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Knights Mill µarch
General Info
Arch Type	CPU
Designer	Intel
Manufacturer	Intel
Introduction	December 18, 2017
Phase-out	August 9, 2019
Process	14 nm
Pipeline
Type	Superscalar
OoOE	Yes
Speculative	Yes
Reg Renaming	Yes
Instructions
ISA	x86-16, x86-32, x86-64
Succession
Knights Corner Knights Hill
Contemporary
Knights Landing

Knights Mill (KNM) is a special variant of Knights Landing, a 14 nm many-core microarchitecture designed by intel for high performance computing designed specifically for the acceleration of artificial intelligence workloads.

Brands

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Release Dates

Knights Mill-based processors were introduced in December 2017.

Process Technology

See also: Broadwell § Process Technology and 14 nm lithography process

Knights Mill is fabricated on Intel's 14 nm process.

Compiler support

This section is empty; you can help add the missing info by editing this page.

Architecture

Key changes from Knights Landing

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New instructions

Knights Mill introduced a number of new instructions:

• AVX5124FMAPS - AVX-512 Fused Multiply Accumulation Packed Single precision
• AVX5124VNNIW - AVX-512 Vector Neural Network
• AVX512VPOPCNTDQ - AVX-512 Vector Population Count Doubleword and Quadword

Memory Hierarchy

• L1I Cache
  • 32 KiB, 8-way set associative
  • Per core
• L1D Cache
  • 32 KiB, 8-way set associative
  • Per core
• L2 Cache
  • 1 MiB, 16-way set associative
  • Per duplex tile

This list is incomplete; you can help by expanding it.

Overview

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Socket

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All Knights Mill Chips

	List of Knights Mill-based Processors
	Main processor
Model	Launched	Price	Family	Cores	Threads	L2$	TDP	Base	Turbo
7235	18 December 2017		Xeon Phi	64	256	32 MiB 32,768 KiB 33,554,432 B 0.0313 GiB	250 W 250,000 mW 0.335 hp 0.25 kW	1.3 GHz 1,300 MHz 1,300,000 kHz	1.4 GHz 1,400 MHz 1,400,000 kHz
7285	18 December 2017		Xeon Phi	68	272	34 MiB 34,816 KiB 35,651,584 B 0.0332 GiB	250 W 250,000 mW 0.335 hp 0.25 kW	1.3 GHz 1,300 MHz 1,300,000 kHz	1.4 GHz 1,400 MHz 1,400,000 kHz
7295	18 December 2017		Xeon Phi	72	288	36 MiB 36,864 KiB 37,748,736 B 0.0352 GiB	320 W 320,000 mW 0.429 hp 0.32 kW	1.5 GHz 1,500 MHz 1,500,000 kHz	1.6 GHz 1,600 MHz 1,600,000 kHz
Count: 3