Muhammad's Substack
Muhammad Zubair Bin AkbarMy personal Substack
| Platform |  | Pricing | Only free issues | Publishes | Twice weekly |
|---|---|---|---|---|---|
| Issues | 9 | Founded | 2 months ago | Last Issue | 11 days ago |
| Active | |||||
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hpcpulse.substack.comLatest Issues
CPU, Cores and Threads in HPC: Understanding What Your Job Actually Uses
When you submit a job to an HPC cluster, you might request 4 CPUs, 8 CPUs, or perhaps an entire compute node.
But what does that actually mean?
Does one CPU mean one physical processor? Does one core mean one CPU? And where do threads fit...
5 Slurm Configuration Parameters That Shape Your HPC Cluster
When building an HPC cluster, we often focus on compute nodes, CPUs, RAM, GPUs, networking and storage.
But there is another important part of the design: how Slurm manages those resources.
A cluster might have hundreds of CPU cores and s...
Why Memory Bandwidth Matters in HPC
Imagine having a powerful CPU with dozens of cores, but those cores spend time waiting for data from memory.
The processor is ready to work, but the data isn’t arriving quickly enough.
This is one reason why adding more CPU cores doesn’t...
Why More CPU Cores Don’t Always Make an HPC Application Faster
If 1 CPU can run a program, then 8 CPUs should make it much faster.
Right?
Not necessarily.
This is one of the first things that can be surprising when learning HPC.
We can keep adding CPU cores to a system, but that does not mean an ap...
Why Does HPC Need InfiniBand?
When people first learn about HPC clusters, they often notice something unusual.
The compute nodes don’t just have Ethernet.
Many HPC clusters also have InfiniBand.
So a natural question is:
Why?
If Ethernet already connects computers...
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The writers behind this newsletter.
Linux & HPC Engineer writing about HPC, AI infrastructure, GPUs, cloud, Linux, Slurm, and modern compute. Practical insights, technical deep dives, and real world lessons for engineers and curious learners.
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