Intel UPI / QPI / CXL bandwidth calculation
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2019-11-09 17:17:32
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Intel QPI bandwidth and UPI
- QPI unidirectional bandwidth of a 8GT / s of: 8GT / s * 16bit / 8 = 16GB / s
- A unidirectional bandwidth of QPI 9.6GT / s of: 9.6GT / s * 16bit / 8 = 19.2GB / s
- UPI of a unidirectional bandwidth 10.4GT / s of: 10.4GT / s * 16bit / 8 = 20.8GB / s
PCIe bandwidth
- X16 unidirectional bandwidth of the PCIe Gen3: 8GT / s * 16bit / 8 * 128/130 = 16GB / s * 128b / 130b = 15.75GB / s
- X16 unidirectional bandwidth of the PCIe Gen4: 16GT / s * 16bit / 8 * 128/130 = 32GB / s * 128b / 130b = 31.51GB / s
- X16 unidirectional bandwidth of PCIe Gen5 also: 32GT / s * 16bit / 8 * 128/130 = 64GB / s * 128b / 130b = 63.01GB / s
- 32GT X16 unidirectional bandwidth of the CXL / s of: 32GT / s * 16bit / 8 * 128/130 = 64GB / s * 128b / 130b = 63.01GB / s
NVLinlk bandwidth
- There are four NVLink 1.0 Link, Link each has eight Lan, unidirectional bandwidth is: 20GT / s * 4Link * 8Lan / 8 = 80GB / s
- There are six NVLink 2.0 Link, Link each has eight Lan, unidirectional bandwidth is: 25GT / s * 6Link * 8Lan / 8 = 150GB / s
Origin www.cnblogs.com/kongchung/p/11826678.html