4 papers
ECM modeling and performance tuning of SpMV and Lattice QCD on A64FX
Christie Alappat, Nils Meyer, Jan Laukemann +4
The A64FX CPU is arguably the most powerful Arm-based processor design to date. Although it is a traditional cache-based multicore processor, its peak performance and memory bandwi…
Understanding HPC Benchmark Performance on Intel Broadwell and Cascade Lake Processors
Christie L. Alappat, Johannes Hofmann, Georg Hager +3
Hardware platforms in high performance computing are constantly getting more complex to handle even when considering multicore CPUs alone. Numerous features and configuration optio…
A Recursive Algebraic Coloring Technique for Hardware-Efficient Symmetric Sparse Matrix-Vector Multiplication
Christie L. Alappat, Georg Hager, Olaf Schenk +5
The symmetric sparse matrix-vector multiplication (SymmSpMV) is an important building block for many numerical linear algebra kernel operations or graph traversal applications. Par…
Bridging the Architecture Gap: Abstracting Performance-Relevant Properties of Modern Server Processors
Johannes Hofmann, Christie L. Alappat, Georg Hager +2
We describe a universal modeling approach for predicting single- and multicore runtime of steady-state loops on server processors. To this end we strictly differentiate between app…