How Linux Kernel 2.6, Scheduler gets scheduled & how it schedules process?

[raj_linux]

Hi,

I read the earlier post -- "RTOS vs. Linux kernel workqueue - what are advantages ? ". It is an awsome explaination. It is of great help for any Linux beginner.
I've one a few very basic questions -- How Linux Scheduler gets scheduled? Who schedules it? If let's assume, on my x86 PC, a key is pressed on gedit process. Starting from Hardware interrupt, how actually, the key is shown on the gedit screen??
It involves, Hardware interrupt, processor, ISR, context switching, device driver etc... I would be really thankful if anybody can explain me the complete flow. I didn't come across any blog, thread anywhere which discusses about this.


with regards
Raj

 

[navenmou]

Hi..
Basically scheduler gets scheduled by kernel itself......Please once check below links..I hope it will help you
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[raj_linux]

Hi Naveen,

First of all, a big thanks for your prompt response.
I'm reading the stuff mentioned by you. Thanks once again.

It would be great if I can get the complete flow for the usecase I mentioned:
Let's assume, on my x86 PC, a key is pressed on gedit process. Starting from Hardware interrupt, how actually, the key is shown on the gedit screen??
It involves, Hardware interrupt, processor, ISR, context switching, device driver etc...

(In the usecase, the minute details like finding out the priority, timeslice computation or things like that can be safely ignored for simplicity purpose.)