A scheduler chooses the next task to be run, and maintains the order, which all the processes on the system should be run in, as well. In the same way as most operating systems out there, Linux implements preemptive multitasking. Meaning, the scheduler decides when one process ceases running and the other begins.
These task schedulers act like a smart alarm clock. When the alarm goes off, the operating system will run the predefined task. In the case of Linux, it comes with two basic but powerful tools: Cron daemon (default task scheduler) and at (more suitable for one-time task scheduling).
Yet another inquiry we ran across in our research was “How does SMP schedule work in Linux kernel?”.
(ARM architecture) Bookmark this question. Show activity on this post. In linux, the scheduler will be triggered when a specific amount of time has passed. As I understood, the timer triggers an interrupt which in turn triggers a call to schedule.
So, what triggers the scheduler in a SMP?
An answer is that in linux, the scheduler will be triggered when a specific amount of time has passed. As I understood, the timer triggers an interrupt which in turn triggers a call to schedule. In a SMP system, I read in the book “Understanding the Linux Kernel” that “each processor runs the scheduler () function on its own”.
Why doesn’t Linux kernel use the PPI timer for scheduling?
The current Linux kernel doesn’t use this specific PPI timer for scheduling. It is only used as a delay loop time source. Instead the Global PPI timer is used. This timer can interrupt each CPU selectively, but the register set is global to all CPUs. A particular CPU may schedule an interrupt for itself; with the time base being global.
Which operating system is usually built on top of Linux kernel?
Linux distributions are Unix-like operating systems usually built on top of Linux kernel. ____ is sponsored by Red Hat. (Pick the right option).
Another frequent question is “Which one is the lowest level of the operating system?”.
The kernel is the core of the system and manages the CPU, memory, and peripheral devices. The kernel is the “lowest” level of the OS. Q) Which one provide command interpreter environment? Shell provides a command interpreter environment to the Linux kernel for giving instructions.
What are the Linux MCQs?
Most of the Linux MCQs are asked in the interviews and they have answers and explanations. The kernel is the core of the system and manages the CPU, memory, and peripheral devices. The kernel is the “lowest” level of the OS.
Are there any multiple choice questions in Linux interview?
Linux multiple choice questions for interview and Linux exams preparation. Most of the Linux MCQs are asked in the interviews and they have answers and explanations. The kernel is the core of the system and manages the CPU, memory, and peripheral devices.