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Questions tagged [linpack]

LINPACK is a library to measure the performance of computer systems.

LINPACK is a software library for performing numerical linear algebra on digital computers. It was written in Fortran by Jack Dongarra, Jim Bunch, Cleve Moler, and Gilbert Stewart, and was intended for use on supercomputers in the 1970s and early 1980s.It has been largely superseded by LAPACK, which runs more efficiently on modern architectures.

Original author(s)  Jack Dongarra, Jim Bunch, Cleve Moler, and Gilbert Stewart
Written in  Fortran
Type    Library
Website www.netlib.org/linpack/
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OpenMPI and OpenMP core bindings

I've read article [1] about running linpack on AMD. The execution strategy from my understanding is to have 1 MPI rank per L3 cache with 4 threads each as the l3 cache is for four physical cores. Now, by reading the article, I've got three questions…
Maxbit
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Errors running Linpack

I'm trying to run HPL Linpack on my personal laptop. I'm using CentOS 8 on a VM. Allocated cores : 6 Memory : 12.5 gb Nodes : 1 When I run with smaller values of N, its running fine, but when I try to maximise the CPU usage, with bigger values of…
Dr. S K Singhal
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Problems building HPL

I'm trying to build Linpack on my laptop. I'm running CentOS 8, along with Open MPI and blas 3.8.0. The makefile is running alright till startup and refresh, but getting an error at the build part. ERROR mpicc -o HPL_dlamch.o -c -DHPL_CALL_CBLAS…
Dr. S K Singhal
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how to edit Make.Linux_intel64 to get the same performance with Intel® Optimized MP LINPACK Benchmark

My KNL platform is based on Intel(R) Xeon Phi(TM) CPU 7250 @ 1.40GHz, 1 node, 68 cores, 96GB memory. I have some problems in linpack benchmark. When I executed Intel® Optimized MP LINPACK Benchmark following:…
Nguyen Thi My Tuyen
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LAPACK's `dtrcon` underlying algorithm

I am currently trying to reconstruct some of the function of R's kappa condition number estimation function, which estimates the condition number of a matrix X by: Working out the QR decomposition of X. Calling to LAPACK's dtrcon or LINPACK's dtrco…
JDoe2
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why is Rpeak different from Rmax when measuring performance?

Rmax is maximum performance RPeak is theorotical maximum performance. but why can't supercomputers reach Rpeak. what causes the inefficency? an explanation to the cause of inefficency.
mTarifi4
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What is the encoded variant in High-Performance Linpack Benchmark?

When I run HPL with multiple options like different problem sizes etc., the benchmark performs multiple runs on the system. In my example: multiple NBMIN multiple BCAST multiple DEPTH etc. When I then look at the single output file of the run, I…
theFinestHobo
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How to setup Linpack xtreme input parameters

I was setting up some benchmark and i need to use this benchmark tool to test my ryzen cpu and then compare results. As a request i need to test it under different number of equations. I think that there should be a lininput file to setup this…
user9114703
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What's a consistent set of Intel HPL options?

I'm trying to run the intel version of the HPL benchmark here and I'm a bit confused by the options. What I want to do (for now) is a single-node run. The node has 2x Xeon Platinum 8276 processors, so 56 cores total. So my PxQ should be 56. However…
lost
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High Performance Linpack (HPL) Compile Options with OpenMP BLAS Library

Ubuntu 20.04 64-bit aarch64 I have successfully built High Performance Linpack (HPL-2.3) from source specifying the OpenBLAS serial shared library in the HPL Make.myconfig file. HPL runs happily. I would now like to build HPL using the OpenBLAS…
John Duffy
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Disable vectorization when compiling HPL Linpack benchmark

I try to compile the netlib hpl linpack benchmark, but I want to disable vectorization. I removed all optimization flags in the make file and only have the flags -qno-openmp-simd -no-vec -no-simd set. However, when I execute the binary xhpl, the…
Luke
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OpenMPI / High-Performance Linpack Newbie Question

I have a small cluster of 4 nodes, each with 4 cores. I can happily run HP Linpack on one node, but I'm struggling to get it to run on multiple nodes. I compiled HPL-2.3 from source with OpenMPI and OpenBLAS. All seems to work well with single node…
John Duffy
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undefined reference errors: Compiling HPL Benchmark

I have been trying to compile HPL benchmark and I think after solving many problems I have come to a halt. I would appreciate help. I have installed the cblas and mpi already: Now I just get the HPL_* related undefined references in linking.…
Bibrak
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Understanding linpack input configuration

5 # number of tests 1000 2000 3000 4000 5000 # number of equations (problem sizes) 1000 2008 3000 4008 5000 # leading dimensions 4 4 2 1 1 # number of times to run a test…
sapy
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