Compiler Flags for Different Architectures

Last updated: 3/29/19

This page lists flags that are used to compile Spatter and STREAM comparisons on different architectures.

STREAM

Some general notes for STREAM can be found at this blog post:

Additionally:

• ICC generally will generate the best quality code for STREAM and Spatter on Intel architectures.
• Streaming loads/stores may be needed to increase performance to "peak" performance.

STREAM flags per architecture

Common flags for Intel compilers with OpenMP backend: -fast -qopenmp -qopenmp-link=static -fargument-noalias

TBD - when do we use -ffreestanding?

Architecture	Short Name	Compiler	Flags	Notes
Sandy Bridge	SNB	icc	-march=sandybridge
Broadwell	BDW	icc	-march=broadwell
Skylake	SKL	icc	-march=skylake
Skylake with AVX512	SKL	icc	-march=skylake-avx512