[Users] problem on running bbh expample

[Cory Chu]

Erik

Actually, even with --procs=2 --num-threads=1
I will get:
The environment variable CACTUS_NUM_PROCS is set to 2, but there are 1 MPI
processes.

However, with only --procs=2 can really start a simulation, and terminate
due to  TAT/Slab limitation

Is there any configuration corresponding to
"but there are 1 MPI processes. This may indicate a severe problem with the
MPI startup mechanism."

I'm using
optionlist       ubuntu.cfg
submitscript      generic.sub
runscript      debian.run

Cory


On Fri, Dec 23, 2016 at 9:44 PM, Erik Schnetter <schnetter at cct.lsu.edu>
wrote:

> Cory
>
> Using "--procs=4 --num-threads=1" might help. You do not need to
> change the settings in the ".ini" file; only the command line
> parameters determine how many MPI processes are used.
>
> -erik
>
> On Fri, Dec 23, 2016 at 8:12 AM, Cory Chu <cory.yk.chu at gmail.com> wrote:
> > Hi Ian
> >
> > I'am running on VirtualBox set whit 2 Processors and 8GB RAM
> >
> > When i try with this submit command
> >
> > create-submit mybbh --parfile par/BBHLowRes.par --num-threads=1 --procs=2
> >
> > I get following message in .err file
> >
> > WARNING level 0 from host kpc-VirtualBox process 0
> >   while executing schedule bin (none), routine (no thorn)::(no routine)
> >   in thorn Carpet, file
> > /home/kuangtly/programming/ET/forfun/Cactus/arrangements/
> Carpet/Carpet/src/SetupGH.cc:153:
> >   -> The environment variable CACTUS_NUM_PROCS is set to 2, but there
> are 1
> > MPI processes. This may indicate a severe problem with the MPI startup
> > mechanism.
> > cactus_sim:
> > /home/kuangtly/programming/ET/forfun/Cactus/arrangements/
> Carpet/Carpet/src/helpers.cc:275:
> > int Carpet::Abort(const cGH*, int): Assertion `0' failed.
> > Rank 0 with PID 15985 received signal 6
> > Writing backtrace to BBHLowRes/backtrace.0.txt
> > Aborted (core dumped)
> >
> >
> > i have change these setting in .ini file
> > ppn =2
> > max-num-threads =2
> > num-threads =2
> >
> >
> >
> > On Fri, Dec 23, 2016 at 6:28 PM, Ian Hinder <ian.hinder at aei.mpg.de>
> wrote:
> >>
> >>
> >> On 23 Dec 2016, at 10:52, Cory Chu <cory.yk.chu at gmail.com> wrote:
> >>
> >> Erik
> >>
> >> Should I simply change the .ini file in simfactory/mdb/machines
> >> with
> >> ppn = 2
> >> max-num-threads = 2
> >> num-threads = 2
> >>
> >> and adding --procs = 2 on running command ?
> >>
> >> sorry i just can not find a detail documentation on this part
> >> after i change the above setting
> >> the problem did not solved
> >>
> >>
> >> Hi Cory,
> >>
> >> Can you give the command line you are using to submit the simulation?
> You
> >> need to ensure that the number of MPI processes you use is larger.  You
> >> could do this by running fewer threads per process, or if you are
> already
> >> running one thread per process, by increasing the number of processes by
> >> increasing the number of threads.  That might mean reconfiguring the
> machine
> >> definition to allow more cores to be used than you actually have.  What
> >> machine is it; i.e. how many processors and cores do you have?
> >>
> >> --
> >> Ian Hinder
> >> http://members.aei.mpg.de/ianhin
> >>
> >
>
>
>
> --
> Erik Schnetter <schnetter at cct.lsu.edu>
> http://www.perimeterinstitute.ca/personal/eschnetter/
>
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