ANSYS High. Computing. User Group CAE Associates

Transcription

1 ANSYS High Performance Computing User Group CAE Associates

2 Parallel Processing in ANSYS ANSYS offers two parallel processing methods: Shared-memory ANSYS: Shared-memory ANSYS uses the sharedmemory architecture in ANSYS, meaning using multiple processors on a single machine. Most, but not all, of the solution phase runs in parallel when using the shared-memory architecture. Many solvers in ANSYS can use the shared-memory architecture. In addition, pre- and postprocessing can make use of the multiple processors, including graphics operations, processing of large CDB files, and other data and compute intensive operations

3 Parallel Processing in ANSYS Distributed ANSYS: Distributed ANSYS can run over a cluster of machines or use multiple processors on a single machine and works by splitting the model into different parts and distributing those parts to each machine/processor. By solving only a portion of the entire model on each machine/processor, the processing time and memory requirements can be reduced. With Distributed ANSYS, the entire solution phase runs in parallel, including the stiffness matrix generation, linear equation solving, and results calculations. If you are running Distributed ANSYS on a single machine with multiprocessors, then the non-solution phases (for example, pre- and postprocessing) will run in shared-memory parallel mode, making use of the multiprocessors for graphics and other data and compute intensive operations, as is done in shared-memory ANSYS.

4 FEA Benchmark Problem Bolted Flange with O-Ring Nonlinear material properties (Hyperelastic O-Ring) Large Deformation Nonlinear Contact 1 Million Degrees of Freedom ANSYS

5 Datahal DHCAD5650 High End Workstation SuperMicro 4U Tower Black SATA 5.5 Bays Hotswap EATX 00W RPS Dual Hex Core (1 cores total) Intel XEON GHz Processors 4 GB RAM (4) 6GB ( x GB) 1MHz DDR/PC Non-ECC DDR SDRAM 40-Pin DIMM Four 00GB Toshiba SAS 15,000 RPM 16MB.5IN drives in RAID 0. One 500GB SATA Hard Drive for the Operating System Nvidia Quadro FX 100 Video Card LG DVD/RW 5

6 FEA Benchmark Performance 7 Single Machine SMP Sparse vs. MPP DSPARSE 6 5 Sol lver Speed Up 4 SPARSE DSPARSE # Cores 6

7 CFX Benchmark Problem Flow around an airfoil 1 Million Elements -D, Steady State, Compressible Flow k-ε Turbulence Model 7

8 CFX Benchmark Performance 7 CFX Parallel Performance 6 5 Sol lver Spped Up 4 CFX # Cores

9 Disk Drive Speed The bolted flange analysis was run on the two different drives of our high end workstation to compare disk speed influence on solution time. The RAID array completed the solution almost twice as fast as the SATA drive: Run #1: PCG Solver, 1 CPU, In-Core, RAID Array. Wall time = 754 sec. Run #: PCG Solver, 1 CPU, In-Core, SATA Drive. Wall time = 16 sec. 9

10 Hyperthreading Hyperthreading allows one physical processor to appear as two logical processors to the operating system. This allows the operating system to perform two different processes simultaneously. It does not, however, allow the processor to do two of the same type of operation simultaneously (i.e. floating point operations). This form of parallel processing is only effective when a system has many lightweight tasks. 10

11 Hyperthreading and ANSYS The bolted flange analysis was run with Hyperthreading on and then again with it off to determine it s influence. Run #1: PCG Solver, 1 CPU s, Hyperthreading Off. Wall time = 754 sec. Run #: PCG Solver, 4 CPU s s, Hyperthreading On. Wall time = 766 sec. An LS-Dyna analysis was also run in the same manner as above with the following results. Run #1: 1 CPU s, Hyperthreading Off. Wall time = sec. Run #: 4 CPU s, Hyperthreading On. Wall time = 91 sec. 11

12 High Performance Computing (HPC) Product Configurations Presented by: Tony Solazzo

13 HPC Changes ANSYS HPC solutions now support multiphysics Single solution enables parallel processing for all physics and level of fidelity - fluids, structures, thermal, and electromagnetics Mechanical products : ANSYS Multiphysics, ANSYS Mechanical/Emag, ANSYS Mechanical/CFD-Flo, ANSYS Mechanical, ANSYS Structural, ANSYS Professional NLS, ANSYS Professional NLT, ANSYS AUTODYN, ANSYS AUTODYN Single Task, ANSYS Emag Fluids products : ANSYS CFD, ANSYS FLUENT, ANSYS CFX, ANSYS CFD-Flo, ANSYS Icepak, ANSYS POLYFLOW Solver products : ANSYS Multiphysics Solver, ANSYS Mechanical Solver, ANSYS Structural Solver, ANSYS Emag Solver, ANSYS CFD Solver, ANSYS FLUENT Solver, ANSYS CFX Solver, ANSYS CFD-Flo Flo Solver Eliminates the need to separately acquire and deploy parallel processing for separate simulation domains Increases the value from your overall investment in high performance computing and ANSYS multiphysics solutions 1

14 HPC Changes How are they packaged in Version 1? HPC Configurations ANSYS HPC - Individual processor based ANSYS HPC Pack - Sold in groups of processors Each simulation consumes one or more packs ANSYS HPC Workgroup - provides parallel capacity for multiple users and multiple simulations 14

15 Overview ANSYS HPC Packs ANSYS HPC Packs enable high-fidelity insight Each simulation consumes one or more packs Parallel enabled increases quickly with added packs Parallel Enabled (Cores) Packs per Simulation 15

16 Enabling Insight ANSYS HPC Packs Example Customer Owns (5) HPC Packs Can run (5) -processor based projects Parallel aa Enabled (Cores) Solver Jobs Packs per Simulation 16

17 Enabling Insight ANSYS HPC Packs Example Customer Owns (5) HPC Packs Can run () -processor based projects Can run (1) -processor based project Parallel aa Enabled (Cores) Solver Jobs Packs per Simulation 17

18 Enabling Insight ANSYS HPC Packs Example Customer Owns (5) HPC Packs Can run (1) -processor based project Can run (1) 1-processor based project Parallel aa Enabled (Cores) Solver Jobs

19 Enabling Insight ANSYS HPC Packs Example Customer Owns (5) HPC Packs Can run (1) 04-processor based project Parallel aa Enabled (Cores) Solver Jobs

20 Enabling Productivity - ANSYS HPC Workgroup Solution ANSYS HPC Workgroup provides parallel capacity for multiple users and multiple simulations Volume access to parallel processes Available in blocks from 1 to 04 processes Shared across any number of simulation tasks on single server 0

21 Enabling Productivity - ANSYS HPC Workgroup Solution ANSYS HPC Workgroup ANSYS HPC Workgroup 1 ANSYS HPC Workgroup 56 ANSYS HPC Workgroup 51 ANSYS HPC Workgroup 104 ANSYS HPC Workgroup 04 HPC Server ANSYS HPC Workgroup Parallel Block 1