Tag：process
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Time：2021-7-30
1 original intention Suppose there is the following code, the parameter C of the render method changes frequently, while a and B change infrequently. By analyzing this code, we can draw a conclusion: each time the render function is called, it will trigger the call of the calc function. If the A and B parameters […]
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Time：2021-7-30
In the last issue, we introduced how to set the pseudo protocol and pull up the client through the pseudo protocol link. In fact, there are many scenarios for the pseudo protocol, such as Baidu online disk or Xunlei. Click the link on the web page to download, or click the link to pull up […]
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Time：2021-7-30
The article is continuously updated every week. Your “three links” are the greatest affirmation to me. WeChat can search the public for the first time to read the official account of “backend Technology School” (usually one to two updates earlier than blogs). Operating system “process” is a basic concept that you should contact when learning […]
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Time：2021-7-29
Asynctask is a producer consumer model provided by swoole, which can easily deliver a slow task to the queue and be executed asynchronously by the process pool. At present, the task function can only be used in swoole_ Used in server. Version 1.9.0 provides redisserver framework, which can implement a server program based on redisserver […]
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Time：2021-7-28
The idea is simple: Start a child process to process asynchronous transactions. After processing, tell the parent process through the pipeline and write the returned data to the pipeline The code is as follows: AsynHttpClient.php <?php class AsynHttpClient { public $url; public $callback; private $process; public function __construct($url, $callback) { $this->url = $url; $this->callback = […]
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Time：2021-7-28
Series catalog Preface preparation BIOS boot to real mode GDT and protection mode On virtual memory Load and enter the kernel Display and print Global descriptor table GDT Interrupt processing Virtual memory perfection Implement heap and malloc First kernel thread Multithreading operation and switching Lock and multithreading synchronization Enter user status Process implementation system call […]
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Time：2021-7-28
preface Welcome to the operating system series, which is still explained in the form of illustration + vernacular, so that Xiaobai can understand it and help you get started quickly This chapter begins with the introduction of processes, threads and collaborative processes. I believe many white people do not understand these concepts clearly. Here are […]
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Time：2021-7-28
How do we kill a resource / process in Linux? Obviously, we’ll find the PID of the resource and use the kill command. To be more clear, we can find the PID of a resource (such as terminal): Copy code The code is as follows: $ ps -A | grep -i terminal 6228 ? […]
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Time：2021-7-27
Summary:Easy to learn and master java tools in the form of one question and one answer. Learn java tools in the form of one question and one answer Q: What are the tools for checking memory leaks?A: Jmap generates dump files, which can be viewed visually by jhat. Q: The CPU utilization of a process […]
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Time：2021-7-27
This article is transferred from @twt community, [author] Boya. During this period, an application test server has a high CPU and cannot log in normally. The details are as follows: At 6:00 p.m. on February 28, the developer suddenly sent me a screenshot saying that 187 server could not log in and asked me if […]
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Time：2021-7-27
Thesis Name: the evolution of the UNIX time sharing system — Danis M. Ritchie Dennis rich reviewed the process of creating UNIX with Ken Thompson at Bell Labs, and then introduced the most important parts of UNIX, including: file system I-list: an array of i-nodes. Each i-node describes a file. I-node contains the metadata of […]
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Time：2021-7-27
Common related commands Container lifecycle management Docker run: create a new container and run a command Docker start: start one or more containers that have been stopped Docker stop: stops a running container Docker restart: restart the container Docker kill: kill a running container. Docker RM: Deletes one or more containers. Docker pause: pauses all […]
