Dear Haiming Li, > However, I found that the walltime is too long for parallel calculations: > > PWSCF : 1m 4.86s CPU time, 32m53.67s wall time
The large discrepancy between the cpu time and the wall clock time indicates that you have a slow connection between your machines. A huge amount of time seems to be wasted in communication. If you can, try submitting on the different processors on the same machine rather than different machines. Best wishes, Hande -- Hande Toffoli Department of Physics Office 439 Middle East Technical University Ankara 06531, Turkey Tel : +90 312 210 3264 http://www.physics.metu.edu.tr/~hande
