Intel Xeon Skylake SP 6148

Owned by Robert Schade
Last updated: May 28, 2022 by xinwu
1 min read

The compute nodes of Noctua 1 have dual-socket Intel Xeon Skylake SP 6148 CPUs.

Important Properties

SMT (aka. Hyperthreading)

SMT is disabled on Noctua 1.

Instruction Set

The Intel Xeon 6148 (Skylake SP) CPUs can do up to 512-bit SIMD, i.e. AVX512.

NUMA-Domains

Sub-NUMA Clustering (SNC) is disabled on CPUs. That means that there are 2 NUMA domains per node.

Topology

Because SNC is disabled, one CPU socket is a NUMA domain. There are 2 NUMA domains in one compute node.

The layout of a node is:

Specification

The specification is as follows:

Property

normal

Property

normal

CPUs

2x Intel® Xeon® Gold 6148 Processor

Microarchitecture

Skylake (server)

Cores per node in total

40

Cores per socket

20

Sockets per node

2

SMT

off

L3 Cache per socket

27.5 MB

TDP per socket

150 W

Base frequency

2.40 GHz

Max. Boost frequency

3.70 GHz

Main memory

192 GB DDR4 2666 MHz

Memory channel per socket

6

Memory bandwidth (Stream triad)

~ 196 GB/s

Floating-Point Performance (single-node HPL)

~ 1.9 TFLOP/s

Floating-Point Performance (single-node HPCG)

~ 37.3 GFLOP/s

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