SkyLake-SP: A 14nm 28-Core xeon® processor

Simon M. Tam, Harry Muljono, Min Huang, Sitaraman Iyer, Kalapi Royneogi, Nagmohan Satti, Rizwan Qureshi, Wei Chen, Tom Wang, Hubert Hsieh, Sujal Vora, Eddie Wang

Abstract: SkyLake-SP (Scalable Performance), code name SKX, is the next generation Xeon® server processor fabricated on the Intel® 14nm tri-gate CMOS technology with 11-metal layers [1,2]. The SKX processor family has three core-count configurations. Each SKX core is accompanied by 1MB of dedicated L2 (2 ^nd level cache) and 1.375MB of non-exclusive L3 (3 ^rd level cache). At its maximum configuration of 28 cores, the SKX processor supports 6 DDR4 channels (2666MT/s), 3×20-lanes UPI processor-to-processor links (10.4GT/s) and x48+4 PCIE links (8GT/s). SKX supports per-core power-performance optimization enabled by on-die integrated voltage regulators (FIVR) [3, 4]. A new 2-dimensional synchronous on-die MESH fabric interconnects all the on-die components. Fig. 2.1.1 shows the overall architecture of the SKX processor.