<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Wed, Feb 24, 2016 at 9:16 AM, TAY wee-beng <span dir="ltr"><<a href="mailto:zonexo@gmail.com" target="_blank">zonexo@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div>On 24/2/2016 9:12 PM, Matthew Knepley
wrote:<br>
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<div class="gmail_quote">On Wed, Feb 24, 2016 at 1:54 AM, TAY
wee-beng <span dir="ltr"><<a href="mailto:zonexo@gmail.com" target="_blank">zonexo@gmail.com</a>></span>
wrote:<br>
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<div>On 24/2/2016 10:28 AM, Matthew Knepley wrote:<br>
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<div class="gmail_quote">On Tue, Feb 23, 2016 at
7:50 PM, TAY wee-beng <span dir="ltr"><<a href="mailto:zonexo@gmail.com" target="_blank"></a><a href="mailto:zonexo@gmail.com" target="_blank">zonexo@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
I got this error (also attached, full) when
running my code. It happens after a few
thousand time steps.<br>
<br>
The strange thing is that for 2 different
clusters, it stops at 2 different time steps.<br>
<br>
I wonder if it's related to DM since this
happens after I added DM into my code.<br>
<br>
In this case, how can I find out the error?
I'm thinking valgrind may take very long and
gives too many false errors.</blockquote>
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<div>It is very easy to find leaks. You just run
a few steps with -malloc_dump and see what is
left over.</div>
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<div> Matt</div>
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Hi Matt, <br>
<br>
Do you mean running my a.out with the -malloc_dump and
stop after a few time steps?<br>
<br>
What and how should I "see" then?</div>
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<div>-malloc_dump outputs all unfreed memory to the screen
after PetscFinalize(), so you should see the leak.</div>
<div>I guess it might be possible to keep creating things
that you freed all at once at the end, but that is less
likely.</div>
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</div>
<div> Matt</div>
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Hi,<br>
<br>
I got the output. I have zipped it since it's rather big. So it
seems to be from DM routines but can you help me where the error is
from?<br></div></blockquote><div><br></div><div>Its really hard to tell by looking at it. What I do is remove things until there is no leak, then progressively</div><div>put thing back in until I have the culprit. Then you can think about what is not destroyed.</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000">
Thanks.<br>
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-- <br>
Thank you<br>
<br>
Yours sincerely,<br>
<br>
TAY wee-beng<br>
<br>
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-- <br>
<div>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>
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-- <br>
<div>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>
</font></span></div>
</div>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">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>
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