Read the docs: "A value of zero causes the thread to relinquish the remainder of its time slice to any other thread that is ready to run. If there are no other threads ready to run, the function returns immediately, and the thread continues execution. A quote from " Windows Internals 5Ed ": Windows must determine which thread should run next. Lior Kogan Lior Kogan I think you are misreading that.
At the very least, a full pre-emptive context switch requires saving the entire "user" processor state which includes all the user registers.
The part you highlighted only has to do with the stack register and changing stacks but you still need to preserve registers. Sign up or log in Sign up using Google.
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The kernel dispatcher performs thread scheduling and context switching. The dispatcher can call thread switches for various reasons:. From the Windows Internals Book, 5th Edition :. A thread includes the contents of a set of volatile registers representing the state of the processor; two stacks, one for the thread to use while executing in kernel mode and one for executing in user mode; a private storage area for use by subsystems, run-time libraries, and DLLs; and a unique identifier called a thread ID also internally called a client iD.
If you want to deep dive down into this further there is a chapter available for download as a PDF Chapter 5: Processes, Threads and Jobs. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?
Learn more. What causes Context Switching on Windows? Ask Question. Asked 11 years, 11 months ago. Active 8 years, 10 months ago. Viewed 7k times. Improve this question. Q Boiler Q Boiler. Add a comment. Active Oldest Votes. Improve this answer. The same goes for designers, marketers, project managers, and even executives. While there are lots of ways you can increase your overall time for Focus Work, the easiest is to change your schedule.
In practice, there are plenty of practical scheduling strategies you can use to find more focus. Here are a couple of our favorites:. Each block is assigned a specific task so that instead of trying to cram work into the slivers of time between meetings and emails, you know exactly what needs to be done and when.
Timeblocking is great if you have a singular focus most days. But what if you wear a lot of different hats? Building context can take hours, only to be lost by a random interruption. To solve the issue, Harrison split his weekly work schedule between days focused on pairing and syncs and those where he wanted to do Deep Focus Work. Whichever you choose, the goal is to offload your decision-making so you can spend more time focused on your most important work. Your schedule can act as a map for what a focused, non-switch-filled day looks like.
However, when you single-task i. And while the modern workplace has made it harder and harder to actually focus on one thing at a time, you can rebuild your focus muscle with a few habits:. If it helps, think of these focus sessions like you would training at the gym. You need to know your limits, focus on consistency over exertion, and take breaks in between sessions. Yet, results indicate it is difficult for people to transition their attention away from an unfinished task and their subsequent task performance suffers.
Luckily, there are a few ways to get rid of or at least reduce the attention residue that causes you to context switch. First, batch similar tasks together. So, if you have a full inbox to clear out or a stack of reports to write, batch those tasks together. This could mean grabbing a cup of coffee, closing your laptop, or walking around your home office.
As Francesca Gino and Michael I. Norton, behavioral scientists at Harvard Business School, write :.
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