The HPC Advisory Council provides best practices, that through experience and research, have shown to improve clustering and applications productivity. The HPC Advisory Council is encouraging HPC users to provide their feedback and suggest other application or HPC areas as candidates for future best practices. Installation Guides are also available and may be found on the HPC|Works page.
The Abaqus software suite consists of three core products: Abaqus/Standard, Abaqus/Explicit and Abaqus/CAE. Abaqus/Standard is a general-purpose solver using a traditional implicit integration scheme to solve finite element analyses. Abaqus/Explicit uses an explicit integration scheme to solve highly nonlinear transient dynamic and quasi-static analyses. Abaqus/CAE provides an integrated modeling (preprocessing) and visualization (post-processing) environment for the analysis products. Abaqus is used in the automotive, aerospace, and industrial product industries. The product is popular with academic and research institutions due to the wide material modeling capability, and the program's ability to be customized. Abaqus also provides a good collection of multiphysics capabilities, such as coupled acoustic-structural, piezoelectric, and structural-pore capabilities, making it attractive for production-level simulations where multiple fields need to be coupled. The presentation provides information on Abaqus performance capabilities and the effect that different HPC cluster components (HW and SW) have on it.
Widespread adoption of massively parallel deoxyribonucleic acid (DNA) sequencing instruments has prompted the development of de novo short read assembly algorithms. A common shortcoming of the available tools is their inability to efficiently assemble vast amounts of data generated from large-scale sequencing projects, such as the sequencing of individual human genomes to catalog natural genetic variation. To address this limitation, ABySS (Assembly By Short Sequences) was developed. ABySS is a parallel, paired-end sequence assembler designed for short reads, capable of assembling larger genomes and implemented using MPI. ABySS was developed at Canada's Michael Smith Genome Sciences Centre. The presentation provides information on ABySS performance capabilities and the effect that different HPC cluster components (HW and SW) have on it.
AcuSolve is a leading general-purpose finite element-based Computational Fluid Dynamics (CFD) flow solver with superior robustness, speed, and accuracy. AcuSolve can be used by designers and research engineers with all levels of expertise, either as a standalone product or seamlessly integrated into a powerful design and analysis application. With AcuSolve, users can quickly obtain quality solutions without iterating on solution procedures or worrying about mesh quality or topology. The presentation provides information on AcuSolve performance and scalability, optimization options and profiling.
Amber refers to two things: a set of molecular mechanical force fields for the simulation of biomolecules (which are in the public domain, and are used in a variety of simulation programs) and a package of molecular simulation programs which includes source code and demos. The current version of the code is Amber version 11, which is distributed by UCSF. Amber is one of the most widely used program for biomolecular studies, with an extensive user base. It is being used to for classical molecular dynamics simulations (NVT, NPT, etc), force field for biomolecular simulations, combined Quantum Mechanics/Molecular Mechanics (QM/MM) implementation and more. The presentation reviews performance, profiling and optimization techniques for Amber.
AMR is a collection of three applications for solving a wide variety of problems that benefit from grids with adaptive, inhomogeneous spatial resolution. AMR is the product of the Center for Computational Sciences and Engineering at Lawrence Berkeley National Laboratory
This particular benchmark makes use of the HyperClaw application for solving a gasdynamic problem; it is written primarily in C++. The presentation provides information on AMR performance, potential optimizations, compliers and profiling. We would like to acknowledge the DoD (Department of Defense) High Performance Computing Modernization Program for providing access to the FY 2009 benchmark suite and John Bell from Lawrence Berkeley Laboratory for developing the application.
ANSYS CFX is a high-performance, general purpose CFD program that has been applied to solve wide-ranging fluid flow problems. At the heart of ANSYS CFX is its advanced solver technology, the key to achieving reliable and accurate solutions quickly and robustly. The highly parallelized solver is the foundation for an abundant choice of physical models to capture virtually any type of phenomena related to fluid flow. The presentation provides information on CFX performance capabilities and the effect of the different HPC cluster components (HW and SW) has on it.
Cases: ANSYS FLUENT
FLUENT is a leading CFD application from ANSYS that is being used for solving fluid flow problems. The broad physical modeling capabilities of FLUENT have been applied to industrial applications ranging from air flow over an aircraft wing to combustion in a furnace, from bubble columns to glass production, from blood flow to semiconductor manufacturing, from clean room design to wastewater treatment plants. The presentation provides information FLUENT performance capabilities and the effect different HPC cluster components (HW and SW) has on it, a comparison between FLUENT 12 and 6.3 and a power aware and productivity aware usage model.
Cases: ANSYS FLUENT, CFX and Mechanics
ANSYS FLUENT is a leading CFD application from ANSYS which is widely used in almost every industry sector and manufactured products. ANSYS CFX is a high performance, general purpose CFD program where all physical models in the ANSYS CFX solver work in parallel. ANSYS Mechanics offer a broad spectrum of capabilities covering analysis types, elements, contact, materials, equation solvers and coupled physics. The following presentation provides information on all of the leading ANSYS products performance, optimizations and profiling.
BQCD (Berlin Quantum ChromoDynamics program) is a hybrid Monte-Carlo code that simulates Quantum Chromodynamics with dynamical standard Wilson fermions. The computations take place on a four-dimensional regular grid with periodic boundary conditions. The kernel of the program is a standard conjugate gradient solver with even/odd pre-conditioning. As a consequence all arrays are stored in an even/odd ordered fashion and the four indices are collapsed into a single one. The access to neighbours is handled by lists. The parallelization is done by a regular grid decomposition in the highest 3 dimensions. The values from the boundaries of the neighbouring processors are stored in the same array as the local values. The local values have indices 1, ..., volume/2. The boundary values have indices > volume/2. The memory for the arrays is dynamically allocated during initialization. Apart from rounding errors the program gives identical results for any grid decomposition (Author of the code: Dr. Hinnerk Stueben). The presentation reviews performance, profiling and optimization techniques for BQCD.
Cases: CCSM 4.0
CCSM is a coupled climate model for simulating the earth's climate. CCSM composed of four separate models: atmosphere (CAM4), ocean (POP2), land surface (CLM4) and sea-ice (CICE4). CCSM was developed in cooperation with NFS, DOE, NASA, and NCAR. The presentation provides information on CCSM productivity, how to optimize and compile the code for highest performance and efficiency, and the effect HPC cluster components (HW and SW) have on CCSM performance.
CESM (Community Earth System Model) is a coupled climate model for simulating the earth's climate system. It is composed of several models (Earth's atmosphere, Ocean, Land surface, Sea-ice). CESM allows researchers to conduct fundamental research into the earth's past, present and future climate states. CESM1.0.3 supersedes CCSM4.0. The presentation provides performance, scalability and profiling overview of CESM.
COSMO stands for Consortium for Small-scale Modeling (COSMO), which was formed in 1998 to develop, improve and maintain a non-hydrostatic limited-area atmospheric model. COSMO is a nonhydrostatic limited-area atmospheric prediction model that has been designed for both operational numerical weather prediction (NWP) and various scientific applications on the meso-β and meso-γ scale. COSMO is based on the primitive thermo-hydrodynamical equations describing compressible flow in a moist atmosphere. The model equations are formulated in rotated geographical coordinates and a generalized terrain following height coordinate. The presentations will describe COSMO profiling, performance and suggest ways for performance improvments.
CP2K is a freely available (GPL) program, written in Fortran, to perform atomistic and molecular simulations of solid state, liquid, molecular and biological systems. It provides a general framework for different methods such as density functional theory (DFT) using a mixed Gaussian and plane waves approach (GPW), and classical pair and many-body potentials. CP2K provides state-of-the-art methods for efficient and accurate atomistic simulations, sources are freely available and actively improved. It is therefore easy to give the code a try, and to make modifications as needed. The presentation includes performance benchmarks and profiling of CP2K.
Cases: (CPMD) Car-Parrinello Molecular Dynamic
Car-Parrinello Molecular Dynamics (CPMD) is an ab initio electronic structure and molecular dynamics (MD) simulation software that provides a powerful way to perform molecular dynamic simulations from first principles, using a plane wave/pseudopotential implementation of density functional theory. The CPMD code has been used to examine systems including protein active sites, liquid-surface interactions, and surface catalysts. The ability to examine interactions on the nanoscale makes this approach ideal for studying systems where chemical and biological interactions are critical. The presentations provides recommendations for improving CPMD performance, scalability, and productivity as measured in jobs per day.
Dacapo is a total energy program based on density functional theory that uses a plane wave basis for the valence electronic states. It describes core-electron interactions with Vanderbilt ultrasoft pseudo-potentials and performs molecular dynamics / structural relaxation simultaneous. Dacapo is an open-source code, maintained by Technical University of Denmark. The presentation provides information on Dacapo performance capabilities and the effect that different HPC cluster components (HW and SW) have on it.
Desmond is a software package developed at D. E. Shaw Research to perform high-speed molecular dynamics simulations of biological systems on conventional commodity clusters. The code uses novel parallel algorithms and numerical techniques to achieve high-performance and accuracy on platforms containing a large number of processors, but may also be executed on a single computer. The presentation provides information on Desmond performance capabilities and the effect that different HPC cluster components (HW and SW) have on it.
DL-POLY is a general purpose classical molecular dynamics simulation software, developed at Daresbury Laboratory by I.T. Todorov and W. Smith. DL_POLY general design provides scalable performance from a single processor workstation to a high performance parallel computer. It can be compiled a parallel application code, provided an MPI2 instrumentation is available on the parallel machine. DL_POLY offers fully parallel I/O as well as a netCDF alternative (HDF5 library dependence) to the default ASCII trajectory file. It is supplied in source form under license. The presentation provides information on DL-POLY performance capabilities and the effect that different HPC cluster components (HW and SW) have on it.
Cases: Eclipse Oil and Gas Reservoir Simulation
Reservoir simulation is a core technology used for most of the decisions undertaken in the upstream oil industry to predict plateau levels of fields, calculate the number of wells to be drilled, select well locations, estimate facility requirements, calculate reserves depletions, and design reservoir management strategies for recovering more oil and gas.
Schlumberger ECLIPSE reservoir simulation is one of the most used software solutions that allows engineers to predict and manage fluid flow more efficiently, with greater insight and better accurate modeling. The presentation provides recommendations for improving Eclipse performance, scalability, and productivity as measured in jobs per day, by exploring and profiling the software on HPC clusters.
FLOW-3D is a powerful and highly-accurate CFD software which provides engineers valuable insight into many physical flow processes. FLOW-3D is a standalone, all-inclusive CFD package, includes an integrated GUI that ties components from problem setup to post-processing.
GADGET-2 is a freely available code for cosmological N-body/SPH simulations on massively parallel computers with distributed memory. GADGET uses an explicit communication model that is implemented with the standardized MPI communication interface. The code can be run on essentially all supercomputer systems presently in use. GADGET computes gravitational forces with a hierarchical tree algorithm (optionally in combination with a particle-mesh scheme for long-range gravitational forces) and represents fluids by means of smoothed particle hydrodynamics (SPH). The code can be used for studies of isolated systems, or for simulations that include the cosmological expansion of space, both with or without periodic boundary conditions. In all these types of simulations, GADGET follows the evolution of a self-gravitating collisionless N-body system, and allows gas dynamics to be optionally included. Both the force computation and the time stepping of GADGET are fully adaptive, with a dynamic range which is, in principle, unlimited. The presentation provides info on GADGET performance, profiling and means for optimizations.
GROMACS (GROningen MAchine for Chemical Simulations) is a molecular dynamics simulation package, primarily designed for biochemical molecules like proteins, lipids and nucleic acids. There is an ongoing development to extend GROMACS with interfaces both to Quantum Chemistry and Bioinformatics/databases. GROMACS is open source software released under the GPL. The presentation provides information on GROMACS performance capabilities and the effect that different HPC cluster components (HW and SW) have on it.
The Himeno benchmark was created by Dr. Ryutaro Himeno, Director of the Advanced Center for Computing and Communication, RIKEN, Japan. The benchmark goal is to evaluate performance of incompressible fluid analysis code. This benchmark program takes measurements to proceed major loops in solving the Poisson's equation solution using the Jacobi iteration method. Being the code very simple and easy to compile and to execute, users can measure actual speed (in MFLOPS) immediately. The presentation provides information on the benchmark performance, profiling and scalability.
HYCOM is a primitive equation ocean general circulation model, evolved from the Miami Isopycnic-Coordinate Ocean Model. HYCOM provides the capability of selecting several different vertical mixing schemes for the surface mixed layer and the comparatively weak interior diapycnal mixing.
HYCOM is open source and jointly developed bythe University of Miami, Los Alamos National Laboratory, and the Naval Research Laboratory of Physics. The presentation provides information on performance optimization and application profiling. The Council would like to thank the DoD High Performance Computing Modernization Program for providing the application and benchmark cases.
ICON (ICOsahedral Non-hydrostatic General Circulation Model) is a new development initiated by the Max Planck Institute for Meteorology (MPI-M) and the Deutscher Wetterdienst (DWD). The goal of ICON is to develop a new generation of general circulation models for the atmosphere and the ocean in a unified framework. The ICON dynamical core solves the fully compressible non-hydrostatic equations of motion for simulations at very high horizontal resolution. The discretization of the continuity and tracer transport equations will be consistent so that mass of air and its constituents are conserved, which is a requirement for atmospheric chemistry. Furthermore, the vector invariant form of the momentum equation will be used, and thus, vorticity dynamics will emphasized. The presentations provide performance profiling for ICON, as well as consideration for performance optimizations.
Cases: Lattice QCD
Lattice Quantum Chromo Dynamics calculations are solving fundamental problems in particle and nuclear physics with large-scale computer calculations. The presentation includes performance evaluation and MPI profiling information.
LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator) has potentials for soft materials (biomolecules, polymers) and solid-state materials (metals, semiconductors) and coarse-grained or mesoscopic systems. It can be used to model atoms or, more generically, as a parallel particle simulator at the atomic, meso, or continuum scale. LAMMPS is distributed as an open source code under the terms of the GPL. LAMMPS is distributed by Sandia National Laboratories, a US Department of Energy laboratory. Funding for LAMMPS development has come primarily from DOE (OASCR, OBER, ASCI, LDRD, Genomes-to-Life). The presentation provides information on LAMMPS performance capabilities and the effect that different HPC cluster components (HW and SW) have on it.
Cases: (LS-DYNA) Automotive Crash Simulation
One of the most demanding applications of automotive design is crash simulation (full-frontal, offset-frontal, angle-frontal, side-impact, rear-impact and more). Crash simulations, while performed very early in the development process, are validated very late in the development process once the vehicle is completely built. The more sophisticated and complex the simulation, the more parts and details can be analyzed. Automotive makers increase their dependency for car crash simulations throughout the design process while reducing the need for real prototypes, thus achieving faster time to market with less cost associated with the design phase.
LS-DYNA is a general purpose structural and fluid analysis simulation software package capable of simulating complex real world problems. It is widely used in the automotive industry for crashworthiness, occupant safety and metal forming and also for aerospace, military and defense and consumer products. The presentation provides a deep analysis on LS-DYNA performance and scalability on HPC clusters, and provide recommendations for improving its productivity.
Cases: MILC (MIMD Lattice Computation)
MILC is a QCD code developed by the MIMD Lattice Computation (MILC) collaboration. MILC performs large scale numerical simulations to study quantum chromodynamics (QCD), the theory of the strong interactions of subatomic physics. MILC is publicly available for research purposes and distributed under GNU General Public License.
Cases: MSC Nastran
MSC Nastran is a widely used Finite Element Analysis (FEA) solver that is being used for simulating stress, dynamics, or vibration of real-world complex systems. Nearly every spacecraft, aircraft, and vehicle designed in the last 40 years has been analyzed using MSC Nastran. The presentation provides information on MSC Nastran performance and efficiency, ways for productivity optimizations and the effect HPC cluster components (HW and SW) have on MSC Nastran performance.
Cases: MR Bayes
MrBayes is a program for the Bayesian estimation of phylogeny. Bayesian inference of phylogeny is based upon a quantity called the posterior probability distribution of trees, which is the probability of a tree conditioned on the observations. The conditioning is accomplished using Bayes's theorem. The posterior probability distribution of trees is impossible to calculate analytically; instead, MrBayes uses a simulation technique called Markov chain Monte Carlo (or MCMC) to approximate the posterior probabilities of trees. The presentation gives a summary of MrBayes performance, scalability, profiling and ways for optimizations.
Cases: (MM5) The Fifth-Generation Mesoscale Model
The Fifth-Generation NCAR / Penn State Mesoscale Model (MM5) is a limited-area, nonhydrostatic or hydrostatic, terrain-following sigma-coordinate model designed to simulate or predict mesoscale and regional-scale atmospheric circulation. It has been developed at Penn State and NCAR as a community mesoscale model. Mesoscale Meteorology is the study of weather systems smaller than synoptic scale systems but larger than microscale and storm-scale cumulus systems (horizontal dimensions generally range from around 5 kilometers to several hundred kilometers).
The presentation provides information on MM5 performance capabilities and the effect of different HPC cluster components (HW and SW) on it, as well and power aware usage model.
Cases: (MPQC)The Massively Parallel Quantum Chemistry Program
MPQC computes properties of atoms and molecules from first principles using the time independent Schrödinger equation. The presentation include performance comparisons between different interconnect technologies, productivity results, power aware simulations and performance results with CPU frequency scaling.
Cases: (NAMD) Molecular Dynamics
NAMD is a parallel molecular dynamics code designed for high-performance simulations of large biomolecular systems and scales to hundreds of processors on high-end parallel platforms. NAMD was developed by the joint collaboration of the Theoretical and Computational Biophysics Group (TCB) and the Parallel Programming Laboratory (PPL) at the University of Illinois at Urbana-Champaign, and is distributed free of charge with source code. The presentation provides information on NAMD performance capabilities and the effect of different HPC cluster components (HW and SW) on NAMD.
NEMO (Nucleus for European Modeling of the Ocean) is a state-of-the-art modeling framework for oceanographic research, operational oceanography seasonal forecast and climate studies. NEMO includes 4 major components: the blue ocean (ocean dynamics, NEMO-OPA), the white ocean (sea-ice, NEMO-LIM), the green ocean (biogeochemistry, NEMO-TOP) and
the adaptative mesh refinement software (AGRIF). NEMO is used by a large community: 240 projects in 27 countries (14 in Europe, 13 elsewhere), 350 registered users (numbers for year 2008). The presentation provides performance and optimizations options for NEMO.
NWChem is a computational chemistry package developed by the Molecular Sciences Software group of the Environmental Molecular Sciences Laboratory (EMSL) at the Pacific Northwest National Laboratory (PNNL). NWChem provides many methods to compute the properties of molecular and periodic systems using standard quantum mechanical descriptions of the electronic wavefunction or density. NWChem has the capability to perform classical molecular dynamics and free energy simulations and these approaches may be combined to perform mixed quantum-mechanics and molecular-mechanics simulations. The presentation includes performance data, comparisons between mathematical libraries, and power/performance results.
Octopus is a pseudopotential real-space package aimed at the simulation of the electron-ion dynamics of one-, two-, and three-dimensional ﬁnite systems subject to time-dependent electromagnetic ﬁelds. The program is based on time-dependent density-functional theory (TDDFT) in the Kohn-Sham scheme. All quantities are expanded in a regular mesh in real space, and the simulations are performed in real time. The program has been successfully used to calculate linear and non-linear absorption spectra, harmonic spectra, laser induced fragmentation, etc. of a variety of systems. The presentation will review Octopus performance and ways to optimize its scalability.
OpenAtom is a highly scalable and portable parallel application for molecular dynamics simulations at the quantum level. It implements the Car-Parrinello ab-initio Molecular Dynamics (CPAIMD) method. OpenAtom is written using the Charm++ parallel programming framework. It runs on a variety of architectures like PowerPC, Opteron and Intel-based systems. The presentation provides information on OpenAtom productivity, how to optimize and compile the code for highest performance and efficiency, and the effect HPC cluster components (HW and SW) have on OpenAtom performance.
OpenFOAM (Open Field Operation and Manipulation) CFD Toolbox is a free, open source CFD software package produced by a commercial company, OpenCFD Ltd. It has a large user base across most areas of engineering and science, from both commercial and academic organizations. OpenFOAM has an extensive range of features to solve anything from complex fluid flows involving chemical reactions, turbulence and heat transfer, to solid dynamics and electromagnetics. The presentation provides information on OpenFOAM performance, how to optimize and compile the code for highest performance and efficiency, and the effect HPC cluster components (HW and SW) have on OpenFOAM performance.
OpenMPX (Open source package for Material eXplorer) is a software package for nano-scale material simulations based on density functional theories (DFT), norm-conserving pseudopotentials, and pseudo-atomic localized basis functions. Since the code is designed for the realization of large-scale ab initio calculations on parallel computers, it is anticipated that OpenMX can be a useful and powerful tool for nano-scale material sciences in a wide variety of systems such as bio-materials, carbon nanotubes, magnetic materials, and nanoscale conductors. The following presentation provides information on OpenMX performance, profiling and ways for optimizations.
PARATEC - PARAllel Total Energy Code performs ab-initio quantum-mechanical total energy calculations using pseudopotentials and a plane wave basis set. It is designed to run on massively parallel computing platforms and clusters and was developed through a joint collaboration between LBNL, the Université Pierre et Marie CURIE, the University of Montreal and the University of Cambridge. The presentation provides information on PARATEC productivity, how to optimize and compile the code for highest performance and efficiency, and the effect HPC cluster components (HW and SW) have on PARATEC performance.
Cases: Pretty Fast Analysis (PFA)
PFA is a software suite for analyzing large-scale molecular dynamics (MD) simulation trajectory data. PFA reads either CHARMM or AMBER style topology/trajectory files as input, and its analysis routines can scale up to thousands of compute cores or hundreds of GPU nodes with either parallel or UNIX file I/O. PFA has dynamic memory management, and each code execution can perform a variety of different structural, energetic, and file manipulation operations on a single MD trajectory at once. The code is written in a combination of Fortan90 and C, and its GPU kernels are written with NVIDIA's CUDA API to achieve maximum GPU performance. PFA is produced by research staff at the Temple University Institute for Computational Molecular Science. The presentation provides information on PFA performance and scalability.
PFLOTRAN is an application for modeling multiscale-multiphase-multicomponent subsurface reactive flows using advanced computing. The presentation provides information on PFLOTRAN performance, scalability, optimization scenarios and the performance acceleration that MPI collectives offloads technologies can bring to PFLOTRAN.
Cases: Quantum ESPRESSO
Quantum ESPRESSO stands for Open Source Package for Research in Electronic Structure, Simulation, and Optimization. It is an integrated suite of computer codes for electronic-structure calculations and materials modeling at the nanoscale. It is based on density-functional theory, plane waves and pseudopotentials (both norm-conserving and ultrasoft). The presentation provides information on Quantum ESPRESSO productivity, how to optimize and compile the code for highest performance and efficiency, and the effect HPC cluster components (HW and SW) have on Quantum ESPRESSO performance.
Altair® RADIOSS® is a leading structural analysis solver for highly non-linear problems under dynamic loadings. It is highly differentiated for scalability, quality and robustness, and consists of features for multiphysics simulation and advanced materials such as composites. RADIOSS is used across all industry worldwide to improve the crashworthiness, safety, and manufacturability of structural designs. The presentation includes profiling and performance characteristics of the application.
SPECFEM3D simulates seismic wave propagation in sedimentary basin. It can be used to simulate seismic wave propagation in complex three-dimensional geological models such as: anisotropy, attenuation, fluid-solid interfaces, rotation and self-gravitation, and crustal and mantle models. The package is written in Fortran90 and based on MPI. SPECFEM3D is open source developed by Dimitri Komatitsch at University of Pau, France, California Institute of Technology and the Princeton University. The presentation provides information on SPECFEM3D performance capabilities and the effect that different HPC cluster components (HW and SW) have on it.
Cases: STAR-CCM+ and STAR-CD
CD-adapco is a leading global provider of full-spectrum engineering simulation (CAE) solutions for fluid flow, heat transfer and stress. CD-adapco core products are the technology-leading simulation packages, STAR-CCM+ and STAR-CD. STAR-CCM+ is an engineering process oriented Computational Fluid Dynamics tool that delivers the latest CFD technology in a single integrated environment. STAR-CD is an integrated platform for performing powerful multi-physics simulations, unrivalled in its ability to tackle problems involving multi-physics and complex geometries. The presentation provides information on both STAT-CD and STAR-CCM+ performance capabilities and the effect different HPC cluster components (HW and SW) has on it, as well as a power aware and productivity aware usage model.
VASP (Vienna Ab-initio Simulation Package) performs ab-initio quantum-mechanical molecular dynamics (MD) using pseudopotentials and a plane wave basis set. The code is written in FORTRAN 90 with MPI support. Access to the code may be given by a request via the VASP website. The presentation provides information on VASP performance capabilities and the effect that different HPC cluster components (hardware and software) have on it.
The open64.diff file below contains the code changes for compiling VASP with the Open64 compiler. It works with Open64 4.5.2 compilers, ACML 5.2.0, and ScaLaPACK 2.0.2. There are some changes to the interface blocks of certain modules. It runs at comparable performance to the Intel compiler. One will need to run a command like “patch -p1 < open64.diff” to read the changes and that command will apply the changes.
The open64.makefile.diff is an example of the Makefile used to compile the build with VASP version 5.2.2. One will need to modify the directory paths in the Makefile and then run “make” to compile.
Cases: (WRF) The Weather Research and Forecast Model
The Weather Research and Forecast (WRF) Model is a fully functioning modeling system for atmospheric research and operational weather prediction communities. With an emphasis on efficiency, portability, maintainability, scalability and productivity, WRF has been successfully deployed over the years on a wide variety of HPC clustered compute nodes connected with high speed interconnects - the most used system architecture for high-performance computing. As such, understanding WRF dependency on the various clustering elements, such as the CPU, interconnects and the software libraries are crucial for enabling efficient predictions and high productivity. Our results identify WRF’s communication-sensitive points and demonstrate WRF’s dependency on high-speed networks and fast CPU-to-CPU communication. Both factors are critical to maintaining scalability and increasing productivity when adding cluster nodes. We conclude with specific recommendations for improving WRF performance, scalability, and productivity as measured in jobs per day. Because proprietary hardware and software can quickly erode cluster architecture’s favorable economics, we have restricted our investigation to standards based hardware and open source software readily available to typical research institutions.
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