Dear LAMMPS user,
I recently compiled Lammps (lammps-19Jul11 version; Intel 11.0 64 bits, intel MPI 3.2 64 bits; FFTW 2.1.5) on a linux (running 2.6.18-53) cluster.
Dynamics run fine on multiple nodes, but appear to consume a huge amount of virtual memory (12.2 GB/core) as you can see below:
Cpu(s): 4.3%us, 0.6%sy, 0.0%ni, 95.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 32961556k total, 9381104k used, 23580452k free, 445748k buffers
Swap: 8385888k total, 0k used, 8385888k free, 4301780k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
8522 debruint 25 0 12.2g 206m 7364 R 100 0.6 33:29.55 lmp_linux
8523 debruint 25 0 12.2g 210m 7160 R 100 0.7 33:32.88 lmp_linux
8524 debruint 25 0 12.2g 206m 7132 R 100 0.6 33:30.15 lmp_linux
8525 debruint 25 0 12.2g 202m 7372 R 100 0.6 33:32.14 lmp_linux
8527 debruint 25 0 12.2g 210m 7352 R 100 0.7 33:29.07 lmp_linux
8528 debruint 25 0 12.2g 210m 7372 R 100 0.7 33:32.84 lmp_linux
8529 debruint 25 0 12.2g 210m 7096 R 100 0.7 33:32.87 lmp_linux
8530 debruint 25 0 12.2g 212m 7364 R 100 0.7 33:32.95 lmp_linux
8531 debruint 25 0 12.2g 206m 7164 R 100 0.6 33:29.92 lmp_linux
8532 debruint 25 0 12.2g 211m 7388 R 100 0.7 33:30.74 lmp_linux
8533 debruint 25 0 12.2g 210m 7396 R 100 0.7 33:31.66 lmp_linux
8535 debruint 25 0 12.2g 211m 7372 R 100 0.7 33:31.55 lmp_linux
8536 debruint 25 0 12.2g 209m 7384 R 100 0.7 33:33.10 lmp_linux
8521 debruint 25 0 12.2g 209m 7084 R 98 0.7 33:29.29 lmp_linux
8526 debruint 25 0 12.2g 209m 7400 R 98 0.6 33:32.16 lmp_linux
8534 debruint 25 0 12.2g 211m 9716 R 98 0.7 33:32.63 lmp_linux
20239 debruint 15 0 10964 1100 664 R 2 0.0 0:00.01 top
FYI, the simulation box contains about 70000 atoms.
Is this a normal memory behavior?
Thanks in advance for your reply.
Kind regards
Theo de Bruin
Dr. Theo de Bruin
Research Engineer
IFP Energies nouvelles - Applied Chemistry and Physical Chemistry Division
1 et 4 avenue de Bois-Préau
92852 Rueil-Malmaison Cedex - France
Phone: +33 1 47 52 54 38 - Fax: +33 1 47 52 70 58
Email: theodorus.de-bruin@…2876…
Web: www.ifpenergiesnouvelles.fr