Tag：interrupt
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Time：2021-6-7
The realization principle of timer The implementation of timer depends on CPU clock interrupt, and the precision of clock interrupt determines the limit of timer precision. How can a clock interrupt source implement multiple timers? For the kernel, simply speaking, it is to use a specific data structure to manage many timers, determine which timers […]
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Time：2021-6-3
@ catalogue Concurrency and contention in kernel Atomic operation Introduction to atomic operation Integer atomic operation function Bit atom operation function Atomic operation routine Spin lock Introduction of spin lock Spin lock operation function Spin lock routines Read write spin lock Read write lock routine Sequence lock Sequential lock operation function Precautions for using spin […]
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Time：2021-5-11
In Java, the runnable interface represents a task that does not return a result, while the callable interface represents a task that returns a result.In concurrent programming, executing tasks asynchronously and obtaining task results can improve the throughput of the system. Future interface emerges as the times require. It represents the execution results of asynchronous […]
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Time：2021-5-6
Time, no matter in any life situation, is a very important concept. Just imagine, if there is no time, almost everything in this world will be in disorder, but at the same time, many scientists will also ask, in the objective world, does time really exist（ It’s a bit far away Back to the point, […]
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Time：2021-5-2
Technical editor: mango fruitSegmentFault has he reported the official account number: SegmentFault According to foreign media reports, yesterday afternoon Pacific time, IBM cloud broke down, causing many websites to lose response. The IBM page is also inaccessible IBM’s own status page is also hosted in An internal server error occurred on IBM cloud. According […]
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Time：2021-4-30
This paper mainly discusses how to let a thread monopolize the CPU in the fields of high real-time requirement, high-efficiency computing and dpdk; The principle of thread and interrupt isolation involved in exclusive CPU; And how to make the timer tick of the system not interrupt the exclusive task in the exclusive exclusive case, so […]
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Time：2021-4-14
break: interrupts execution and outputs results continue: skip this time and continue to execute the remaining code return: exits the loop, interrupts execution, and returns function parameters
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Time：2021-3-31
1. Interrupt thread When the interrupt method is called on a thread, the interrupt state of the thread is set. This is the Boolean state that every thread has. Each thread should check this flag from time to time to determine whether the thread is interrupted.To find out if the interrupt state is set, first […]
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Time：2021-3-12
Technical editor: Xu Jiuli from the editorial department GitHub experienced a second service outage in two weeks, this time lasting about four hours. According to @ shijin1, a microblog blogger, Microsoft responded to the GitHub service interruption by sending an email, saying that after investigation, it found that the reason for the service interruption was […]
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Time：2021-2-9
ADK AMBA Design Suite AHB advanced high performance bus AHB ‐ AP AHB access port AMBA advanced MCU bus architecture APB advanced peripheral bus Arm arm architecture reference manualASIC industry specific integrated circuitATB advanced tracking busBe8 byte invariant big end modeCPI cycles per instructionCPU central processing unitDAP debug access portDSP digital signal processor / digital […]
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Time：2021-2-5
Usage Summary of Python yield and yield from Yield effect: 1 Note:The next () method of generator is next () in Python 2, but not in Python 3__next__()[there are two underscores before and after next] Turn a function into a generator, and the function with yield is no longer an ordinary function. That is: a […]
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Time：2021-1-29
Stopping a thread means stopping the operation before the task is finished, that is, abandoning the current operation. To stop a thread, you can use the Thread.stop () method, but it’s better not to use it. Although it can stop a running thread, this method is not safe and has been abandoned. In Java, there […]
