[FLASH-USERS] lrefine and parallel problem in flash 3.0 beta

[turcotte]

Hello all,

Using flash3.0 beta, if I run a job using lrefine_max =3 and then try running in 
parallel (on 4 cpus) the job always hang on the refinement step; last output in 
flash.log is 
   
==============================================================================
 [GRID amr_refine_derefine]       initiating refinement
 [GRID amr_refine_derefine] min blks 75    max blks 75    tot blks 600
 [GRID amr_refine_derefine] min leaf blks 75    max leaf blks 75    tot leaf blk
 s 600
 [GRID amr_refine_derefine]       refinement complete
 [ 03-03-2008  20:55.58 ] [GRID gr_expandDomain]: iteration=1, create level=2
 [GRID amr_refine_derefine]       initiating refinement


If I use lrefine_max =1 then I can run on multiple processors without problem.

If I use lrefine_max =3 but run on a single processor, the job runs fine.

The MPI version we have on the machine is MPICH version 1.2.6.

Similar jobs run without any problem in flash2.5 with arbitrary lrefine and 
number of processors.

Any ideas?
 
Thanks,
Sylvain

---

Sylvain Turcotte
Physics Department    turcotte at apollo.ubishops.ca
Bishop's University   tel: (819) 822-9600 x 2287
Lennoxville (Quebec)  fax: (819) 822-9661
Canada  J1M 1Z7       office: J 11B