HEPiX Autumn/Fall 2018 Workshop

Improving OpenMP scaling using openssl

10 Oct 2018, 16:10

20m

Aula Magna (Casa de Convalescència UAB)

Computing & Batch Services Computing & Batch Services

Speaker

Mr Jan Just Keijser (Nikhef)

Description

Scaling an OpenMP or MPI application on modern TurboBoost-enabled CPUs is getting harder and harder. Using some simple 'openssl' commands, however, it is possible to adjust OpenMP benchmarking results to correct for the TurboBoost frequencies of modern Intel and AMD CPUs. In this talk I will explain how to achieve better OpenMP scaling numbers and will show how a non-root user can determine other performance characteristics of a CPU.

Presentation materials

OpenSSL-for-OpenMP-20181010public.pdf