1. Jul. 7th 2012 OpenFOAM Study Meeting for beginner @ Kansai Masashi Imano
Masashi Imano
SGI OpenFOAM Cloud
Benchmark
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2. Jul. 7th 2012 OpenFOAM Study Meeting for beginner @ Kansai Masashi Imano
Test cluster conditions
• Hardware: SGI Altix ICE8200
• CPU: Intel Xeon X5365 3.00GHz 4cores x 2
• Node: 16 nodes
• Memory: 16GB/node (No swap memory)
• Interconnect: InfiniBand DDR
• OS: SUSE LINUX ENTERPRISE SERVER 10.3
• MPI:
✓ SGI MPT (1.2.6)
✓ OpenMPI
(ThirdParty package distributed with OpenFOAM)
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3. Jul. 7th 2012 OpenFOAM Study Meeting for beginner @ Kansai Masashi Imano
• OpenFOAM versions: 2.1.x
• MPI:
✓ OpenMPI (Ver. 1.5.3, mpirun options: --mca btl openib,self,sm)
✓ SGI MPT (Ver.1.2.6)
• Benchmark problem
✓ Flow: Lid-driven 2D cavity (tutorials)
✓ Re: 100 (laminar)
✓ solver: icoFoam (piso)
✓ Linear solver: AMG (p), PBiCG (U)
✓ Mesh:
S(500 2,Δt:5x10-5 s), M(1000 2, Δt:10-5 s), L(2000 2, Δt:10-5 s)
x
Ux = 1 m/s
d = 0.1 m
y
Calculation conditions
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4. Jul. 7th 2012 OpenFOAM Study Meeting for beginner @ Kansai Masashi Imano
Benchmark results
0
37500
75000
112500
150000
1 2 4 8
127000
140000
80000
15940
10810
21700
60000
37700
Timesteps/Day
Number of Nodes
OpenMPI SGI MPT
Mesh: S (5002= 1/4 Millions)
4

5. Jul. 7th 2012 OpenFOAM Study Meeting for beginner @ Kansai Masashi Imano
Benchmark results
0
2500
5000
7500
10000
1 2 4 8
8470
9240
5520
3260
4620
6240
4940
317
Timesteps/Day
Number of Nodes
OpenMPI SGI MPT
Mesh: M (10002 =1 Million)
80%up
50%up
5

6. Jul. 7th 2012 OpenFOAM Study Meeting for beginner @ Kansai Masashi Imano
Benchmark results
0
750
1500
2250
3000
1 2 4 8
2520
1560
510
280
1780
1430
450
260
Timesteps/Day
Number of Nodes
OpenMPI SGI MPT
Mesh: L (20002 =4 Millions)
40%up
6

7. Jul. 7th 2012 OpenFOAM Study Meeting for beginner @ Kansai Masashi Imano
Any Questions?
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