We are often asked what kind of computer is needed to do DEM-Simulation with LIGGGHTS.
I used every computer system in my local area to make a little benchmark.
All tests where done with the moving mesh example script** and Liggghts 2.2.3.
The Linux machines are running Ubuntu 12.04.1 LTS with mpich2 and GCC compiler.
The Windows 7|8 machines are running mpich2 1.4.1 and a cross compiled windows version*** (VS2008 compiler).
The CPU's with QM suffix are notebooks, all other machines are more ore less good workstations.
You can see different things:
Hyperthreading is bad (no wonder because, computing power needs to be constant),
Higher Frequency results in faster simulation (but not linear),
Intel beats AMD (at equil clock frequency),
Linux beats Windows (no wonder..).
Best,
Christian.
** to respect mesh-parallel scaling
***see techblog.richtisoft.de for details and a downloadlink.
| Attachment | Size |
|---|---|
 summary.txt | 5.6 KB |
giuraso | Thu, 09/01/2016 - 15:42
any update about this?
Hi,
any update about this matter?
I need to choose between two solutions for the upgrade of a HPC that is used for DEM and CFD simulations:
1) 2 new blades with Intel Xeon 22C/44T 2.4GHz
2) 1 blade with with 32 cores Intel Xeon @ 2.6GHz
I read that hyper threading is not the best solution for scientific computing. I was wondering if there is any guideline on the choice of new hardware.
For large simulations (200-300k), what do you suggest? Anyone had issues with low RAM?
Thank you!
Giuseppe