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August 18, 2018, 21:36
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Epyc 7551 vs 6850K; Ansys Mechanical Bench
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#1 |
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Member
Join Date: Dec 2016
Posts: 44
Rep Power: 9  |
Case descriptions
https://www.dropbox.com/s/my9cv21ga1...tions.pdf?dl=0 results: Case V18cg-1 Power Supply Module Static, linear, thermal Solver "JCG, real value, symmetric" 5266730 nodes ; 2303613 elements Memory total in MB-> 37000 Epyc 7551 @ 2,55 Multiply with A Memory Bandwidth : 101.03 GB/s Multiply with A MFLOP Rate : 10848.33 MFlops TOTAL PCG SOLVER SOLUTION CP TIME = 334.27 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 334.49 secs 2x Epyc 7301 @ 2,7 TOTAL PCG SOLVER SOLUTION CP TIME = 367.422 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 367.438 secs Core-7 6850k @ 4,0: Multiply with A Memory Bandwidth : 57.44 GB/s Multiply with A MFLOP Rate : 6167.20 MFlops TOTAL PCG SOLVER SOLUTION CP TIME = 567.59 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 568.02 secs 6850K @ GTX 780 6 GB Multiply with A Memory Bandwidth : 221.38 GB/s Multiply with A MFLOP Rate : 23770.00 MFlops TOTAL PCG SOLVER SOLUTION CP TIME = 232.23 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 232.20 secs ------------------------------------------------------------- Case V18cg-2 Tractor Rear Axle Static, linear, structural Solver "PCG, real-value, symmetric, msave,off" 12329235 nodes ; 2366046 elements Memory total in MB-> 39000 Epyc 7551 @ 2,55 Multiply with A Memory Bandwidth : 173.46 GB/s Multiply with A MFLOP Rate : 18625.56 MFlops Solve With Precond MFLOP Rate : 14404.20 MFlops Precond Factoring MFLOP Rate : 32734.42 MFlops TOTAL PCG SOLVER SOLUTION CP TIME = 182.94 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 183.33 secs 2x Epyc 7301 @ 2,7 Multiply with A Memory Bandwidth : 166.65 GB/s Multiply with A GFLOP Rate : 17.89 GFlops Solve With Precond GFLOP Rate : 13.73 GFlops Precond Factoring GFLOP Rate : 35.39 GFlops TOTAL PCG SOLVER SOLUTION CP TIME = 189.09 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 189.42 secs Core-7 6850k @ 4,0: Multiply with A Memory Bandwidth : 86.34 GB/s Multiply with A MFLOP Rate : 9270.32 MFlops Solve With Precond MFLOP Rate : 8265.42 MFlops Precond Factoring MFLOP Rate : 45436.20 MFlops TOTAL PCG SOLVER SOLUTION CP TIME = 373.34 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 373.88 secs --------------------------------------- Case V18sp-4 Turbine Static, nonlinear, structural, 5 cumulative iteration Solver "sparse, real-value, symmetric" 1063750 nodes ; 726480 elements in core solution Epyc 7551 @ 2,55 Memory total in MB-> 63824 CPU Time 1 iteration(sec) = 364.688 ELAPSED Time 1 iteration(sec) = 364.970 ELAPSED Time 2016.406 computational rate (mflops) for solve = 16502.2230 // 16558.9734 effective I/O rate (MB/sec) for solve = 62873.4690 // 63089.6879 2x Epyc 7301 @ 2,7 CPU Time 1 iteration(sec) = 294.906 ELAPSED Time 1 iteration(sec) = 295.166 ELAPSED Time 1600.359 Core-7 6850k @ 4,0: Memory total in MB-> 53350 CPU Time 1 iteration(sec) = 227.500 ELAPSED Time 1 iteration(sec) = 227.582 ELAPSED Time 1334.969 computational rate (mflops) for solve = 9143.7185 // 9162.1949 effective I/O rate (MB/sec) for solve = 34837.5672 // 34907.9622 6850K @ GTX 780 6 GB "" ------------------------------------ out of core solution Epyc 7551 @ 2,55 Memory total in MB-> 18248 CPU Time 1 iteration(sec) = 531.719 ELAPSED Time 1 iteration(sec) = 561.629 ELAPSED Time 2763.203 computational rate (mflops) for solve = 2929.6081 // 656.7220 effective I/O rate (MB/sec) for solve = 11161.8068 // 2502.1107 Core-7 6850k @ 4,0: Memory total in MB-> 8569 CPU Time 1 iteration(sec) = 262.656 ELAPSED Time 1 iteration(sec) = 283.993 ELAPSED Time 1487.516 computational rate (mflops) for solve = 1697.0636 // 736.2777 effective I/O rate (MB/sec) for solve = 6465.8122 // 2805.2182 -------------------------------------------------------------------------------------------------- Case V18sp-5 BGA Transient, nonlinear, structural, 3 cumulative iteration Solver "sparse, real-value, symmetric" 2073970 nodes ; 1266427 elements in core solution Epyc 7551 @ 2,55 Memory total in MB-> 87124 CPU Time 1 iteration(sec) = 337.578 ELAPSED Time 1 iteration(sec) = 338.200 ELAPSED Time 1209.125 computational rate (mflops) for solve = 18414.8072 // 18384.2639 effective I/O rate (MB/sec) for solve = 70160.4145 // 70044.0444 Core-7 6850k @ 4,0: Memory total in MB-> 73015 CPU Time 1 iteration(sec) = 276.281 ELAPSED Time 1 iteration(sec) = 277.488 ELAPSED Time 1011.047 computational rate (mflops) for solve = 8489.0170 // 8474.9668 effective I/O rate (MB/sec) for solve = 32343.1543 // 32289.6233 Epyc 7551 vs 6850k without GPU acceleration / 2:2 Epyc 7551 vs 6850k with GPU acceleration / 1:3 The GTX 780 have to small memory size for the cases. Last edited by Duke711; August 22, 2018 at 16:15. |
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August 19, 2018, 07:50
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Super Moderator
Alex
Join Date: Jun 2012
Location: Germany
Posts: 3,427
Rep Power: 49 |
Thanks for your efforts. A little more information about the systems would be nice.
Operating system, Memory configuration , SMT settings, drive used for out-of-core... |
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August 19, 2018, 12:04
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#3 | |
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Member
Join Date: Dec 2016
Posts: 44
Rep Power: 9 |
Quote:
Win10 Epyc @ 8x 32 GB 2400 Mhz // SMT on // 5x Samsung 970 Evo Raid 0 6850K @ 8x 16 GB 2400 Mhz // SMT on // 5x Samsung 970 Evo Raid 0 https://www.dropbox.com/s/0jt7sm7irl...annt2.jpg?dl=0 |
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August 19, 2018, 12:08
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#4 |
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Member
Join Date: Jun 2010
Posts: 77
Rep Power: 16 |
The performance of modern CPUs is stunning and reminds me how dated my workstation is...
My system is: Win10 Supermicro X8DTi-F 2x Xeon X5670 96GB DDR3 ECC RAM / 1333Mhz (2x 3x16GB modules) SMT-off 500GB Samsung 860EVO SSD drive And here are my results for the first benchmark: Case V18cg-1 Power Supply Module Static, linear, thermal Solver "JCG, real value, symmetric" 5266730 nodes ; 2303613 elements Equation solver computational rate: 3.4 Gflops TOTAL PCG SOLVER SOLUTION CP TIME = 1159.828 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 1178.000 secs Case V18cg-2 Tractor Rear Axle Static, linear, structural Solver "PCG, real-value, symmetric, msave,off" 12329235 nodes ; 2366046 elements Multiply with A Memory Bandwidth : 46.65 GB/s Multiply with A GFLOP Rate : 5.01 GFlops Solve With Precond GFLOP Rate : 4.37 GFlops Precond Factoring GFLOP Rate : 20.42 GFlops CP Time(sec) = 822.375 Elapsed Time (sec) = 856.000 |
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August 22, 2018, 16:13
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#5 |
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Member
Join Date: Dec 2016
Posts: 44
Rep Power: 9 |
Update
2x Epyc 7301 @ 2,7 Case V18cg-1 Power Supply Module Static, linear, thermal Solver "JCG, real value, symmetric" 5266730 nodes ; 2303613 elements Memory total in MB-> 37000 2x Epyc 7301 @ 2,7 TOTAL PCG SOLVER SOLUTION CP TIME = 367.422 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 367.438 secs ------------------------------------------------------------ Case V18cg-2 Tractor Rear Axle Static, linear, structural Solver "PCG, real-value, symmetric, msave,off" 12329235 nodes ; 2366046 elements Memory total in MB-> 39000 2x Epyc 7301 @ 2,7 Multiply with A Memory Bandwidth : 166.65 GB/s Multiply with A GFLOP Rate : 17.89 GFlops Solve With Precond GFLOP Rate : 13.73 GFlops Precond Factoring GFLOP Rate : 35.39 GFlops TOTAL PCG SOLVER SOLUTION CP TIME = 189.09 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 189.42 secs -------------------------------------------------------------------- Case V18sp-4 Turbine Static, nonlinear, structural, 5 cumulative iteration Solver "sparse, real-value, symmetric" 1063750 nodes ; 726480 elements in core solution 2x Epyc 7301 @ 2,7 Memory total in MB-> 63824 CPU Time 1 iteration(sec) = 294.906 ELAPSED Time 1 iteration(sec) = 295.166 ELAPSED Time 1600.359 -------------------------- SMT off: Case V18cg-1 TOTAL PCG SOLVER SOLUTION CP TIME = 374.16 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 375.54 secs Multiply with A Memory Bandwidth : 84.69 GB/s Multiply with A GFLOP Rate : 9.09 GFlops --------------------------------------- Case V18cg-2 TOTAL PCG SOLVER SOLUTION CP TIME = 230.58 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 232.76 secs Multiply with A Memory Bandwidth : 129.47 GB/s Multiply with A GFLOP Rate : 13.90 GFlops Solve With Precond GFLOP Rate : 12.64 GFlops Precond Factoring GFLOP Rate : 41.05 GFlops ------------------------------ Case V18sp-4 DSP Matrix Solver CPU Time (sec) = 280.375 DSP Matrix Solver ELAPSED Time (sec) = 281.834 1599.297 |
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August 23, 2018, 01:58
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#6 |
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Member
Join Date: Jun 2010
Posts: 77
Rep Power: 16 |
How is possible that the i7-6850k is that much faster than a dual Xeon X5670? Is that all down to DDR4 memory that makes the difference?
Realistically, should i expect a 2x E5-2690V2 (20 cores in total but DDR3 RAM) system to be even faster than the 6850k (6 cores)? 6850k Multiply with A Memory Bandwidth : 86.34 GB/s Multiply with A MFLOP Rate : 9270.32 MFlops Solve With Precond MFLOP Rate : 8265.42 MFlops Precond Factoring MFLOP Rate : 45436.20 MFlops TOTAL PCG SOLVER SOLUTION CP TIME = 373.34 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 373.88 secs 2x X5670 Multiply with A Memory Bandwidth : 46.65 GB/s Multiply with A GFLOP Rate : 5.01 GFlops Solve With Precond GFLOP Rate : 4.37 GFlops Precond Factoring GFLOP Rate : 20.42 GFlops CP Time(sec) = 822.375 Elapsed Time (sec) = 856.000 |
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August 23, 2018, 02:44
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#7 | |
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Senior Member
Join Date: May 2012
Posts: 552
Rep Power: 16 |
Quote:
Assuming mechanical calculations behave similar to CFD calculations then: The X5670 system has a total of 6 memory channels with 1333 MHz memory. The 6850k system has a total of 4 memory channels with 2400 MHz memory. So the 6850k has more available bandwidth. I guess none of the systems are completely bandwidth limited though. But the Broadwell based system should have much better IPC compared to the Westmere system and it is also higher clocked. A used dual 2690v2 seems to be a sweet-spot in terms of price performance right now, at least for CFD. |
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August 23, 2018, 11:35
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#8 |
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Member
Join Date: Jun 2010
Posts: 77
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Effects of SMT
CG-2 mechanical benchmark 2x X5670 96GB ECC DDR3 1333Mhz / 2 x 3 x 16GB DIMMs SMT-OFF Multiply with A Memory Bandwidth : 54.65 GB/s Multiply with A GFLOP Rate : 5.87 GFlops Solve With Precond GFLOP Rate : 4.92 GFlops Precond Factoring GFLOP Rate 23.03 GFlops : CP Time(sec) = 744.312 Elapsed Time (sec) = 753.000 CG-2 mechanical benchmark 2x X5670 96GB ECC DDR3 1333Mhz / 2 x 3 x 16GB DIMMs SMT-ON Multiply with A Memory Bandwidth : 65.05 GB/s Multiply with A GFLOP Rate : 6.98 GFlops Solve With Precond GFLOP Rate : 5.83 GFlops Precond Factoring GFLOP Rate24.09 GFlops CP Time(sec) = 674.297 Elapsed Time (sec) = 675.000 |
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April 3, 2019, 11:11
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#9 |
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Member
Join Date: Dec 2016
Posts: 44
Rep Power: 9 |
Update
Case V18cg-1 Power Supply Module Static, linear, thermal Solver "JCG, real value, symmetric" 5266730 nodes ; 2303613 elements Memory total in MB-> 37000 2x E5 2670 0 @ 3 // pc 12800 Multiply with A Memory Bandwidth : 57.99 GB/s Multiply with A MFLOP Rate : 6.23 GFlops TOTAL PCG SOLVER SOLUTION CP TIME = 567.13 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 568.62 secs Case V18cg-2 Tractor Rear Axle Static, linear, structural Solver "PCG, real-value, symmetric, msave,off" 12329235 nodes ; 2366046 elements Memory total in MB-> 39000 2x E5 2670 0 @ 3 // pc 12800 Multiply with A Memory Bandwidth : 104.42 GB/s Multiply with A MFLOP Rate : 11.21 GFlops TOTAL PCG SOLVER SOLUTION CP TIME = 320.83 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 324.05 secs Case V18sp-4 Turbine Static, nonlinear, structural, 5 cumulative iteration Solver "sparse, real-value, symmetric" 1063750 nodes ; 726480 elements 2x E5 2670 0 @ 3 // pc 12800 CPU Time 1 iteration(sec) = ELAPSED Time 1 iteration(sec) = 670.812 ELAPSED Time 3354.06 Last edited by Duke711; April 3, 2019 at 16:51. |
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July 21, 2019, 08:13
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#10 |
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Member
Join Date: Jun 2010
Posts: 77
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Case V18sp-4
Turbine Static, nonlinear, structural, 5 cumulative iteration Solver "sparse, real-value, symmetric" 1063750 nodes ; 726480 elements 2x X5670 96GB ECC DDR3 1333Mhz / 2 x 3 x 16GB SMT-OFF EQUIL ITER 1 CPU TIME = 507.9 ELAPSED TIME = 526.7 The solution converged in the 3rd iteration, so i can't compare the total elapsed time for 5 iterations. How my system is so fast in this case?  In comparison: 2x E5 2670 0 @ 3 // pc 12800 ELAPSED Time 1 iteration(sec) = 670.812 2x Epyc 7301 @ 2,7 CPU Time 1 iteration(sec) = 294.906 ELAPSED Time 1 iteration(sec) = 295.166 |
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July 22, 2019, 05:54
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#11 |
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New Member
Erik
Join Date: Jul 2019
Posts: 7
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It could be some missing ram or faulty populated ram for loosing fully functional octachannel memorybandwidth in the E5 system.
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July 22, 2019, 10:41
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#12 | |
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Member
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Quote:
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July 29, 2019, 14:24
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#13 |
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Member
Join Date: Dec 2016
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Case V18sp-4
Turbine Static, nonlinear, structural, 5 cumulative iteration Solver "sparse, real-value, symmetric" 1063750 nodes ; 726480 elements in core solution 2x E5 2670 0 @ 2,99 Ghz ; 1600 MHz --smt off 100% 83/512 GB CPU Time 1 iteration(sec) = 255.516 ELAPSED Time 1 iteration(sec) = 259.342 ELAPSED Time 1434.203 --smt on 59% 76/512 GB CPU Time 1 iteration(sec) = 263.545 ELAPSED Time 1 iteration(sec) = 267.312 ELAPSED Time 1384.131 6850K @ 4,2 Ghz ; 3000 MHz ---smt on 61% 67/128 GB CPU Time 1 iteration(sec) = 262.542 ELAPSED Time 1 iteration(sec) = 263.535 ELAPSED Time 1392.321 second run: CPU Time 1 iteration(sec) = 360.516 ELAPSED Time 1 iteration(sec) = 366.171 ELAPSED Time 1989.312 smp; shared memory parallel CPU Time 1 iteration(sec) = 1245.609 ELAPSED Time 1 iteration(sec) = 1257.387 6850K @ 4,0 Ghz ; 2400 MHz CPU Time 1 iteration(sec) = 262.656 ELAPSED Time 1 iteration(sec) = 283.993 ELAPSED Time 1487.516 -> non linear is not a good benchmark case, elapsed time per iteration very different. Sparse solver in core: -> Number of core's has not a effect -> CPU frequency has not a effect -> Memory frequency has not a effect. Because the memory bandwith, core per memory channel are very important: Dual Epyc 7301 --> 2 core per channel 6850K --> 1,5 core per channel Dual E5 2670 --> 2 core per channel Single Epyc 7551 --> 4 core per channel and very slowly 7551 best results: CPU Time 1 iteration(sec) = 531.719 ELAPSED Time 1 iteration(sec) = 561.629 ELAPSED Time 2763.203 |
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July 29, 2019, 14:43
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#14 |
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Member
Join Date: Jun 2010
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I will make the same benchmark with a dual E5-2650V2 setup soon to see how it performs.
Epyc7551 is very slow and i think this is due to its low base frequency. I think it would perform way better in a larger case. You could run the sp5 benchmark which is more demanding. It would be interesting to see how an Intel Scalable setup performs on these FEA benchmarks. |
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July 29, 2019, 15:04
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#15 |
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Member
Join Date: Dec 2016
Posts: 44
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I think the best Setup for
JCG (thermal) Solver is - eight core cpu with a Tesla and lot of vram, in fea the graphic card run only in medium or low power mode PCG Solver or iterative is - big cpu with a lot of core's Sparse Solver or direct is - six core cpu with low power consumption For fea is a multi cpu plattform with very high power consumption not a good idea. Only for CFD. |
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July 29, 2019, 15:21
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#16 |
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Member
Join Date: Jun 2010
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Duke,
I make most of my FEA runs in iterative mode just because i would need tons of RAM to run them on sparse. So, i think that for large FEA cases where you most often use iterative mode, multi-core CPUs or multi-CPU platform is the way to go. For smaller FEA cases what you need is a fast 6 or 8 core CPU. |
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July 29, 2019, 16:47
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#17 |
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Member
Join Date: Dec 2016
Posts: 44
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The convergence by the interative or PCG solver ist not guatanteed and for non linear problems or high element distortion the sparse solver is much more stable and faster then the PCG solver. PCG solver is good and fast for linear or simple problems.
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November 28, 2019, 08:11
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#18 |
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Member
Join Date: Jun 2010
Posts: 77
Rep Power: 16 |
Case V18sp-4
Turbine Static, nonlinear, structural, 5 cumulative iteration Solver "sparse, real-value, symmetric" 1063750 nodes ; 726480 elements in core solution --------------------------------------------------------------------------------------------------------------------------- 2x E5-2650V2 @ 3Ghz (16cores total) (For some reason my CPUs stopped at 3GHz max and didn't go to 3.2GHz) 128GB DDR3 RAM (not perfectly populated due to MB issues) Total memory allocated for solver = 61088.564 MB ITER 1 / DSP Matrix Solver / CPU Time (sec) = 219.969 ITER 1 / DSP Matrix Solver / ELAPSED Time (sec) = 220.744 EQUIL ITER 1 CPU TIME = 231.7 ELAPSED TIME = 232.6 TOTAL ELAPSED TIME FOR 5 iterations = 1597.000 Equation solver computational rate: 151.0 Gflops Equation solver effective I/O rate: 2.4 GB/sec ----------------------------------------------------------------------------------------------------------- If we compare this to Duke711's benchmark using 2x Epyc7301 we will be a bit shocked. 2x Epyc 7301 @ 2,7 (32cores total) CPU Time 1 iteration(sec) = 294.906 ELAPSED Time 1 iteration(sec) = 295.166 ELAPSED Time 1600.359 |
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November 28, 2019, 08:38
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#19 |
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Member
Join Date: Jun 2010
Posts: 77
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Case V18cg-1
Power Supply Module Static, linear, thermal Solver "JCG, real value, symmetric" 5266730 nodes ; 2303613 elements ---------------------------------------------------------------------------- 2x E5-2650V2 @ 3Ghz (16cores total) (For some reason my CPUs stopped at 3GHz max and didn't go to 3.2GHz) 128GB DDR3 RAM (not perfectly populated due to MB issues) Multiply with A Memory Bandwidth : 82.14 GB/s Multiply with A MFLOP Rate : 8.82 GFlops TOTAL PCG SOLVER SOLUTION CP TIME = 463.53 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 463.91 secs ----------------------------------------------------------------------------------- (DUKE711) Epyc 7551 @ 2,55 Multiply with A Memory Bandwidth : 101.03 GB/s Multiply with A MFLOP Rate : 10848.33 MFlops TOTAL PCG SOLVER SOLUTION CP TIME = 334.27 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 334.49 secs 2x Epyc 7301 @ 2,7 TOTAL PCG SOLVER SOLUTION CP TIME = 367.422 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 367.438 secs Core-7 6850k @ 4,0: Multiply with A Memory Bandwidth : 57.44 GB/s Multiply with A MFLOP Rate : 6167.20 MFlops TOTAL PCG SOLVER SOLUTION CP TIME = 567.59 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 568.02 secs |
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November 28, 2019, 09:08
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#20 |
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Member
Join Date: Jun 2010
Posts: 77
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Case V18cg-2
Tractor Rear Axle Static, linear, structural Solver "PCG, real-value, symmetric, msave,off" 12329235 nodes ; 2366046 elements ---------------------------------------------------------------------------- 2x E5-2650V2 @ 3Ghz (16cores total) (For some reason my CPUs stopped at 3GHz max and didn't go to 3.2GHz) 128GB DDR3 RAM (not perfectly populated due to MB issues) Multiply with A Memory Bandwidth : 86.31 GB/s Multiply with A MFLOP Rate : 9.27 GFlops Solve With Precond MFLOP Rate : 7.87 GFlops Precond Factoring MFLOP Rate : 30.77 GFlops TOTAL PCG SOLVER SOLUTION CP TIME = 373.69 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 375.29 secs ---------------------------------------------------------------------------------- DUKE711 2x Epyc 7301 @ 2,7 Multiply with A Memory Bandwidth : 166.65 GB/s Multiply with A GFLOP Rate : 17.89 GFlops Solve With Precond GFLOP Rate : 13.73 GFlops Precond Factoring GFLOP Rate : 35.39 GFlops TOTAL PCG SOLVER SOLUTION CP TIME = 189.09 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 189.42 secs Core-7 6850k @ 4,0: Multiply with A Memory Bandwidth : 86.34 GB/s Multiply with A MFLOP Rate : 9270.32 MFlops Solve With Precond MFLOP Rate : 8265.42 MFlops Precond Factoring MFLOP Rate : 45436.20 MFlops TOTAL PCG SOLVER SOLUTION CP TIME = 373.34 secs TOTAL PCG SOLVER SOLUTION ELAPSED TIME = 373.88 secs |
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Linear Mode
