Intel Broadwell S2 M2 C18
- Processor: Intel(R) Xeon(R) CPU E5-2697 v4
- Base frequency: 2.3 GHz
- Number of sockets: 2
- Number of memory domains per socket: 2
- Memory domain specs: 2-channel DDR4-2400
- Number of cores per socket: 18
- Number of HWThreads per core: 2
- MachineState output: json
+----------+---------------------------------+
| Compiler | icc (ICC) |
|----------|---------------------------------|
| Version | icc (ICC) 19.0.5.281 20190815 |
+----------+---------------------------------+
Optimizing flags: -fast -xHost -qopt-streaming-stores=always -std=c99 -ffreestanding -qopenmp
All results are in GB/s.
Summary results:
+--------------------------------------------+
| Single core | 20.86 (Init) |
| Memory domain | 35.91 (Sum with 5 cores) |
| Socket | 72.24 (Sum with 5 cores) |
| Node | 143.81 (Sum with 5 cores) |
+--------------------------------------------+
Results for scaling within a memory domain:
#nt Init Sum Copy Update Triad Daxpy STriad SDaxpy
1 20.86 13.90 20.82 16.91 19.26 18.01 18.10 17.25
2 28.05 25.25 27.80 29.16 28.22 28.10 27.29 27.00
3 27.48 33.04 30.87 31.60 32.90 32.43 33.38 32.83
4 27.06 35.71 30.52 31.06 32.91 32.64 33.48 33.23
5 26.69 35.91 29.85 30.40 32.28 32.76 32.78 33.10
6 26.45 35.88 29.76 30.13 32.13 32.64 32.67 32.98
7 26.14 35.69 29.66 29.98 32.05 32.50 32.57 32.86
8 26.05 35.55 29.51 29.80 31.95 32.40 32.44 32.77
9 25.99 35.47 29.62 29.69 31.90 32.32 32.35 32.69
Results for scaling across memory domains. Shown are the results for the number of memory domains used (nm) with columns number of cores used per memory domain.
Init:
#nm 1 2 3 4
1 20.86 36.04 59.75 64.61
2 28.05 36.74 62.15 64.85
3 27.48 36.83 62.51 67.73
4 27.06 37.91 64.53 71.09
5 26.69 38.66 65.86 73.49
6 26.45 38.38 64.99 72.51
7 26.14 37.92 64.11 68.02
8 26.05 37.05 62.06 63.40
9 25.99 36.26 60.10 59.77
Sum:
#nm 1 2 3 4
1 13.90 27.88 41.81 55.67
2 25.25 49.34 74.03 98.44
3 33.04 64.35 95.05 127.31
4 35.71 70.44 106.14 140.19
5 35.91 72.24 107.92 143.81
6 35.88 72.15 107.78 143.59
7 35.69 71.83 107.46 142.74
8 35.55 71.40 107.06 142.29
9 35.47 71.19 106.21 141.79
Copy
#nm 1 2 3 4
1 20.82 40.37 60.70 80.41
2 27.80 55.31 87.22 110.86
3 30.87 60.09 90.59 118.45
4 30.52 59.90 88.60 117.09
5 29.85 58.87 88.76 116.53
6 29.76 58.57 87.71 115.36
7 29.66 57.98 87.07 113.70
8 29.51 57.33 86.33 112.54
9 29.62 56.83 85.43 111.88
Update
#nm 1 2 3 4
1 16.91 33.66 50.57 67.09
2 29.16 57.00 85.57 114.12
3 31.60 63.14 94.63 126.30
4 31.06 62.16 92.65 123.49
5 30.40 61.45 92.40 123.46
6 30.13 60.61 91.61 122.30
7 29.98 60.49 90.72 121.01
8 29.80 59.87 90.23 119.91
9 29.69 59.34 89.23 119.79
Triad
#nm 1 2 3 4
1 19.26 37.67 56.74 75.14
2 28.22 56.46 85.64 114.26
3 32.90 65.01 96.23 127.28
4 32.91 65.08 97.04 128.45
5 32.28 64.37 97.31 129.03
6 32.13 64.23 95.59 127.75
7 32.05 63.55 95.61 126.54
8 31.95 63.05 94.89 125.63
9 31.90 62.61 94.20 124.80
Memory bandwidth scaling within one memory domain:
The following plots illustrate the the performance scaling over multiple memory domains using different number of cores per memory domain.
Memory bandwidth scaling across memory domains for init:
Memory bandwidth scaling across memory domains for sum
Memory bandwidth scaling across memory domains for copy
Memory bandwidth scaling across memory domains for Triad
