Muhammad's Substack
Muhammad Zubair Bin AkbarMy personal Substack
| Platform |  | Pricing | Only free issues | Publishes | Twice weekly |
|---|---|---|---|---|---|
| Issues | 7 | Founded | a month ago | Last Issue | 5 days ago |
| Active | |||||
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hpcpulse.substack.comLatest Issues
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...
What Actually Happens After You Run sbatch?
If you are learning Slurm, you probably start with a few commands:
sbatch job.sh
squeue
scancel <jobid>
It is easy to think of sbatch as simply “running a job.”
But that is not really what happens.
When you run:...
Why Can't We Just Use a Powerful Server Instead of an HPC Cluster?
If one powerful server can have dozens of CPU cores, hundreds of gigabytes of RAM, and even multiple GPUs, why do we need an entire HPC cluster?
It’s a very reasonable question when you first start learning about High Performance Computing...
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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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