> 

-- 
Philippe.