Hello everybody, I'm running parallel espresso (v2.1.5) in an Itanium2 cluster. The OS is Red Hat Linux, and the kernel is 2.4.20. The cluster uses mpich 1.2.6, and the jobs are sent using PBS. Compiler is Intel v7. Most nodes use 4Gb, though there are some with 16Gb RAM.
The thing is that, when I send a phonon multiprocessor run, while it doesn't use a lot of memory (some 250Mb per thread), it swaps out. I've run two proccessors in a 4 proc node and, to make sure other jobs don't interfere, using all 4 procs for myself. 1) Is it normal that, while it could empty memory from older jobs, my phonon runs are swapping? I personally haven't seen this on my laptop (gfortran instead of ifc)... but I only do low cutoff and kpoints runs in my laptop. 2) Will this affect performance badly? Or are phonon runs more restricted by i/o speeds? 3) This is a bit off topic. Is it OK to use -npools while using processors in the same node or is it dumb? Thank you very much for your time, Miguel -- ---------------------------------------- Miguel Mart?nez Canales Dto. F?sica de la Materia Condensada UPV/EHU Facultad de Ciencia y Tecnolog?a Apdo. 644 48080 Bilbao (Spain) Fax: +34 94 601 3500 Tlf: +34 94 601 5437 ---------------------------------------- "UNIX was not designed to stop its users from doing stupid things, as that would also stop them from doing clever things." Doug Gwyn
