MSC/NASTRAN V70.5.1 Million DOF Performance Data

This page contains graphs of CPU and Elapsed times for two models larger than 1 million DOF. The runs were made by hardware vendors with specific run specifications. Hardware vendors were also given the opportunity to rerun the jobs with different command line paramters. Results of these runs are labeled MODEL_opt in the graph.

Below is a summary of the test problems.

Name Ndof Description SOL MEM SCR Disk I/O Transferred Comments
XXCMD 1,519,472 Car Body 103 400 Mb 42.6 Gb 2116 Gb 1076 Modes
XXDMD 1,920,855 Engine 103 960 Mb 29.9 Gb 475 Gb 17 Modes

 

Comments are listed below:

  • The parameters for the optimized runs are vendor confidential.
  • The number of solves is different for each vendor. This difference is a result of the fact that shift logic is based on various module times. The CPU and elapsed times (in seconds) as well as the number of solves are shown in the following table:
    Vendor Hardware XXCMD XXDMD
    CPU Elapsed # of Solves CPU Elapsed # of Solves
    sun E6000 336MHz_opt 70745 71416 16
    sun E4000 336MHz 181043 253643 318 88068 243251 16
    sgi origin R12000 300MHz_opt 63999 65685 369 46429 19591 15
    sgi origin R12000 300MHz 69246 71987 330 35482 43163 21
    nec SX4_opt 15044 17985 159
    nec SX4 20922 25789 321 22940 24180 29
    intel Dell WS610 188948 262413 320 97123 143429 16
    ibm RS6000/397 92486 167747 301 40535 100085 23
    ibm PWR 3 43P-260 83597 120168 301 43851 67897 16
    hp N4000 49164 52302 301 28916 24503 15
    digital ES40 EV6 500 68688 72917 318 33899 43458 15
    cray T94_opt 16457 11685 187 11252 9841 16
    cray T94 14079 22391 328 10081 12674 15
    cray J90se_opt 111027 47907 158 59480 36530 15
    cray J90se 89692 92252 375 54722 55739 15
  • The CPU time is greater than Elapsed for XXDMD on the N4000 even though only 1 CPU was requested by MSC/NASTRAN. The reason that this occurs is because the operating system used multiple CPUs for I/O even though MSC/NASTRAN used only 1 CPU.
  • XXDMD on the HP/N4000 was run with a patch for HPUX 11.0 MSC/NASTRAN V70.5 executables for performance reasons.