October 2017
Intermediate to advanced
586 pages
14h 8m
English
Content preview from Linux Device Drivers Development
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ksoftirqd
In most cases, softirqs are scheduled in hardware interrupts, which may arrive very quickly, faster than they can be serviced. They are then queued by the kernel in order to be processed later. Ksoftirqds are responsible for late execution (process context this time). A ksoftirqd is a per-CPU kernel thread raised to handle unserved software interrupts:
In the preceding top sample from my personal computer, you can see ksoftirqd/n entries, where n is the CPU number that the ksoftirqds runs on. CPU-consuming ksoftirqd may indicate an overloaded system or a system under interrupts storm, which is never good. You can have a look at ...
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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.