[Mauiusers] maui segfaults trying to schedule a job (SOLVED)

DuChene, StevenX A stevenx.a.duchene at intel.com
Wed Nov 30 11:17:14 MST 2011

I will see if I can run maui through a debugger to see where in the code this is dying. My guess is that the places where it dies, depends on which of these various compiled in limits has been exceeded. I might need some assistance trying to figure out how to exceed particular limits since I am not completely sure what each of the limits you suggested actually does.
Steven DuChene

-----Original Message-----
From: Michel Béland [mailto:michel.beland at calculquebec.ca] 
Sent: Tuesday, November 29, 2011 11:25 AM
To: DuChene, StevenX A
Cc: mauiusers at supercluster.org
Subject: Re: [Mauiusers] maui segfaults trying to schedule a job (SOLVED)

Steven DuChene wrote:

> Thanks for the suggestions.
> I bumped up the following:
> In mcom.h 
> Changed  MMAX_BUFFER from 65536 to 131072
> In msched-common.h
> Changed MAX_MBUFFER from 65536 to 131072
> Changed MMAX_BUFFER from 65536 to 131072
> Changed MAX_MTASK from 4096 to 8192
> In msched.h
> Changed MAX_MREQ_PER_JOB from 4 to 8
> Once I did that the job request would not cause maui to segfault.
> BTW, isn't there someway that this could just kick out some sort of error into the logs instead of just silently causing a segfault? I spent quite a bit of time looking around in the logs and running maui through strace to see what might be wrong. If it would log something about these constants being too low that would be a real big help in tracking down what needs to be changed.
> Also if this was a run time change that could be made in a configuration file instead of having to edit include files and recompile would be great

I agree with you. This job is being done in Moab according to someone I 
talked to at Adaptive Computing's booth at SC2011, but I would not 
expect them to do it in Maui as it competes with Moab. It will have to 
be done by the community, that is you, me or someone else...

Michel Béland, analyste en calcul scientifique
michel.beland at calculquebec.ca
bureau S-250, pavillon Roger-Gaudry (principal), Université de Montréal
téléphone : 514 343-6111 poste 3892     télécopieur : 514 343-2155
Calcul Québec (www.calculquebec.ca)
Calcul Canada (calculcanada.org)

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