[FLASH-USERS] 3D simulation

[Anshu Dubey]

Please tell us the specifics of the machine you are running on,
specifically what kind of platform is it and what is the memory
per processor. My suspicion is that you are still very close to
exhausting the available memory on the machine with the sizes
you are using.

Anshu

> Hello All,
>
>     I was trying to build up the set up for 3D simulation with smaller
> maxblocks.
>
>   ./setup example -auto -3d -maxblocks=400 -nxb=36 -nyb=36 -nzb=36
>   with refinement-level =6 so that the executable starts to run.
>
> It was running over 16 processors for one and half days and goes up to
> the follwoing point, suddenly it stops showing no error mesg , even
> amr_log file did not show any error mesg. Can anybody has any idea
> what was gone wrong.
> regards,
> Mousumi
>
>   [ 11-27-2007  19:16.58 ] [AMR_REFINE_DEREFINE]: refinement complete
>   [ 11-27-2007  19:17.00 ] [INIT_FROM_SCRATCH]: create level=6
>   [ 11-28-2007  11:42.21 ] [AMR_REFINE_DEREFINE]: refinement initiated at
> 11:42.21
>   [ 11-28-2007  11:44.00 ] [AMR_REFINE_DEREFINE] blocks   all:  min=169
> max=172 tot=2729
>   [ 11-28-2007  11:44.01 ] [AMR_REFINE_DEREFINE] blocks valid:  min=148
> max=151 tot=2388
>   [ 11-28-2007  11:44.01 ] [AMR_REFINE_DEREFINE]: refinement complete
>   [ 11-28-2007  11:44.08 ] [INIT_FROM_SCRATCH]: create level=6
>
>
>
>
> On Tue, 27 Nov 2007, Anshu Dubey wrote:
>
>> That is probably just too big for the loader on the machine. I don't
>> know of any platform on which that size problem will load. You should
>> try to build it with fewer maxblocks.
>>
>> Anshu
>>
>>> Hello All,
>>>     I am using FLASH 2.4 and trying to run 3-dimensional simulation
>>> with
>>> higher
>>> resolution by increasing zones in setup.
>>>
>>>   ./setup example -auto -3d -maxblocks=1500 -nxb=36 -nyb=36 -nzb=36
>>> with refinement-level =6
>>>
>>> The code compiles and generate excutable flash2.
>>>
>>> But when I am trying to run it came with an error:
>>>
>>> "2 processes killed (possibly by Open MPI)"
>>>
>>> It happens when I am trying to run high resolution zones stated above.
>>> If I use the following set up:
>>>
>>> ./setup example -auto -3d -maxblocks=2500 -nxb=16 -nyb=16 -nzb=16
>>>
>>> It compiles and runs well.
>>> For higher number of zones set up it came out with the above error
>>> message.
>>> Can anyone of you came accross with such thing, can you help me or
>>> giving
>>> an
>>> idea what could be the possible reason for the above error mesg.
>>>
>>> regards,
>>> Mousumi Das
>>> Research Associate
>>> University of Michigan
>>>
>>
>>
>>
>>
>