In this blog we examine Benchmark results for Ansys Mechanical on NVIDIA GPUs. According to Ansys: Ansys benchmarks provide comprehensive and fair comparative information concerning the performance of Ansys solvers on available hardware platforms. The benchmarks can be used to compare performance of different hardware platforms when running Ansys solvers. To accomplish this goal, Ansys provides the suite of simulation cases that make up the Ansys benchmark suite to its hardware partners for their use in benchmarking hardware performance; then the data is reported to Ansys and compiled for this site. Cases are selected to represent typical usage and cover a range of mesh sizes and physical models.”

Key Findings

  1. Tesla V100S has nearly 2x better performance on models (V19sp-X) using sparse solver due to its higher FP64 performance.
  2. V100S performance is almost 2x better than RTX 6000/8000 in some cases (V19sp-X cases).
  3. Besides GPU, high core count CPU is playing an essential role on Ansys application performance. In some cases, a sole high core count processor even outperforms a solution with CPU + GPU acceleration. e.g. 2x Gold 6252 24C vs  2x 6256 12C + V100S.

System Specifications

Exxact Ansys Certified Rack-mountable Workstation – CPU: 2x Intel Xeon Gold 6256 3.60 GHz 12-Core CPUs, HT Off. GPU: NVIDIA Quadro V100S*, NVIDIA Quadro RTX 6000 Mem: 512GB RAM. Cent OS 7.7.1908 64-bit.

*NVIDIA Tesla V100S is passively cooled and recommended only if used in a rack-mounted configuration for this type workstation. 

Ansys 2019 R2 Test Cases

  • Power Supply Module (V19cg-1)
  • Tractor Rear Axle (V19cg-2)
  • Engine Block (V19cg-3)
  • Gear Box (V19ln-1)
  • Radial Impeller (V19ln-2)
  • Peltier Cooling Block (V19sp-1)
  • Semi-Submersible (V19sp-2)
  • Speaker (V19sp-3)
  • Turbine (V19sp-4)
  • BGA (V19sp-5)

Notes

The benchmarks have been designed to run in about 48 hours on current generation hardware with at least 128 GB of RAM. If changes are made when running these benchmarks, for example to run more variations of cores, if the benchmarks are run on older/slower hardware, or if hardware with less than 128GB of physical memory is used, then longer runtimes can be expected.

Ansys Benchmarks

Ansys Mechanical Run Time Benchmark: NVIDIA Tesla V100S vs Quadro RTX 6000 vs CPU Only

Cases Tesla V100S Quadro RTX 6000 CPU Only
V19cg-1 158 187 406
V19cg-2 181 224 323
V19cg-3 200 232 394
V19ln-1 158 202 298
V19ln-2 123 262 412
V19sp-1 92 177 274
V19sp-2 181 297 508
V19sp-3 117 205 309
V19sp-4 72 152 244
V19sp-5 98 205 322

 

Ansys Benchmarks – Mechanical Core Solver Rating: NVIDIA Tesla V100S vs Quadro RTX 6000 vs CPU Only

Tesla V100S Quadro RTX 6000 CPU Only
V19cg-1 902.82 734.07 273.24
V19cg-2 751.30 568.05 360.90
V19cg-3 674.47 544.42 283.00
V19ln-1 734.07 529.74 343.27
V19ln-2 799.26 350.37 216.22
V19sp-1 1102.04 528.44 330.28
V19sp-2 541.35 313.16 176.98
V19sp-3 64.36 24.07 14.68
V19sp-4 58.78 22.45 13.07
V19sp-5 31.91 12.64 7.58

 

Power Supply Module (V19cg-1)

Analysis Type Steady State Thermal
Number of Degrees of Freedom 5,300,000
Equation Solver JCG
Matrix Symmetric

Tractor Rear Axle (V19cg-2)

Analysis Type Steady Linear Thermal
Number of Degrees of Freedom 12,300,000
Equation Solver PCG
Matrix Symmetric

Engine Block (V19cg-3)

Analysis Type Static Linear Structural
Number of Degrees of Freedom 14,200,000
Equation Solver PCG
Matrix Symmetric

Gear Box (V19ln-1)

Analysis Type Modal Structural
Number of Degrees of Freedom 7,700,000
Equation Solver PCG
Matrix Symmetric

Radial Impeller (V19ln-2)

Analysis Type Modal – Cyclic Symmetry, Structural
Number of Degrees of Freedom 2,000,000
Equation Solver Block Lanczos
Matrix Symmetric

Peltier Cooling Block (V19sp-1)

Analysis Type Static Nonlinear Thermal-Electric Coupled Field
Number of Degrees of Freedom 650,000
Equation Solver Sparse
Matrix Non-symmetric (Unsymmetric)

Semi-Submersible (V19sp-2)

Analysis Type

Transient Nonlinear Structural

Number of Degrees of Freedom 4,700,000
Equation Solver Sparse
Matrix Non-symmetric (Unsymmetric)

Speaker (V19sp-3)

Analysis Type Harmonic Linear Structural
Number of Degrees of Freedom 1,700,000
Equation Solver Sparse
Matrix Non-symmetric (Unsymmetric)

Turbine (V19sp-4)

Analysis Type Static Nonlinear Structural
Number of Degrees of Freedom 3,200,000
Equation Solver Sparse
Matrix Symmetric

BGA (V19sp-5)

Analysis Type Static Nonlinear Structural
Number of Degrees of Freedom 6,000,000
Equation Solver Sparse
Matrix Symmetric

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