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Original link: https://colobu.com/2023/09/11/tracing-a-packet-journey-using-linux-tracepoints-perf-ebpf/ Original text: Tracing a packet journey using Linux tracepoints, perf and eBPF I’ve been looking for a low-level Linux network debugging tool for a long time. I’ve been looking for a low-level Linux network debugging tool for a while. Linux allows the use of a combination of virtual interfaces and network namespaces …

Trace a package’s journey using Linux tracepoints, perf, and eBPF Read More »

Original link: https://colobu.com/2023/08/07/deep-copy-in-go/ In the previous article Go Design Patterns in the Real World – Prototype Patterns , we introduced another library jinzhu/copier , author of gorm Zhang Jinzhu, which provides the ability to deeply copy object data. In the communication with netizens, some netizens mentioned that the library of Jinzhu does not support the …

Prototype Pattern Addendum – Deep Copy in Go Read More »

Original link: https://colobu.com/2023/07/27/go-design-patterns-singleton/ In object-oriented programming languages, the Singleton pattern ensures that a class has only one instance and provides global access to that instance. Then in the Go language, the singleton mode confirms that there is only one instance of a type, and provides global access to the modified instance, usually by directly accessing …

Singleton pattern and lazy initialization pattern Read More »

Original link: https://colobu.com/2023/07/24/go-design-patterns-factory/ The factory pattern is a creational pattern, which is a design pattern used to create new objects. The 23 design patterns include the abstract factory pattern, the factory method pattern, and others have also summed up the simple factory pattern. This factory relies heavily on interfaces, abstract classes, and concrete class implementations. …

Real World Go Design Pattern – Factory Pattern Read More »

Original link: https://colobu.com/2023/07/18/cheatsheet-of-100-go-mistakes/ This is a summary for the book “100 Go mistakes and how to avoid them”. It is not easy for the author to sum up 100 easy-to-make mistakes. The closest to this number is Go’s 50 Shades of Gray: Pitfalls and Common Mistakes New Golang Developers Should Pay Attention to . I …

100 Go Programming Mistakes Cheat Sheet Read More »

Original link:https://colobu.com/2023/07/03/mptcp-a-go-1-21-new-feature/ Go 1.21 will be released in two or three months. Many students have summarized the new features of Go 1.21 to create momentum for the arrival of the new Go version. However, I have not seen any students specifically introduce Go 1.21 as a new network library. An added feature, so I will …

MPTCP: an overlooked new feature in Go 1.21 Read More »

Original link: https://colobu.com/2023/06/29/replace-std-map-faster/ In the latest weekly meeting of the Go development team, they discussed Google3 re-evaluating the performance of SwissTable, and it may be worth following up to replace the standard library map. SwissTable [MichaelP]: Google3 may want to do some benchmarking on this. Maps are used heavily in google3. This may be of …

Replace the map of the standard library to implement SwissTable faster Read More »

Original link: https://colobu.com/2023/06/18/a-generic-sortedmap-in-go/ We know that the built-in map type of Go does not maintain the insertion order of the inserted elements, and it is deliberately set to be random when traversing. Therefore, if we want the map to maintain the insertion order of elements, we need to use a third-party library. Today I will …

A generic sorted Go Map implementation Read More »

Original link: https://colobu.com/2023/05/28/go1-21-whats-new-builtin/ In Go 1.21, three built-in functions have been added. Compared with the previous functions such as len , cap , delete , append , close , panic , etc., there are new changes. Let’s take a look. clear clear has always been a function that everyone wants. This new function is used …

do you know? Go adds three new built-in functions Read More »

Original link: https://colobu.com/2023/05/22/how-to-block-the-go-app-exit/ Let me share with you a collection of methods to prevent Go programs from exiting, and there are still some methods that open the mind. Do you have any other methods to prevent the Go program from exiting? Welcome to leave a message in the message area. For a program like the …

How to prevent a Go program from exiting? Read More »

Original link: https://colobu.com/2023/05/21/batch-read-and-write-udp-packets-in-Go-2/ Some time ago, I wrote an article on high-performance batch reading and writing network packets , which introduced the sendmmsg system call, which can send network packets in batches. Some readers asked what is the difference between this and writev . In fact, look at their definitions, you will know where the …

High-performance batch read and write network packets Addendum Read More »

Original link: https://colobu.com/2023/05/13/send-IP-packets-in-Go/ We use net package in the Go standard library, it is easy to send UDP and TCP packets, and develop application layer programs based on them, such as HTTP, RPC and other frameworks and programs, and even we can use the official extension package golang.oef/x/net/iucmp , dedicated to sending and receiving icmp …

Several ways to send IP packets using Go Read More »

Original link: https://colobu.com/2023/05/07/ping-and-record-route/ In the article on using Go to implement the ping tool , we implemented the basic functions of the ping tool ourselves, and we also learned the principle of the underlying implementation of ping. Reader @ZerOne asks a question: Can the function of one-way trace routing be implemented, similar to ping -R …

ping, when you come back, please tell me the address of the router you passed Read More »