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VPN and Tunnel Network Overheads – MTU – Tunnel Headers – VPN Packet Encapsulations #vpn #networking #sdwan
When you architect and implement a VPN deployment as a part of standalone setup or leveraging VPN technologies as one of your building blocks of your SD-WAN product architecture, one…
Roadmap – How to become Linux Kernel Developer – Device Drivers Programmer and a Systems Software Expert #classes #courses
Many viewers and even sometimes my students ask me how I can become a kernel programmer or just device driver developer and so on. So here is my YouTube video…
Linux Kernel Programming – atomic_t datatype – atomic variables and APIs #programming #kernel #linux
If you allocate any global variables and when you access them (i.e read or write) at different parts of the code you are supposed to use locks such as Spinlocks,…
GOTO Statements in Linux Kernel Source #kernel #linux #programming #kernelprogramming #goto
If you are a student you may come across a term called structured programming. Which actually means you write a smooth flow of code and whenever required you steer the…
Q&A – Recursive APIs – why I never use them? #kernelprogramming #linux #systems-programming
When you learn programming usually you learn about various programming constructs. One of them is about calling APIs (functions) recursively. Recursive function calling is quite common in situations such as…
Why Linux Kernel is written in C-language but not in C++ ? #TheLinuxChannel #kernelprogramming
Although the current Linux Kernel source-code contain certain parts of the code written in assembly code (actually native CPU assembly instructions) and recently certain parts of code written in Rust…
Systems Programming – Kernel Crash vs User-space Process Crash
A crash in User-space process (say something like segmentation fault) happens just in process virtual memory address space vs a crash in Kernel space (such as Linux Kernel which is…
Linux Kernel Tasklets – Big-Picture vs User-Space Threads (pthreads)
Linux Kernel Tasklets and Work queues are somewhat similar to user-space process threads in terms of the functionality and of course not in terms of its operation or its internal…
Kernel customization via make menuconfig – Linux Kernel Compilation (or a Kernel Build)
Here is a detailed YouTube video on Linux Kernel custom compilation and customization via make menuconfig interface
Smart NIC Cards
NIC Cards (Network Interface Cards) traditionally contain controller chip which takes care of the core aspects, such as packet reception, buffering (till they are read by OS device drivers), etc.…