# \#hpc

**URL:** https://discourse.julialang.org/tag/hpc/62.md

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

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## [\[ANN\] KaimonSlate.jl: a reactive environment for ambitious work](https://discourse.julialang.org/t/ann-kaimonslate-jl-a-reactive-environment-for-ambitious-work/139185)

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**Author:** [@kahliburke](https://discourse.julialang.org/u/kahliburke)\
**Replies:** 23\
**Last updated:** [September 24, 2026, 11:27pm UTC](https://discourse.julialang.org/t/ann-kaimonslate-jl-a-reactive-environment-for-ambitious-work/139185 "2026-09-24T23:27:10Z")

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I’ve been building KaimonSlate.jl, a reactive computing environment for Julia, for a while now. It’s fully available in General, and I’d like to take a quick tour of it here. Julia got rid of the two-language problem. S…

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## [\[ANN\] Enumlib.jl: a package for derivative structure enumeration](https://discourse.julialang.org/t/ann-enumlib-jl-a-package-for-derivative-structure-enumeration/139475)

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**Author:** [@Gus\_Hart](https://discourse.julialang.org/u/Gus_Hart)\
**Replies:** 0\
**Last updated:** [September 15, 2026, 2:29am UTC](https://discourse.julialang.org/t/ann-enumlib-jl-a-package-for-derivative-structure-enumeration/139475 "2026-09-15T02:29:31Z")

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Most users of my original enumlib will go on calling it (this new code) from inside Python, obliviously—so this probably appeals only to a handful of computational materials scientists here. But it is the culmination of …

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## [AOCLFFTZ.jl v5.3.2](https://discourse.julialang.org/t/aoclfftz-jl-v5-3-2/139243)

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**Author:** [@aelobdog](https://discourse.julialang.org/u/aelobdog)\
**Replies:** 0\
**Last updated:** [September 7, 2026, 2:14pm UTC](https://discourse.julialang.org/t/aoclfftz-jl-v5-3-2/139243 "2026-09-07T14:14:37Z")

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Hello, AOCL-FFTZ is AMD’s in-house Fast Fourier Transform (FFT) library is purpose-built and optimized for Zen-based processors, delivering improved computational performance and faster execution of FFT workloads on AMD…

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## [Implementing GPU Multi-Stream Capabilities to Dagger.jl](https://discourse.julialang.org/t/implementing-gpu-multi-stream-capabilities-to-dagger-jl/139013)

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**Author:** [@camarav](https://discourse.julialang.org/u/camarav)\
**Replies:** 1\
**Last updated:** [August 27, 2026, 6:45pm UTC](https://discourse.julialang.org/t/implementing-gpu-multi-stream-capabilities-to-dagger-jl/139013 "2026-08-27T18:45:30Z")

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Hello everyone! this post will be interesting especially for those who enjoy using 100% of what your computer has to offer, this summer I was part of GSoC and worked to implement multi-streams capabilities for GPUs in Da…

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## [AOCL.jl v5.3.1](https://discourse.julialang.org/t/aocl-jl-v5-3-1/138718)

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**Author:** [@agodbole](https://discourse.julialang.org/u/agodbole)\
**Replies:** 8\
**Last updated:** [August 14, 2026, 5:48am UTC](https://discourse.julialang.org/t/aocl-jl-v5-3-1/138718 "2026-08-14T05:48:05Z")

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Hello all, AOCL is a set of numerical libraries optimized for AMD processors built on the AMD “Zen” architecture, spanning multiple generations. It supports AMD EPYC™, AMD Ryzen™, and AMD Ryzen™ Threadripper™ processor …

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## [\[ANN\] Training course “Julia for HPC” in Stuttgart, Germany on Sep 29-Oct 2, 2026](https://discourse.julialang.org/t/ann-training-course-julia-for-hpc-in-stuttgart-germany-on-sep-29-oct-2-2026/137435)

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**Author:** [@carstenbauer](https://discourse.julialang.org/u/carstenbauer)\
**Replies:** 2\
**Last updated:** [June 8, 2026, 12:07pm UTC](https://discourse.julialang.org/t/ann-training-course-julia-for-hpc-in-stuttgart-germany-on-sep-29-oct-2-2026/137435 "2026-06-08T12:07:30Z")

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For the fifth year in a row (see e.g. here or here or here) I’m pleased to annouce that there will be another opportunity to learn more about using Julia for high-performance computing this fall! In collaboration with t…

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## [Number of threads assigned via SLURM](https://discourse.julialang.org/t/number-of-threads-assigned-via-slurm/136820)

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**Author:** [@pulk\_jain](https://discourse.julialang.org/u/pulk_jain)\
**Replies:** 5\
**Last updated:** [April 24, 2026, 4:50am UTC](https://discourse.julialang.org/t/number-of-threads-assigned-via-slurm/136820 "2026-04-24T04:50:26Z")

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I am trying to run some multi-threaded code on a cluster using SLURM. #SBATCH --cpus-per-task=4 JPATH=$HOME/.juliaup/bin export JULIA\_DEPOT\_PATH="/my/storage/dir/.julia:" export JULIA\_NUM\_THREADS=auto $JPATH/julia main\_…

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## [\[ANN\] JACC.jl v1.0 now available for 100% portable CPU/GPU code](https://discourse.julialang.org/t/ann-jacc-jl-v1-0-now-available-for-100-portable-cpu-gpu-code/136231)

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**Author:** [@williamfgc](https://discourse.julialang.org/u/williamfgc)\
**Replies:** 4\
**Last updated:** [March 17, 2026, 4:31pm UTC](https://discourse.julialang.org/t/ann-jacc-jl-v1-0-now-available-for-100-portable-cpu-gpu-code/136231 "2026-03-17T16:31:21Z")

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We are pleased to announce the first stable release of JACC.jl v1.0 - Julia for ACCelerators https://github.com/JuliaGPU/JACC.jl - feel free to star the repo. What’s different? :white\_check\_mark: Single-source Julia cod…

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## [Minisymposium on Partial Differential Equations and its Applications (Juliacon 2026)](https://discourse.julialang.org/t/minisymposium-on-partial-differential-equations-and-its-applications-juliacon-2026/135600)

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**Author:** [@Arpit\_Babbar](https://discourse.julialang.org/u/Arpit_Babbar)\
**Replies:** 0\
**Last updated:** [February 12, 2026, 4:40pm UTC](https://discourse.julialang.org/t/minisymposium-on-partial-differential-equations-and-its-applications-juliacon-2026/135600 "2026-02-12T16:40:45Z")

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We are eager to receive talk contributions for our minisymposium on partial differential equations (PDE) at Juliacon 2026. The minisymposium will cover everything that relates to Julia and PDEs, including but not limited…

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## [Multithreading non-contiguous mapreduction over huge matrices](https://discourse.julialang.org/t/multithreading-non-contiguous-mapreduction-over-huge-matrices/134413)

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**Author:** [@noetheriankoala](https://discourse.julialang.org/u/noetheriankoala)\
**Replies:** 5\
**Last updated:** [December 8, 2025, 7:36am UTC](https://discourse.julialang.org/t/multithreading-non-contiguous-mapreduction-over-huge-matrices/134413 "2025-12-08T07:36:45Z")

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Hello! A version of the following function is majorly bottle-necking a project I am working on and I could use help speeding it up. In all the below code, A is an k x n matrix, l is a length-n vector, and q is a length n…

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## [Ask for official guide for Julia installation, deployment and use on Linux cluster](https://discourse.julialang.org/t/ask-for-official-guide-for-julia-installation-deployment-and-use-on-linux-cluster/109396)

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**Author:** [@WuSiren](https://discourse.julialang.org/u/WuSiren)\
**Replies:** 31\
**Last updated:** [December 1, 2025, 11:10am UTC](https://discourse.julialang.org/t/ask-for-official-guide-for-julia-installation-deployment-and-use-on-linux-cluster/109396 "2025-12-01T11:10:11Z")

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Is there any official guide for Julia installation, deployment and use on Linux cluster to someone who is new to both Julia and cluster like me? Known: As far as I know, the cluster uses SLURM for task scheduling; I was…

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## [Running out of disk space on HPC without really doing anything unusual](https://discourse.julialang.org/t/running-out-of-disk-space-on-hpc-without-really-doing-anything-unusual/131812)

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**Author:** [@Torkel](https://discourse.julialang.org/u/Torkel)\
**Replies:** 3\
**Last updated:** [August 25, 2025, 9:53am UTC](https://discourse.julialang.org/t/running-out-of-disk-space-on-hpc-without-really-doing-anything-unusual/131812 "2025-08-25T09:53:46Z")

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I have some workflows that I am running on an HPC, and I have suddenly run out of space, preventing me from actually doing anything. The actual scripts and stuff I have created corresponds to 2 MB, and I have reached the…

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## [What is the correct way to use multiple GPUs in Slurm cluster?](https://discourse.julialang.org/t/what-is-the-correct-way-to-use-multiple-gpus-in-slurm-cluster/131740)

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**Author:** [@ytdHuang](https://discourse.julialang.org/u/ytdHuang)\
**Replies:** 0\
**Last updated:** [August 20, 2025, 3:52pm UTC](https://discourse.julialang.org/t/what-is-the-correct-way-to-use-multiple-gpus-in-slurm-cluster/131740 "2025-08-20T15:52:11Z")

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Hello Julia community, I am trying to distribute my computation using multiple GPUs in Slurm cluster. The code can be executed correctly while I’m using single GPU board in Slurm. However, when I try to use more than on…

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## [Running Cplex.jl on HPC cluster](https://discourse.julialang.org/t/running-cplex-jl-on-hpc-cluster/131601)

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**Author:** [@Ely](https://discourse.julialang.org/u/Ely)\
**Replies:** 2\
**Last updated:** [August 16, 2025, 4:43am UTC](https://discourse.julialang.org/t/running-cplex-jl-on-hpc-cluster/131601 "2025-08-16T04:43:16Z")

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Hi everyone, Any idea please why my julia script on HPC can’t build or add the cplex package on the hpc cluster ? If i already have the Cplex path on the server, how can i properly export it in my sh (bash) file ? Th…

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## [How to disable print-outs when plotting (for \`savefig\` on e.g. hpc)](https://discourse.julialang.org/t/how-to-disable-print-outs-when-plotting-for-savefig-on-e-g-hpc/131592)

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**Author:** [@Torkel](https://discourse.julialang.org/u/Torkel)\
**Replies:** 0\
**Last updated:** [August 13, 2025, 5:27pm UTC](https://discourse.julialang.org/t/how-to-disable-print-outs-when-plotting-for-savefig-on-e-g-hpc/131592 "2025-08-13T17:27:21Z")

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I am running some code on a hpc server (both interactively in the terminal and using slurm). As part of the process I am getting print outs like qt.qpa.xcb: could not connect to display localhost:13.0 qt.qpa.plugin: Fro…

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## [GPU/CPU Agnostic FFT code](https://discourse.julialang.org/t/gpu-cpu-agnostic-fft-code/126283)

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**Author:** [@bpsomu](https://discourse.julialang.org/u/bpsomu)\
**Replies:** 7\
**Last updated:** [June 10, 2025, 10:21am UTC](https://discourse.julialang.org/t/gpu-cpu-agnostic-fft-code/126283 "2025-06-10T10:21:49Z")

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I am looking to port my Professor’s 15 year old C++ code to Julia in a GPU/CPU Agnostic way maybe by using AcceleratedKernels.jl. The C++ code uses FFTW library, I know CUDA has CUDAFFTs but I don’t know if AcceleratedKe…

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## [PETSC.jl MPI wrapper](https://discourse.julialang.org/t/petsc-jl-mpi-wrapper/77900)

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**Author:** [@Srikumar](https://discourse.julialang.org/u/Srikumar)\
**Replies:** 8\
**Last updated:** [June 7, 2025, 3:23am UTC](https://discourse.julialang.org/t/petsc-jl-mpi-wrapper/77900 "2025-06-07T03:23:08Z")

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Hello, I would love to know if someone has used PETSC wrapper in Julia for MPI? I am planning to develop a parallel code using the PETSC wrapper and would like to know how extensive the PETSC functionality is in Julia.…

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## [Speeding Up Julia Startup with MPI: Using Scratch Space to Mitigate HDD Access Delay](https://discourse.julialang.org/t/speeding-up-julia-startup-with-mpi-using-scratch-space-to-mitigate-hdd-access-delay/128971)

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**Author:** [@0samuraiE](https://discourse.julialang.org/u/0samuraiE)\
**Replies:** 9\
**Last updated:** [June 5, 2025, 1:36pm UTC](https://discourse.julialang.org/t/speeding-up-julia-startup-with-mpi-using-scratch-space-to-mitigate-hdd-access-delay/128971 "2025-06-05T13:36:11Z")

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Hello everyone, I’m currently experiencing a significant slowdown when launching Julia with MPI on my cluster. I suspect that the issue might be due to the long HDD access times. To mitigate this, I am considering copy…

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## [Seeking introduction to Julia on Rescale HPC platform](https://discourse.julialang.org/t/seeking-introduction-to-julia-on-rescale-hpc-platform/128887)

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**Author:** [@Bananthahally](https://discourse.julialang.org/u/Bananthahally)\
**Replies:** 0\
**Last updated:** [May 10, 2025, 4:09am UTC](https://discourse.julialang.org/t/seeking-introduction-to-julia-on-rescale-hpc-platform/128887 "2025-05-10T04:09:27Z")

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Hello users As part of a project on topological optimization for structural performance, I’m trying to build a Julia application on the Rescale HPC platform, https://rescale.com/ As of May 2025, Rescale hosts Julia v1.…

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## [New Julia HPC Call on second Thursday of the month](https://discourse.julialang.org/t/new-julia-hpc-call-on-second-thursday-of-the-month/114961)

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**Author:** [@giordano](https://discourse.julialang.org/u/giordano)\
**Replies:** 2\
**Last updated:** [May 7, 2025, 9:55pm UTC](https://discourse.julialang.org/t/new-julia-hpc-call-on-second-thursday-of-the-month/114961 "2025-05-07T21:55:05Z")

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As announced in the poll we launched last month, in order to cater for more people across the globe we’re starting an additional time for the Julia HPC call: second Thursday of the month, at 13:00 British Time/14:00 Cent…

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## [Files quota exceeded when trying to install Julia on a cluster with juliaup](https://discourse.julialang.org/t/files-quota-exceeded-when-trying-to-install-julia-on-a-cluster-with-juliaup/128469)

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**Author:** [@e3c6](https://discourse.julialang.org/u/e3c6)\
**Replies:** 2\
**Last updated:** [May 1, 2025, 5:14am UTC](https://discourse.julialang.org/t/files-quota-exceeded-when-trying-to-install-julia-on-a-cluster-with-juliaup/128469 "2025-05-01T05:14:04Z")

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I’m trying to install Julia on a cluster, running this: curl -fsSL https://install.julialang.org | sh -s -- --path $JULIAUP\_DEPOT\_PATH But I get the following error: Now installing Juliaup Error: Failed to extract dow…

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## [JSON3 fails to precompile due to embedded NULs in C strings](https://discourse.julialang.org/t/json3-fails-to-precompile-due-to-embedded-nuls-in-c-strings/128482)

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**Author:** [@0samuraiE](https://discourse.julialang.org/u/0samuraiE)\
**Replies:** 10\
**Last updated:** [April 30, 2025, 1:50pm UTC](https://discourse.julialang.org/t/json3-fails-to-precompile-due-to-embedded-nuls-in-c-strings/128482 "2025-04-30T13:50:33Z")

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Hi all, When trying to precompile JSON3.jl on Julia 1.11.4, the following error occurs: Is there a known fix for this problem? Thank you for your support and guidance. ERROR: LoadError: ArgumentError: embedded NULs a…

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## [\[CfP\] PAW-ATM 2025: Parallel Applications Workshop, Alternatives to MPI+X - Supercomputing 2025](https://discourse.julialang.org/t/cfp-paw-atm-2025-parallel-applications-workshop-alternatives-to-mpi-x-supercomputing-2025/128063)

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**Author:** [@sloede](https://discourse.julialang.org/u/sloede)\
**Replies:** 0\
**Last updated:** [April 14, 2025, 2:27pm UTC](https://discourse.julialang.org/t/cfp-paw-atm-2025-parallel-applications-workshop-alternatives-to-mpi-x-supercomputing-2025/128063 "2025-04-14T14:27:29Z")

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Call for Papers PAW-ATM 2025: Parallel Applications Workshop, Alternatives To MPI+X Held in conjunction with SC25, St. Louis, MO Submissions deadline: July 24, 2025 Notification to authors: August 30, 2025 Worksho…

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## [Efficient optimization of objective with cos and sin terms](https://discourse.julialang.org/t/efficient-optimization-of-objective-with-cos-and-sin-terms/126990)

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**Author:** [@juliohm](https://discourse.julialang.org/u/juliohm)\
**Replies:** 25\
**Last updated:** [March 27, 2025, 1:12am UTC](https://discourse.julialang.org/t/efficient-optimization-of-objective-with-cos-and-sin-terms/126990 "2025-03-27T01:12:03Z")

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Given the following objective: J(t) = ||z\_1 \\cos(t) + z\_2 \\sin(t) - d||\_2^2 with t \\in \[0,2\\pi\] and z\_1,z\_2,d \\in \\mathbb{R}^n. How would you minimize this objective efficiently? I am trying to derive an analytical so…

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## [Removing bounds checking for HPC - \`--check-bounds=unsafe\`?](https://discourse.julialang.org/t/removing-bounds-checking-for-hpc-check-bounds-unsafe/124897)

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**Author:** [@johnomotani](https://discourse.julialang.org/u/johnomotani)\
**Replies:** 51\
**Last updated:** [February 1, 2025, 4:05pm UTC](https://discourse.julialang.org/t/removing-bounds-checking-for-hpc-check-bounds-unsafe/124897 "2025-02-01T16:05:26Z")

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One of Julia’s main purposes is to enable high-performance computing at scale - it’s on the front page (Ecosystem → Parallel Computing at The Julia Programming Language)! However, apparently --check-bounds=no is becoming…

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## [Running A Julia Script Through SLURM](https://discourse.julialang.org/t/running-a-julia-script-through-slurm/123268)

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**Author:** [@leespen1](https://discourse.julialang.org/u/leespen1)\
**Replies:** 4\
**Last updated:** [December 15, 2024, 3:26am UTC](https://discourse.julialang.org/t/running-a-julia-script-through-slurm/123268 "2024-12-15T03:26:46Z")

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I have a julia script that run a physics simulation. The physics simulation takes around 8 hours, and I want to run it with many random initial conditions, so I planned to run the script multiple times using a SLURM job …

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## [Change the default global environment path (Julia on HPC)](https://discourse.julialang.org/t/change-the-default-global-environment-path-julia-on-hpc/122472)

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**Author:** [@tamasgal](https://discourse.julialang.org/u/tamasgal)\
**Replies:** 6\
**Last updated:** [November 11, 2024, 10:38am UTC](https://discourse.julialang.org/t/change-the-default-global-environment-path-julia-on-hpc/122472 "2024-11-11T10:38:40Z")

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A little bit of background: I am currently working on a solution to set up Julia for grid computing where heterogeneous clusters are used (I am aware of GitHub - JuliaParallel/JUHPC: HPC setup for juliaup, julia and HPC…

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## [Package Developement Targeted at Older Julia Versions](https://discourse.julialang.org/t/package-developement-targeted-at-older-julia-versions/122308)

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**Author:** [@NonDairyNeutrino](https://discourse.julialang.org/u/NonDairyNeutrino)\
**Replies:** 6\
**Last updated:** [November 9, 2024, 6:39pm UTC](https://discourse.julialang.org/t/package-developement-targeted-at-older-julia-versions/122308 "2024-11-09T18:39:37Z")

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I’m developing a package (announcement in the coming months!) targeted to run on my university’s supercomputer, but due to funding & priority maintenance limitations, the “operating environment” is out of date; more spec…

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## [Heap-size-hint in MPIClusterManager.jl for out of memory problems](https://discourse.julialang.org/t/heap-size-hint-in-mpiclustermanager-jl-for-out-of-memory-problems/121050)

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**Author:** [@sparrowhawk](https://discourse.julialang.org/u/sparrowhawk)\
**Replies:** 3\
**Last updated:** [October 8, 2024, 2:23pm UTC](https://discourse.julialang.org/t/heap-size-hint-in-mpiclustermanager-jl-for-out-of-memory-problems/121050 "2024-10-08T14:23:15Z")

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Hi, for the MPI transport option, where only MPI can be used for communication on the cluster, I’ve gotten the example from MPIClusterManagers.jl working well for my use case. However, I would like to add a heap size hin…

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## [How can I check the running progress or intermediate output of tasks submitted to the cluster?](https://discourse.julialang.org/t/how-can-i-check-the-running-progress-or-intermediate-output-of-tasks-submitted-to-the-cluster/119737)

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**Author:** [@WuSiren](https://discourse.julialang.org/u/WuSiren)\
**Replies:** 1\
**Last updated:** [September 23, 2024, 11:33am UTC](https://discourse.julialang.org/t/how-can-i-check-the-running-progress-or-intermediate-output-of-tasks-submitted-to-the-cluster/119737 "2024-09-23T11:33:12Z")

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My script contains println or other codes to output some progress information to monitor the running progress of the script. After submitting it through SLURM, the script starts running. However, during the execution of …

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