Intel-SandyBridge-S2-M1-C8.md

+# System
+
+* **Processor:** Intel(R) Xeon(R) CPU E5-2680
+* **Base frequency:** 2.7 GHz
+* **Number of sockets:** 2
+* **Number of memory domains per socket:** 1
+* **Number of cores per socket:** 8
+* **Number of HWThreads per core:** 2
+* **[MachineState](https://github.com/RRZE-HPC/MachineState) output:**  NA
+
+# Tool chain
+
+```
++----------+---------------------------------+
+| Compiler | icc (ICC)                       |
+|----------|---------------------------------|
+| Version  |  icc (ICC) 19.0.5.281 20190815  |
++----------+---------------------------------+
+```
+
+Optimizing flags: ```-fast -xHost -qopt-streaming-stores=always -std=c99 -ffreestanding -qopenmp```
+
+# Results
+
+All results are in ```GB/s```.
+
+Summary results:
+```
++--------------------------------------------+
+| Single core   |  	13.73 (SDaxpy)           |
+| Memory domain |  	44.59 (Sum with 7 cores) |
+| Socket        |  	44.59 (Sum with 7 cores) |
+| Node          |  	90.01 (Sum with 7 cores) |
++--------------------------------------------+
+```
+
+Results for scaling within a memory domain:
+```
+#nt	Init	Sum	Copy	Update	Triad	Daxpy	STriad	SDaxpy
+1	5.43	13.11	7.23	9.37	9.39	11.66	11.43	13.73
+2	10.82	25.05	14.21	18.31	18.44	22.61	22.29	26.47
+3	16.05	35.14	20.75	26.54	26.53	31.99	31.36	35.84
+4	21.10	41.78	26.78	32.34	33.16	36.54	36.62	38.37
+5	26.08	44.38	31.88	36.75	36.30	38.55	37.19	38.55
+6	30.75	44.32	34.89	38.13	36.72	38.64	36.95	38.43
+7	34.97	44.59	36.09	39.04	36.64	38.52	36.91	38.46
+8	37.77	44.09	36.05	38.78	36.27	38.16	36.56	38.03
+
+```
+
+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
+1	5.43	12.06
+2	10.82	23.84
+3	16.05	35.32
+4	21.10	46.22
+5	26.08	56.69
+6	30.75	66.13
+7	34.97	74.24
+8	37.77	79.30
+
+```
+
+Sum:
+```
+#nm	1	2
+1	13.11	28.39
+2	25.05	53.47
+3	35.14	71.70
+4	41.78	76.11
+5	44.38	89.85
+6	44.32	89.90
+7	44.59	90.01
+8	44.09	89.47
+
+```
+
+Copy
+```
+#nm	1	2
+1	7.23	15.75
+2	14.21	30.68
+3	20.75	44.38
+4	26.78	56.93
+5	31.88	66.67
+6	34.89	72.00
+7	36.09	73.53
+8	36.05	73.88
+
+```
+
+Update
+```
+#nm	1	2
+1	9.37	18.86
+2	18.31	36.71
+3	26.54	52.39
+4	32.34	65.25
+5	36.75	73.44
+6	38.13	76.38
+7	39.04	78.20
+8	38.78	77.95
+
+```
+
+Triad
+```
+#nm	1	2
+1	9.39	20.30
+2	18.44	39.47
+3	26.53	55.88
+4	33.16	68.87
+5	36.30	74.44
+6	36.72	74.72
+7	36.64	74.42
+8	36.27	73.86
+
+```
+
+# Scaling
+
+Memory bandwidth scaling within one memory domain:
+![Main memory bandwidth scaling plot](figures/Intel-SandyBridge-S2-M1-C8-scaling.png)
+
+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 domain scaling plot](figures/Intel-SandyBridge-S2-M1-C8-domainsInit.png)
+
+Memory bandwidth scaling across memory domains for sum
+![Memory domain scaling plot](figures/Intel-SandyBridge-S2-M1-C8-domainsSum.png)
+
+Memory bandwidth scaling across memory domains for copy
+![Memory domain scaling plot](figures/Intel-SandyBridge-S2-M1-C8-domainsCopy.png)
+
+Memory bandwidth scaling across memory domains for Triad
+![Memory domain scaling plot](figures/Intel-SandyBridge-S2-M1-C8-domainsTriad.png)