I am trying to make an SVD function using Scalapack which utilizes a process grid to distribute an input matrix across my processors. of California, Berkeley; Univ. Here my makefile and the ScaLapack example: enter link description here. be sure to select "cluster support" (not default) during installation. AOCL-ScaLAPACK is forked from upstream Netlib ScaLAPACK GitHub repository. ScaLAPACK is designed for heterogeneous computing and is portable on any computer that supports MPI or PVM. Those step by steps have been mostly. 04. I have at work. There have been over sixty-eight million web hits at (for the associated libraries LAPACK, ScaLAPACK, CLA-PACK and LAPACK95). This pdf file provides a comprehensive introduction to the basics of VASP, a popular software for electronic structure calculations. gutheil at fz-juelich. tgz2) cd scalapack-2. of Colorado Denver; and NAG Ltd. sbt is a core critical component of Tapad's tech stack. Visit Stack ExchangeScaLAPACK1) tar zxvf scalapack-2. LOCp( M ) = NUMROC( M, MB_A, MYROW, RSRC_A, NPROW ), LOCq( N ) = NUMROC( N, NB_A, MYCOL, CSRC_A, NPCOL ). I got following linking errors: gfortran -o dsimpletest -O dsimpletest. In general there may be several processes on a processor, in which case we. ScaLAPACK then uses the PBLAS and BLACS to perform BLAS-like operations, but in a distributed SPMD fashion, which become a mix of communication between processes, and BLAS operations within the processes, more-or-less. I am a student and this is my first time using MKL. A standard build of the latter can be constructed automatically by running configure with --build-scalapack (requires cmake to build ScaLAPACK, manual build can also be provided along by providing the library path). The development of new high-performance numerical libraries is complex, accounting for the extreme level of parallelism,Getting Help and Support What's New Notational Conventions Overview OpenMP* Offload BLAS and Sparse BLAS Routines LAPACK Routines ScaLAPACK Routines Sparse Solver Routines Graph Routines Extended Eigensolver Routines Vector Mathematical Functions Statistical Functions Fourier Transform Functions PBLAS Routines Partial Differential. Sample session: [(it_css:dnairn)@mills scaex]$ vpkg_devrequire scalapack Adding dependency. 4. It is a continu- ation of the LAPACK project, wlfich designed and produced analogous software for workstations, vector supercomputers, and shared memory parallel computers. 250000 12874. hpp This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. headers and . edu Zizhong Chen chen@cs. In general, BLAS and BLACS are considered as the low-level components that needs to be optimized for different. Furthermore, the subroutine along with scalapack thinks that A is of size (8,8), instead of (4,4) which you allocated in the main program, allowing the subroutine to overrun available memory. Regards, Konstantin. (For such machines, the memory hierarchy. Reload to refresh your session. Could you provide please a simple example which uses MPI and the Intel OneAPI routines of ScaLapack to invert large matrix. Fix argument mismatches for implicitly defined functions (for gcc-10+ compatibility), PR #26. ScaLAPACK will run on any machine where both the BLAS and the BLACS are available. scivision. If you did not select "cluster support" - just rerun the installation, and select "modify installation" and check the box. Faster transposition in Cyclops is made possible by the HPTT library. In theabsence of such a runtimesystem, ScaLAPACK assumes oneAbstract: This paper outlines the content and performance of ScaLAPACK, a collection of mathematical software for linear algebra computations on distributed memory computers. Keywords. The importance of developing standards for computational and message passing interfaces is discussed. For example, use module load scalapack/2. Connect and share knowledge within a single location. The function in scalapack for LU decomposition is pdgetrf_. This is just the version where you have atlas and scalapack installed in the /opt/ directory. The fundamental building blocks of the ScaLAPACK library are distributed memory versions of the Level 1, 2 and 3 BLAS, and a set of Basic Linear Algebra Communication Subprograms for communication tasks that arise frequently in parallel linear algebra computations. 0. For Option (1) MKL works on. 0, an open-source library under the modified BSD license and can be downloaded freely from Netlib (. FT-ScaLAPACK: Correcting Soft Errors On-Line for ScaLAPACK Cholesky, QR, and LU Factorization Routines Panruo Wu [email protected] matrix should be distributed correctly. The example1. The Python-based implementations as well as Python bindings to the libMBD C API are accessible from the Python package called pyMBD. /PORD/lib/ -lpord . Abstract: ScaLAPACK is a library of high-performance linear algebra routines for distributed-memory message-passing MIMD computers and networks of workstations supporting PVM [68] and/or MPI [64, 110]. h で宣言さ. Advanced Topics in Packaging. You can also solve standard eigenvalue problems. The MAGMA Sparse and MAGMA Batched packages have been included since MAGMA 1. But if this happens during many bands step of single shot GW (G0W0), then changing ALGO is not possible as for this step exact diagonalization is needed. org. The ScaLAPACK library includes certain LAPACK routines, Anderson, et al. 1 day ago · I am trying to make an SVD function using Scalapack which utilizes a process grid to distribute an input matrix across my processors. Install gcc, OpenMPI and OpenMP using homebrew. ScaLAPACK 2. de Thu Jul 18 09:07:21 CDT 2013. This guide is intended for developers or administrators who want to package software so that Spack can install it. There's a fishy piece of dimensioning in your code which can easily be responsible for the segfault. It also suggests to use two void functions. 306 * NUMROC is a ScaLAPACK tool functions; 307 * PJLAENV is a ScaLAPACK envionmental inquiry function 308 * MYROW, MYCOL, NPROW and NPCOL can be determined by callingFor context, ScaLAPACK was first released in 1995, some 25 years ago. Presumably ilcm is from scalapack, not sure what the library name is. /lib/libmumps_common. In general there may be several processes on a processor, in which case we assume that the runtime system handles the scheduling of processes. The authors describe ScaLAPACK, a distributed memory version of the LAPACK software package for dense and banded matrix computations. 0, released in February 2, 2022. - spack/package. But CPPScaLapack needs BLACS, PBLAS and ScaLAPACK installed. ScaLAPACK is designed for heterogeneous computing and is portable on any computer that supports MPI or PVM . Keywords. The library contains routines to solve all types of matrices including dense and banded systems and has algorithms to solve some of the core problems in. Intel® Math Kernel Library (Intel® MKL) (Doc) intel-mkl-full. In the absence of such a runtime system, ScaLAPACK assumes oneTeams. Could you tell me please what do I do wrong (I am new with ScaLAPACK)? Thank you and best wishes. Learn more about TeamsScaLAPACK Sparse BLAS Sparse solvers. 00D+00 end do end do and then simply multiply Matrix A by Vector x (b=Ax). Dated Mar 28, 2022. Install siesta library dependencies from source 4. Consider appending hdf5 if you want to compile VASP with HDF5 support. lawn124 . A faster library for dense tensor contractions in shared memory is Libtensor. For example: $ dpkg --get-selections | grep -v deinstall | grep zip. 0. Dynamic Linking. It is a library of high-performance linear algebra routines for distributed memory message-passing MIMD computers and networks of workstations supporting parallel virtual machine (PVM) and/or message passing interface (MPI). Could you provide please a simple example which uses MPI and the Intel OneAPI routines of ScaLapack to invert large matrix. In this note we summarize the difference between these routines. Programming with Big Data in R fully utilizes ScaLAPACK and two-dimensional block cyclic decomposition for Big Data statistical analysis which is an. When the matrix is distributed over many processors it takes less time and larger order matrices can be inverted. I am confused that a call to the ScaLAPACK TOOLS routine SL_INIT initializes the process grid and routine Cblacs_gridinit( &ictxt, "Row", nprow, npcol ) is also for initializing a grid (I saw that in fortran sample code). ScaLAPACK 2. It is a high-performance numerical linear algebra library designed for use on distributed memory systems. 4 * -- ScaLAPACK tools routine (version 1. Sorted by: 1. ScaLAPACK solves dense and banded linear systems, least squares problems, eigenvalue problems, and singular value problems. Release 2. /lib/libdmumps. 2. This is why I want to share my understanding of SCALAPACK here. Q&A for work. a worstation which has 1TB RAM and 64 cores with 2 GPU RTX A6000 which gives 96GB. NVPL ScaLAPACK. ISBN 0-89871-397-8; The list price for SIAM members is $39. or if you want to activate always the silent mode you can write in your config. Supported processor families are AMD EPYC™, AMD Ryzen™, and AMD Ryzen™ Threadripper™ processors. ScaLAPACK Routines In this appendix, we review the subroutine naming scheme for ScaLAPACK and indicate by means of a table which subroutines are included in this release. List of statistical packages. The first part of this paper presents the design of ScaLAPACK. In this tutorial we learn how to install scalapack-common on CentOS 8. ScaLAPACK provides routines for solving:You haven't told us anything about your results from basic investigation. The documentation is included inside the repository, but is also available at. of Colorado Denver; and NAG Ltd. Libc. Different tasks can mean different input problem sizes or the same input problem. An Asynchronous Parallel Supernodal Algorithm for Sparse Gaussian Elimination. So it sounds to me like you'll either need to create a new Spack package for the blas/lapack you have on your system or choose an existing package that's close enough. Note that the input matrices must be symmetric and moreover the latter one must be positive definite (only real-valued matrices are supported now). The reference functions are. SLATE was conceived to be a replacement for ScaLAPACK, boasting superior performance and scalability in HPC’s modern. . In the absence of such a runtime system, ScaLAPACK assumes one Teams. Add a comment | 1 I downloaded conda and now it works just fine. do i=1,n x(i) = i*i*1. It is there - even for the community (free) version. This release of ScaLAPACK extends the functionality of the package by providing new routines for the nonsymmetric eigenproblem, divide and conquer symmetric eigenproblem, and improved routines for generalized symmetric eigenproblem and the. Scalable Linear Algebra Package - Dev files for OpenMPI. a -L scalapack/. Linear Algebra; Block Size; Message Passing; Mathematical Software; Float. Learn more…. ScaLAPACK is a library of high-performance linear algebra routines for distributed-memory message-passing MIMD computers and networks of workstations supporting PVM [ 1] and/or MPI [ 2, 3 ]. The conda-forge organization contains one repository for each of the installable packages. g. mpic++ cpp_scalapack_example. This goal is achieved by separating low-level machine dependent components while keeping the overall implementation similar to the sequential version of the code. This is done by BLACS and grid setup. I am trying to do a Cholesky decomposition via pdpotrf () of MKL-Intel's library, which uses ScaLAPACK. Fund open source developers. 2. In your main program you set. fax: 215-386-7999. e. 1. Run the Test Suite (s). To review, open the file in an editor that reveals hidden Unicode characters. intel. To associate your repository with the lapack topic, visit your repo's landing page and select "manage topics. Add this topic to your repo. Set the appropriate init parameter before calling MUMPS API in the linking test code. Q&A for scientists using computers to solve scientific problems. This issue covers apparently very basic build trouble on the path to package ScaLAPACK for pkgsrc, so I hope an issue is warranted. The square block scattered decomposition is. . AOCL-ScaLAPACK is optimized for AMD “Zen”-based processors. Post Reply Reply. CONFIG = icc-mkl-impi. g. Key resign features are the use of distributed versions of the Level 3 BLAS as building blocks, and an object-based interface to the library routines. This article discusses the core factorization routines included in the ScaLAPACK library. Visit Stack Exchange. It can be used to solve linear systems, least squares problems, eigenvalue problems, and singular value problems. I am interesting in applying a Cholesky factorization to a SPD huge matrix and then invert it. Find and fix vulnerabilitiesTo install ScaLAPACK on your system, install the BLACS first (see above), then: Obtain the latest distribution from the SCALAPACK website. h> #include <mkl_blacs. The associated matrix factorizations (LU, Cholesky, QR, SVD, Schur, generalized Schur) are. links ScaLAPACK LU with CUBLAS using a software em-ulation layer; This method exhibits worse performance than the existing ScaLAPACK LU using only CPUs because of the large data transfer latency overhead between the CPU and GPU. Hello, During linking my c++ project I get erros like below. ScaLAPACK VS Solution Requirement: Visual Studio, Microsoft MPI, Intel and C Fortran compiler Step by step to run example For each library, we are providing a quick step-by-step tutorial to get you started. 0. Release 2. When attempting to build ScaLAPACK with GCC 10, compiling BLACS code produced many errors of the type Rank mismatch between actual argument at (1) a. , matrix multiplication, rank-k update, triangular solve), linear systems solvers, least square solvers, singular value. Download cmake and install it on your machine. ScaLAPACK is a library of high-performance linear algebra routines designed for distributed memory MIMD (Multiple Instruction Stream Multiple Data Stream) parallel computers. ucr. Finally, this paper briefly describes future directions for the ScaLAPACK library and concludes by suggesting alternative approaches to mathematical libraries, explaining how ScaLAPACK could be integrated into efficient and user-friendly distributed systems. It depends on the external libraries BLAS. Dhillon and Jack J. SLATE will deliver fundamental dense linear algebra capabilities for current and upcoming distributed-memory systems, including GPU-accelerated systems as well as more traditional multi core-only systems. 230000 10190. ScaLAPACK is a library of high performance linear algebra routines for distributed memory MIMD computers. 16 tasks --> 3624 MB lost; 49 tasks --> 7341 MB lost; To eliminate all MKL, I recompiled scalapack using the blas/lapack in openblas (an older version, 0. Examples. We unlock the potential of millions of people worldwide. Like LAPACK, the ScaLAPACK routines are based on block. Cleary and J. This is because I had projects where Scalapack was optional. To be clear, I. It seems that using Scalapack without anything is very verbose and I was wondering if anyone has packed this into Fortran 2003 objects. so. Learn more…. ScaLAPACK uses the default (typically 4-byte) integers. Download our custom 'arch. a. Set the appropriate init parameter before calling MUMPS API in the linking test code. Dependencies. edu Department of Computer Science and Engineering University of California, Riverside Riverside, CA 92521 ABSTRACT It is well known that soft errors in linear. The C++ prototype of this function is as follows: void pdgetrf_( int *m, // (global) The number of rows in the distributed matrix sub (A) int *n, // (global) The number of columns in the distributed matrix sub (A) // (local) Pointer into the local memory to an array of local size. undefined symbol means a library included in headers is not linked to the shared object and that library's symbol cannot be found. We also list the driver routines. If your matrix is sparse, i. Initalizing the system for use of the ScaLAPACK libraries is dependent on the system you are using and the compiler you are using. Once the include file has been modified, the entire installation process (including the building of testing executables) can be performed by typing ``make'' in the top-level ScaLAPACK directory. How often does your computation. ScaLAPACK. When I do: mpif77 example1. To demonstrate this functionality, here are two sample lists: numbers = [ 1, 2, 3] // python val numbers = List ( 1, 2, 3) // scala. The ScaLAPACK (Scalable LAPACK) library includes a subset of LAPACK routines redesigned for distributed mem-ory MIMD parallel computers. 1. import PyScalapack scalapack = PyScalapack("libscalapack. 1. This ScaLAPACK tutorial begins with a brief description of the LAPACK library. 7 of ScaLAPACK. ScaLAPACK routines to reduce a real 1-!en eral matrix to Hessenberg or bidiagonal form. Learn more about clone URLs Download ZIP. This release of ScaLAPACK extends the functionality of the package by. of Tennessee; Univ. Install Xcode command line tools. MUNGED_33215 caused collective abort of all ranks exit status of rank 0: return code 174 A failure. What is scalapack-test-common. Actually, OpenACC is a lot like OpenMP but targeting acceleration devices such as GPUs. Programming with Big Data in R fully utilizes ScaLAPACK and two-dimensional block cyclic decomposition for Big Data statistical analysis which is an extension. such as zgemm(), zgeev(), then you can get familar with the notations in lapack and scalapack. linalg 或 scipy. For work, lwork, iwork, etc: set lwork=0 and they should be allocated internally by the subroutine as needed, no need to pass them in. cpp This file contains bidirectional Unicode text that may be. Add this topic to your repo. Q&A for work. brew install gcc openmpi scalapack fftw qd openblas. For example, use module load. Thank you for finding it out. It examines the building of the ship, life onboard during its maiden voyage, tragic decisions made that fateful night, the discovery ofScaLAPACK . cpp -o cpp_mpi_scalapack -L/opt/scalapack/lib/ -lscalapack -L/opt/atlas/lib/ -llapack -lf77blas -lcblas -latlas -lgfortran In ScaLAPACK, algorithms are presented in terms of processes, rather than physical processors. ScaLAPACK solves dense and banded linear. . 7 of ScaLAPACK. ScaLAPACK, or Scalable LAPACK, is a library of high performance linear. Collectives™ on Stack Overflow. ScaLAPACK aims to provide both efficiency and portability. 3. Generated by. The two dimensional block cyclic data decomposition will be presented, followed by a discussion of the underlying. Improve this answer. com documentation a simple example of matrix inversion with ScaLapack. Click here to start Table of Contents ScaLAPACK Tutorial Outline Outline continued Introduction High-Performance Computing Today Growth of Microprocessor Performance Scalable Multiprocessors Performance Numbers on RISC Processors The Maturation of Highly Parallel Technology Architecture Alternatives Directions The printed version of the ScaLAPACK Users' Guide is available from SIAM. 2. 60; the cost for nonmembers is $49. IntroductionGeneralities about ScaLAPACK - How does it work?TutorialDiscussion about performancesReferences Tutorial-0:HowtoinstalltheScaLAPACKlibraryScaLAPACK: Scalable Linear Algebra PACKage. LAPACK is written in Fortran 90 and provides routines for solving systems of simultaneous linear equations, least-squares solutions of linear systems of equations, eigenvalue problems, and singular value. algebra routines for distributed memory computers supporting MPI. 485 Views. However, there are many special cases. Top users. 1ノードに複数のMPIプロセスを立ち上げることで,複数のGPUを使用することができます.ただし,その際には cudaSetDevice により各プロセスにどのGPUを使用するか指定する必要があります.. f902 Answers. LAPACK and ScaLAPACK currently deal mostly with dense matrices, although some sparse matrix software is available, with more on the way. If I use scalapack and pblas, and the code is run in serial (1x1 blacs process grid), how well does scalapack and pblas revert to the performance of lapack/blas? I am particularly interested in the. Then, your packages. Thank you for anwer and best wishes. h> #include <mkl_pblas. As the name suggests, RScaLAPACK is a library built for the R statistical environment using the. AOCL is a set of numerical libraries optimized for AMD processors based on the AMD “Zen” core architecture and generations. 0 Kudos. :collection of packages. ScaLAPACK Users Guide Reviews The recipes in this book are simple and nutritious, so you can cook fast, but eat slow, with appreciation and mindful awareness of every delicious bite. 7. . v2. The only way is to download ScaLAPACK & BLACS from NETLIB, build them with platform_mpi and change MKL scalapack and blacs libraries with the built ones, but leave other MKL libraries as is in order to use MKL BLAS. 0 release includes a default setting of basic linear algebra communication subprograms (BLACS) [24, 25]. SLATE is meant to be this replacement, boasting superior performance and scalability in modern, heterogeneous, distributed-memory environments. NVPL Documentation; NVPL. The programs solve commonly occurring problems in dense linear. Linear Algebra; Block Size; Message Passing; Mathematical. Some anomalies in the old routine are. Learn how to set up and run VASP calculations for different types of systems, such as atoms, molecules and solids, and how to analyze the results. Everything works fine when the dimension of the SPD matrix is even. adep: debhelper-compat (= 12) Package not available adep: cmake cross-platform, open-source make system adep: mpi-default-dev Standard MPI development files (metapackage) adep: mpi-default-bin Standard MPI runtime programs (metapackage)Automatic detection of MPI variables with mpif90 ¶. As of version 2. tgz. ScalaPy is a Scala library developed by Shadaj Laddad. Messages sorted by: Previous message: [petsc-users] installing petsc with scalapack from mkl. The importance of block-partitioned algorithms in reducing the. In general there may be several processes on a processor, in which case we assume that the runtime system handles thescheduling of processes. I know there is a C interface. example_pdpotrf. It is a library of high-performance linear algebra routines for distributed memory message-passing MIMD computers and networks of workstations supporting parallel virtual machine (PVM) and/or message passing interface (MPI). mkl_core. I would prefer to use impi/intel-mkl given how quickly that combination solves my problems. New features: Allow compilation in ILP64 mode, PR #19. AMD optimized ScaLAPACK 2. The second word ScaLAPACK stands for a library of high-performance linear algebra routines for distributed-memory message passing MIMD computers and networks of work stations supporting PVM and/or MPI. mpi4py 进阶之 scalapy. cfg from the config/aster folder and replace the on in the aster-full-src-14. Finally, this paper briefly describes future directions for the ScaLAPACK library and concludes by suggesting alternative approaches to mathematical libraries, explaining how ScaLAPACK could be integrated into efficient and user-friendly distributed systems. age (LAPACK) and the Scalable Linear Algebra PACKage (ScaLAPACK), the combination of which is abbreviated Sca/LAPACK, aim to enhance and update these libraries for the ongoing revolution in processor. 0), my memory loss is much smaller (for example, ~7300 MB with intel, ~200 MB with openmpi), but my code runs significantly slower. 2. com] The following binary packages are built from this source package: intel-mkl. most trusted online community for developers to learn, share their knowledge, and build their careers. into ScaLAPACK; Improved ease of use, e. 23) cp SLmake. In general there may be several processes on a processor, in which case we assume that the runtime system handles thescheduling of processes. make' file for GCC + OpenMPI/MPICH build 4. Please use any of these. The goals of the Sca/LAPACK projects are to provide efficiency, portability, scalability, flexibility, reliability, ease of maintenance, and ease of use software for computational science problems. For that reason, I would like to use MKL wi. 6: If the location of the mpif90 command is part of your PATH env. h". Scalapack es principalmente para sistemas de álgebra lineal intensiva y similar a una tira, que proporciona varios álgebra lineal, como varias operaciones de matriz, descomposición de matrices, ecuaciones lineales, problemas mínimos cuadrados, problemas de emisión, valores singulares, etc. However, when it's odd, pdpotrf () thinks that the matrix is not positive. We first learn the implementation structure of LAPACK, its. N/A. You can use module spider scalapack to view available modules. What is scalapack-mpich. 2. As a little feed back to you, I've tested the latest PETSc and confirmed both "configure" command and compilation work fine. algebra routines for distributed memory computers supporting MPI. Learn more about CollectivesScaLAPACK is designed for heterogeneous computing and is portable on any computer that supports MPI or PVM. You will need to build a dynamically linked library ( _gpaw. [petsc-users] Fwd: PETSc installation on Intrepid. Alexei_Yakovlev. libMBD is included in FHI-aims, Quantum Espresso, DFTB+, and ESL. of California, Berkeley; Univ. Sc. Major bug fixes: Use pointer macro to prevent integer overflow, PR #16. 2. Once you have your matrix stored in some sparse. LAPACK is written in Fortran 90 and provides routines for solving systems of simultaneous linear equations, least-squares solutions of linear systems of equations, eigenvalue problems, and singular value. Packaging Guide. This paper outlines the content and performance of ScaLAPACK, a collection of mathematical software for linear algebra computations on distributed memory computers. Subscribe. On these machines, LINPACK and EISPACK are inefficient because their memory access patterns disregard the multi-layered memory hierarchies. , via friendlier interfaces in multiple languages. conda-forge is a community-led conda channel of installable packages. Matrices should bestoredas 1d array (A [ i + lda*j ], not A) To invoke ScaLAPACK routines in your. LAPACK is written in Fortran 90 and provides routines for solving systems of simultaneous linear equations, least-squares solutions of linear systems of equations, eigenvalue problems, and singular value. Also included: - PBLAS, Parallel Basic Linear Algebra Subprograms - BLACS, Basic Linear Algebra Communication Subprograms Netlib Scalapack. Host and manage packages Security. However, from running the example I linked to, the distribution seems to happen like the 2D right-up corner in your answer and it works with Cholesky's ScaLAPACK (I checked). 61. Open. 06-03-2006 01:45 PM. After a brief discussion of the BLAS and LAPACK, the block cyclic data layout, the BLACS, the PBLAS (Parallel BLAS), and the algo- rithms used are discussed. ucr. 16. EXPND=XNDIM=4 NUM_DIM=2*EXPND !NPROW==1 for a single-process test ALLOCATE (MATTODIAG (XNDIM,XNDIM)) ! MATTODIAG (4,4) Then you pass your MATTODIAG, the Hermitian matrix, to. ScaLAPACK is a library of high-performance linear algebra routines for parallel distributed memory machines. Order code SE04. Hello all, I am trying to run scalapack using ifort 11. Build siesta executable 5. However, that combo uses the most memory. undefined symbol means a library included in headers is not linked to the shared object and that library's symbol cannot be found. Hello, During linking my c++ project I get erros like below. By default, the about to be released GCC 10 is more strict about Fortran argument types. It assumes that you have at least some familiarity with Python, and that you’ve read the basic usage guide, especially the part about specs. I have the chance to use many computers for that purpose, thus I am only interested in distributed solutions. 1ノード内で複数のGPUを使用する場合.