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1, Document management 1. ls command – displays the content and attribute information under the specified working directory Options and parameters: -a: All files are listed together with hidden files (files starting with). Commonly used)-d: List only the directory itself, not the file data in the directory (common)-l: Long data s ...

 cfs_rq Each cpu has a corresponding running queue rq, in which the scheduling queues with different scheduling strategies are maintained. struct rq { ... struct cfs_rq cfs; struct rt_rq rt; struct dl_rq dl; ... }; The scheduling queue of cfs is maintained through the red black tree_ In the ...

preface    due to the speed limit of bram form, under the same urgent time conditions, we still changed back to the way of axidma to reduce the dimension and attack. For the speed of a few megabytes, there is a feeling of killing chickens with an ox knife. There is no way. The original knife is just a little worse. The ox knife is ea ...

S h e l l Shell Shell Scripting Language Tutorial 2 2 2 Copyright: Jingmin Wei, Pattern ...

Broken thoughts As the first group of people who came into contact with the Internet in China, there are countless pictures of ancient times on my hard disk, and many of them are downloaded from forums that are not very popular. As we all know, this uses phpwind v7 5. For the widely used Chinese Forum, its user id actually corresponds to a str ...

Experiment 5: memory paging Corresponding book P199 page 5.2 1. Summary of relevant basic knowledge Page directory page directory item page table page table item physical page virtual address physical address Concept Brief Page directory entries and page table entries The lower 3 bytes are attributes. The upper 20 bits are physical address ...

Use a custom security manager as a low overhead alternative to native tracers. Native tracing tools are always the first choice for tracking file system access to Java applications. On Windows, use Process Monitor to track I / O. On Linux, use strace. Other platforms also provide similar functions. By tracing directly in Java, you can address ...

Banker algorithm: java implementation (based on textbook) attribute Needs to be passed in the constructor Integer Resources, used for the table name and the number of available Resources. There are several Resources in totalInteger Process, used for the number of table name processes. There are several processes in totalInteger array Availab ...

Signal generation Concept of signal Signaling is a way of asynchronous notification of events between processes, which belongs to soft interrupt Generation method: Generate a signal to the process through the terminal keyboard. If the process can terminate the program by pressing "ctrl + c" when running, it is actually sending ...

This article was originally released by RT thread user @ chengjili and is used to participate in the n32g457 RT thread design competition jointly launched by RT thread and national technology. The original text: https://club.rt-thread.org/as...This design is used to participate in the innovation "core" engine - national technology n32 ...