The Webinar will provide an accurate overview of the HPC libraries developed at CSCS in order to accelerate electronic structure code such as CP2K and Quantum ESPRESSO. These libraries are (1) DBCSR, (2) COSMA, (3) SpFFT and (4) SIRIUS).

CSCS is working on several HPC libraries which can be adopted by electronic structure codes in order to run them efficiently on current and next-generation hybrid architectures (both NVIDIA and AMD).

**DBCSR**is a library designed to efficiently perform sparse matrix-matrix multiplication, among other operations. It is MPI and OpenMP parallel and can exploit NVIDIA and AMD GPUs via CUDA and HIP.**COSMA**is a parallel, high-performance, GPU-accelerated, matrix multiplication algorithm that is communication-optimal for all combinations of matrix dimensions, number of processors and memory sizes, without the need for any parameter tuning.**SpFFT**is a 3D FFT library for sparse frequency domain data written in C++ with support for MPI, OpenMP, CUDA, and ROCm. It was originally intended for transforms of data with spherical cutoff in frequency domain, as required by some computational materials science codes. For distributed computations, SpFFT uses a slab decomposition in space domain and pencil decomposition in frequency domain (all sparse data within a pencil must be on one rank).**SIRIUS**is a domain specific library for electronic structure calculations. It implements pseudopotential plane wave (PP-PW) and full potential linearized augmented plane wave (FP-LAPW) methods and is designed for GPU acceleration of popular community codes such as Exciting, Elk and Quantum ESPRESSO. The library is open-source (BSD 2-clause licence) and is freely available. SIRIUS is written in C++11 with MPI, OpenMP and CUDA/ROCm programming models. SIRIUS is organised as a collection of classes that abstract away the different building blocks of DFT self-consistency cycle.

**Who should attend**

Developers and advanced users of electronic structure codes for whom HPC matters.

**Key Takeaways**

If you have a large sparse or dense matrix-matrix multiplication problem, a large 3D FFT problem, or you are working on a GPU acceleration of a plane-wave DFT code, we will be happy to collaborate.

**Agenda**

11:00 - 11:05 - **Webinar Introduction **- *Anton Kozhenikov*

11:05 - 11:15 - **Overview of HPC problems arising from large scale electronic structure calculations in localised basis (CP2K) and plane-wave basis (Quantum ESPRESSO)** - *Anton Kozhenikov*

11:15 - 11:25 - **DBCSR library for sparse matrix-matrix mulitiplication **- *Shoshana Jakobovits*

11:25 - 11:35 - **COSMA library for dense matrix-matrix multiplication **- *Marko Kabic*

11:35 - 11:45 - **SpFFT library for the large scale distributed FFT **- *Simon Frasch*

11:45 - 11:55 - **SIRIUS library: full-potential and pseudopotential domain-specific library for DFT calculations **- *Anton Kozhenikov*

11:55 - 12:05 - **Q&A and Closing remarks**

**MaX webinar series**

This seminar is included in a series presenting the most recent developments of the MaX flagship codes. The next planned appointments are for **FLEUR** (September 9) and **SIESTA** (September 22). Stay tuned for the next announcements!