Problems with Socket

[Matthew Knepley]

You have to type 'cont' in the debugger.

 Matt

On Thu, Mar 12, 2009 at 9:19 AM, Santolo Felaco <ahuramazda10 at gmail.com>wrote:

> Hi,
> I execute ex42a and then ex42.
>
> Execution:
>
>  mpirun -np 1 ./ex42a -start_in_debugger
>
> (gdb) bt
> #0  0xb7f9a410 in __kernel_vsyscall ()
> #1  0xb7dd8c90 in nanosleep () from /lib/../lib/tls/i686/cmov/libc.so.6
> #2  0xb7dd8ac7 in sleep () from /lib/../lib/tls/i686/cmov/libc.so.6
> #3  0x08195837 in PetscSleep (s=10) at psleep.c:40
> #4  0x081c277e in PetscAttachDebugger () at adebug.c:411
> #5  0x081836a2 in PetscOptionsCheckInitial_Private () at init.c:371
> #6  0x08187dfe in PetscInitialize (argc=0xbfb5edb0, args=0xbfb5edb4,
> file=0x0,
>     help=0x8224da0 "Sends a PETSc vector to a socket connection, receives
> it back, within a loop. Works with ex42.c.\n") at pinit.c:488
> #7  0x0805073b in main (argc=2, args=0xbfb5ee34) at ex42a.c:17
>
> mpirun -np 1 ./ex42 -start_in_debugger
>
> (gdb) bt
> #0  0xb7f8a410 in __kernel_vsyscall ()
> #1  0xb7dc8c90 in nanosleep () from /lib/../lib/tls/i686/cmov/libc.so.6
> #2  0xb7dc8ac7 in sleep () from /lib/../lib/tls/i686/cmov/libc.so.6
> #3  0x081953d7 in PetscSleep (s=10) at psleep.c:40
> #4  0x081c231e in PetscAttachDebugger () at adebug.c:411
> #5  0x08183242 in PetscOptionsCheckInitial_Private () at init.c:371
> #6  0x0818799e in PetscInitialize (argc=0xbfaded30, args=0xbfaded34,
> file=0x0,
>     help=0x8223c00 "Reads a PETSc vector from a socket connection, then
> sends it back within a loop. Works with ex42.m or ex42a.c\n") at pinit.c:488
> #7  0x0805073b in main (argc=2, args=0xbfadedb4) at ex42.c:18
>
>
> 2009/3/12 Matthew Knepley <knepley at gmail.com>
>
> On Thu, Mar 12, 2009 at 8:20 AM, Santolo Felaco <ahuramazda10 at gmail.com>wrote:
>>
>>> Hi I use Petsc 2.3.1 (I don't use the last version because I work on a
>>> software developed with this version).
>>> I tried to used the Petsc socket, but the client and server programs but
>>> they don't connect (the execution is blocked).
>>> I am using two examples of Petsc:
>>> http://www.mcs.anl.gov/petsc/petsc-as/snapshots/petsc-current/src/vec/vec/examples/tutorials/ex42a.c.htmland
>>>
>>> http://www.mcs.anl.gov/petsc/petsc-as/snapshots/petsc-current/src/vec/vec/examples/tutorials/ex42.c.html
>>>
>>> I tried to execute ex42a on machine and ex42 on other machine, and I
>>> execute both programs on same machine.
>>
>>
>> 1) It is extremely hard to debug old code. We have made several socket
>> fixes for new OS/architectures.
>>
>> 2) Make sure you start the server (ex42a) and then the client (ex42)
>>
>> 3) Run using the debugger, -start_in_debugger, and give us a stack trace
>> of the hang
>>
>>   Matt
>>
>>
>>>
>>> Do you help me? Thanks.
>>> Bye.
>>>
>> --
>> What most experimenters take for granted before they begin their
>> experiments is infinitely more interesting than any results to which their
>> experiments lead.
>> -- Norbert Wiener
>>
>
>


-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20090312/a08e9943/attachment.htm>