January 2004
Intermediate to advanced
432 pages
11h 1m
English
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Run Queues
We have used the term run queue frequently in this chapter. Let's take a moment to understand what a run queue is, where it is located, and how it is implemented.
The run queue does not exist as a single structure. It is built by linking together all runnable threads on the system to appropriate queue headers. Which queue header a runnable kthread is linked to depends on its processor affinity, its priority, kt_pri and its scheduling policy stored in kt_schedpolicy (stored in the thread's kthread structure). To enter a processor's run queue, we start with the mp_threadhd structures.
The structures are stored in a number of arrays (dependent on the number of processors and processor sets). Each of the per-processor run queues has 160 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.