<div dir="ltr"><div>Dear experts and users,</div><div><br></div><div>I am trying to
find the convergence for a 2*2*1 supercell of a doped orthorhombic ABX3
type structure (the system specification is provided below). The space group is Pnma for the pure structure and it
changes to P-1 for the doped supercell. The supercell also consists of
80 atoms among which 40 are inhomogenes. The scf is calculated with
"run_lapw -p -ec 0.0001 -cc 0.001 -fc 1". Forces on some atoms are more
than 5 mRy/a.u. (maximum 6.629 mRy/a.u.). Should we go for geometry
minimization ? Whether the changed space group is correct or not.</div><div></div><div> The scf is working fine for the RKmax=7 whereas lapw2 crashes (stating forrtl: severe (67): input statement requires too much data, unit 10) for Rkmax=8 and kmesh 4*9*5. Is it fine to proceed with RKmax=7?<br></div><div><br></div><div><br></div><div><br></div><div>And
also, the parallel calculation is running in a HPC (Processor: dual
socket 18 core per
socket intel skylake processor, RAM: 96 GB ECC DDR4 2133 MHz
RAM in balanced configuration, Operating system: CentOS-7.3, using compiler/intel 2018.5.274).
OMP_NUM_THREADS=40 is set in the bashrc file. The last few lines of
.machine reads as <br></div><div>"1: localhost</div><div> 1:localhost</div><div>granularity:1</div><div>extrafine:1</div><div>#uncomment for specific OMP_parallelization (overwriting a global OMP_NUM_THREAD)</div><div>#omp_global:4</div><div>#or use program-specific parallelization:</div><div>#omp_lapw0:4</div><div>#omp_lapw1:4</div><div>#omp_lapw2:4</div><div>#omp_lapwso:4</div><div>#omp_dstart:4</div><div>#omp_sumpara:4</div><div>#omp_nlvdw:4"<br></div><div>I
am a little bit confused about how the parallel distribution is made
and whether we are using the system maximally for the calculation or not. I
am using parallel calculation for the first time. <br></div><div><br></div><div>Looking forward to your valuable opinion.</div><div><br></div><div><br></div><div>Thank you in advance.<font color="#888888"><br></font></div><font color="#888888"><div><br></div><div> </div></font><br clear="all"><br>-- <br><div dir="ltr" data-smartmail="gmail_signature"><div dir="ltr"><div>With regards</div><div>Anupriya Nyayban</div><div>Ph.D. Scholar</div><div>Department of Physics</div><div>NIT Silchar<br></div></div></div></div>