<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix">On 08/26/2014 12:06 PM, Matthew Knepley
wrote:<br>
</div>
<blockquote
cite="mid:CAMYG4GkSc8uzku2JFi+H4eX6SHf3D2vU9EiVwoCzbE5=Wp6umw@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_quote">On Tue, Aug 26, 2014 at 1:33 AM,
Nicola Creati <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:ncreati@inogs.it" target="_blank">ncreati@inogs.it</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Hello,<br>
I'm writing a large application in Python that uses
petsc4py to solve some equations. Running my code I note
that PETSc detects errors in sections (I believe in Cython
extensions and packages) where petsc4py is not imported or
used. I do not need to fix the problem, I already did it.
Is there a way to avoid petsc4py/PETSc to catch errors in
not PETSc sections of the code?<br>
This is an example of the error message I got:<br>
<br>
[0]PETSC ERROR: ------------------------------------------------------------------------<br>
[0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation
Violation, probably memory access out of range<br>
[0]PETSC ERROR: Try option -start_in_debugger or
-on_error_attach_debugger<br>
[0]PETSC ERROR: or see <a moz-do-not-send="true"
href="http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind[0]PETSC"
target="_blank">http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind[0]PETSC</a>
ERROR: or try <a moz-do-not-send="true"
href="http://valgrind.org" target="_blank">http://valgrind.org</a>
on GNU/linux and Apple Mac OS X to find memory corruption
errors<br>
[0]PETSC ERROR: likely location of problem given in stack
below<br>
[0]PETSC ERROR: --------------------- Stack Frames
------------------------------------<br>
[0]PETSC ERROR: Note: The EXACT line numbers in the stack
are not available,<br>
[0]PETSC ERROR: INSTEAD the line number of the start
of the function<br>
[0]PETSC ERROR: is given.<br>
--------------------------------------------------------------------------<br>
mpiexec noticed that process rank 0 with PID 25694 on node
daisy exited on signal 11 (Segmentation fault).<br>
--------------------------------------------------------------------------<br>
<br>
I'm using Python 2.7.6, petsc4py 3.4 and PETSc 3.4.3.<br>
</blockquote>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscPopSignalHandler.html">http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscPopSignalHandler.html</a><br>
</div>
<div><br>
</div>
<div> Thanks,</div>
<div><br>
</div>
<div> Matt</div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Thanks.<span
class=""><font color="#888888"><br>
<br>
Nicola<br>
<br>
-- <br>
_____________________________________________________________________<br>
Nicola Creati<br>
Istituto Nazionale di Oceanografia e di Geofisica
Sperimentale - OGS<br>
IRI (Ricerca Teconologica e Infrastrutture) Department<br>
B.go Grotta Gigante - Brisciki 42/c<br>
34010 Sgonico - Zgonik (TS) - Italy<br>
Tel. <a moz-do-not-send="true"
href="tel:%2B39-0402140213" value="+390402140213"
target="_blank">+39-0402140213</a><br>
Fax <a moz-do-not-send="true"
href="tel:%2B39-040327307" value="+39040327307"
target="_blank">+39-040327307</a><br>
<br>
</font></span></blockquote>
</div>
<br>
<br clear="all">
<div><br>
</div>
-- <br>
What most experimenters take for granted before they begin
their experiments is infinitely more interesting than any
results to which their experiments lead.<br>
-- Norbert Wiener
</div>
</div>
</blockquote>
Thank you, but PetscPopSignalHandler has not been wrapped in
petsc4py.<br>
<br>
Nicola<br>
<br>
<pre class="moz-signature" cols="72">--
_____________________________________________________________________
Nicola Creati
Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS
IRI (Ricerca Teconologica e Infrastrutture) Department
B.go Grotta Gigante - Brisciki 42/c
34010 Sgonico - Zgonik (TS) - Italy
Tel. +39-0402140213
Fax +39-040327307</pre>
</body>
</html>