Dear All,<div><br></div><div>I meet a "problems computing cholesky decomposition" problem while doing the parallel calculations. I checked the archives of this mailing list and din't find a proper solution. So I write here for further help.</div>
<div><br></div><div>I am doing the relaxation/scf calculation. When I submitted the job on a blue-gene machine with " -np 512 -npool 2" , it works but too slow (1000 sec per electron step). So I tried a higher level parallel calculation with "-np 512 -npool 2 -ntg 4 -ndiag 16", and it gave a CRASH report as:</div>
<div> from pdpotrf : error # 23</div><div> problems computing cholesky decomposition </div><div><br></div><div>I checked the memory usage, and it is not the reason.</div><div><br></div><div>Here is the input file and thanks for your help!</div>
<div><br></div><div><br></div><div><div> &control</div><div> calculation='scf'</div><div> restart_mode='from_scratch',</div><div> pseudo_dir = '/gpfs/small/STED/home/STEDzhyy/pseudo/pwscf'</div>
<div> outdir='./tmp'</div><div> prefix='pbe'</div><div> tprnfor = .true.</div><div> tstress = .false.</div><div> disk_io='none'</div><div> /</div><div> &system</div><div> ibrav= 0, celldm(1)=1.8897, nat= 249, ntyp= 4, </div>
<div> ecutwfc =25,ecutrho=150</div><div> occupations='smearing', smearing='gaussian', degauss=0.0072,</div><div> nspin = 2,</div><div> starting_magnetization(1)=0</div><div> starting_magnetization(2)=0</div>
<div> starting_magnetization(3)=0.01</div><div> starting_magnetization(4)=0.05</div><div> /</div><div> &electrons</div><div> /</div><div>CELL_PARAMETERS cubic</div><div> 17.8076000000000008 -10.2812000000000001 0.0000000000000000</div>
<div> 0.0000000000000000 20.5624000000000002 0.0000000000000000</div><div> 0.0000000000000000 0.0000000000000000 25.0000000000000000</div><div>ATOMIC_SPECIES</div><div> C 12.0107 C.pbe-van_ak.UPF</div>
<div> H 1.00794 H.pbe-van_ak.UPF</div><div> N 14.007 N.pbe-van_ak.UPF</div><div> Cu 63.546 Cu.pbe-n-van_ak.UPF</div><div>ATOMIC_POSITIONS {crystal}</div><div>C 0.6877770687760563 0.7285346962446679 0.5652978667315952 1 1 1 </div>
<div>C 0.6645003128091277 0.7848711188927444 0.5642487594707469 1 1 1 </div></div><div>***********</div><div><div>Cu 0.0416700000000034 0.9583299999999966 0.2518400000000014 0 0 0 </div><div>Cu 0.0416700000000034 0.4583299999999966 0.2518400000000014 0 0 0 </div>
<div>K_POINTS {gamma}</div></div><div><br></div><div><br></div><div>Yuyang Zhang</div><div><meta charset="utf-8">Nanoscale Physics and Devices Laboratory<br>Institute of Physics, Chinese Academy of Sciences<br>Beijing 100190, P. R. China</div>