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<div dir="ltr">Myriam :<br>
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<div>Thanks for your effort. It will help us improve PETSc.</div>
<div>Hong</div>
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Hi all,<br>
<br>
I used the wrong script, that's why it diverged... Sorry about that. <br>
I tried again with the right script applied on a tiny problem (~200<br>
elements). I can see a small difference in memory usage (gain ~ 1mB).<br>
when adding the -mat_freeintermediatestructures option. I still have to<br>
execute larger cases to plot the scaling. The supercomputer I am used to<br>
run my jobs on is really busy at the moment so it takes a while. I hope<br>
I'll send you the results on Monday.<br>
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Thanks everyone,<br>
<br>
Myriam<br>
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<br>
Le 04/11/19 à 06:01, Jed Brown a écrit :<br>
> "Zhang, Hong" <<a href="mailto:hzhang@mcs.anl.gov" target="_blank">hzhang@mcs.anl.gov</a>> writes:<br>
><br>
>> Jed:<br>
>>>> Myriam,<br>
>>>> Thanks for the plot. '-mat_freeintermediatedatastructures' should not affect solution. It releases almost half of memory in C=PtAP if C is not reused.<br>
>>> And yet if turning it on causes divergence, that would imply a bug.<br>
>>> Hong, are you able to reproduce the experiment to see the memory<br>
>>> scaling?<br>
>> I like to test his code using an alcf machine, but my hands are full now. I'll try it as soon as I find time, hopefully next week.<br>
> I have now compiled and run her code locally.<br>
><br>
> Myriam, thanks for your last mail adding configuration and removing the<br>
> MemManager.h dependency. I ran with and without<br>
> -mat_freeintermediatedatastructures and don't see a difference in<br>
> convergence. What commands did you run to observe that difference?<br>
<br>
-- <br>
Myriam Peyrounette<br>
CNRS/IDRIS - HLST<br>
--<br>
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