releng 5 panic (again)

Stephen Montgomery-Smith stephen at
Wed May 25 13:03:46 PDT 2005

Please help me!

I know that I am getting few responses to my emails - I am guessing that 
my situation is difficult.  If you could offer any ideas how to help 
with further diagnostics.

I am regularly getting panics with instruction pointer equal to 
0xc0611c69.  I am not able to get any dumps - the dumpon directive is 
simply ignored.

(I did get one dump (for some reason), but that was with a kernel that 
was not made with config -g, and new kernels made afterwards seem 
significantly different, despite having exactly the same size.)

The code at this instruction pointer is

(kgdb) list *0xc0611c69
0xc0611c69 is in fill_kinfo_thread (../../../kern/kern_proc.c:748).
743                     }
745                     kg = td->td_ksegrp;
747                     /* things in the KSE GROUP */
748                     kp->ki_estcpu = kg->kg_estcpu;
749                     kp->ki_slptime = kg->kg_slptime;
750                     kp->ki_pri.pri_user = kg->kg_user_pri;
751                     kp->ki_pri.pri_class = kg->kg_pri_class;

so I'm guessing that kp is not correct.

Because of the consistency of the instruction pointer value from panic 
to panic, I really am thinking that this is not a hardware issue.

I will try any reasonable test you guys have for me.  Right now I am 
switching off HTT to see if that is the issue.  This is a dual Xeon system.

I am willing to provide a copy of the program that I'm guessing is 
causing the problem.  It is a multithreaded program that is very CPU 
instensive, although most of the inners of the code are from the fftw3 port.

One interesting thing about this program is that when I run it, top says 
that about 45% CPU is being used (which with 4 logical CPU's means that 
almost 2 CPU's are being used), but that actual program is registered at 
running with about 80% CPU time (which I am guessing means 0.8 of one 
CPU is being used).  It seems to me that there is some disparity in the 

Maybe it is a problem with the math/fftw3 code.  But is still shouldn't 
causes crashes.

Please help me.  I am sure that this is a difficult problem, but I just 
don't know how to provide you any further decent diagnostic information.

Thanks, Stephen

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