[Nek5000-users] Nek5000-users Digest, Vol 12, Issue 1

[nek5000-users at lists.mcs.anl.gov]

Assuming 2GB/core are available a run with lx1=12 and lelg=120k using 128 processors might be steep. In fact it will not even compile with the default memory model (sum of static data items < 2GB)! In this case you have to lower lelt and hence use more processors. 

However an lx1=8 run (just did a testrun) should work with 2GB/core assuming {ldimt=1,mxprev=20,lgmres=40}.

Stefan


On Feb 3, 2010, at 7:53 PM, nek5000-users at lists.mcs.anl.gov wrote:

> 
> Hi Shriram,
> 
> It depends on the amount of memory on each processor.
> Do you know what that figure is?
> 
> Paul
> 
> On Wed, 3 Feb 2010, nek5000-users at lists.mcs.anl.gov wrote:
> 
>> Hi Paul,
>> 
>> It certainly helps me in setting the parameters lelt and lelg. Thanks.
>> Just curious, is there a minimum number of processors that I need to have
>> for running a simulation with 120k elements ? For example, I was not able to
>> go more than lx1 of 7 on cluster with 128 processors while on other machine
>> I could go upto lx1 = 12 ( With 128 processors) .
>> 
>> Thanks
>> Shriram
>> 
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