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【Fundamental Tech】/Linux

NUMA NUMA
2025. 1. 29. 참고https://blog.naver.com/bomyzzang/220906611725https://lunatine.net/2016/07/14/numa-with-linux/NUMA관련 잘 정리된 글이 있어 Backup합니다.NUMA1. System Topology1-1. CMP최근 CPU는 하나의 소켓에 여러개의 코어를 가지고 있다. 이를 보통 멀티코어라고 지칭하며 하나의 칩에 여러개의 프로세서가 올라가기 때문에 CMP(Chip-level Multi Processor)라고도 부른다. 이러한 멀티코어 CPU에 대한 메모리 관계는 아래와 같이 표현 할 수 있다.1-2. SMP하지만, 멀티코어 CPU를 2개 이상 장착한 시스템의 경우에는 메모리를 2개 이상의 CPU가 접근하기 때문에 CPU와 메모리 사이를 네트..
VSCode를 이용한 Linux Kernel 분석 VSCode를 이용한 Linux Kernel 분석
2025. 1. 29. 참고: https://joolib.tistory.com/18VSCode를 이용한 Linux Kernel 분석 방법에 대해 정리합니다.Extention Backup: https://github.com/cyber93/linux-kernel-vscodeLinux OS가 설치된 PC상에 VSCode를 설치하고 아래 소개된 Extention을 이용합니다.VSCode를 이용한 Linux Kernel 분석1. C/C++Linux Kernel은 수많은 파일들로 구성되어 있습니다.파일 내에 호출되는 함수의 정의로 이동하기 위해 C/C++ Extension을 설치합니다.이것을 설치하면 아래 그림과 같이 정의로 이동 기능이 활성화됩니다.2. C++ Intellisense & GNU Global많은 아키텍처와 파일들로 구성되..
깨진 심볼릭 링크 검색/삭제 깨진 심볼릭 링크 검색/삭제
2023. 5. 7. 깨진 심볼릭 링크 파일 검색 명령 옵션 $ find -L $DIR -maxdepth 1 -type l 깨진 심볼릭 링크 파일 삭제 옵션 $ find -L $DIR -maxdepth 1 -type l -delete
Linux Storage Stack Diagram Linux Storage Stack Diagram
2022. 11. 20. Linux Kernel Versions An overview of the most important changes to the respective versions of the core Linux Kernel Versions - Thomas-Krenn-Wiki The Linux core is in a constant state of development and expansion. This article will provide an overview of the most important changes to the respective versions of the core. Linux Kernel 5.x Kernel 5.4 Kernel 5.3 Kernel 5.2 Kernel 5.1 Kernel 5.0 Linux..
The block I/O layer, part 4 - The multi-queue interface The block I/O layer, part 4 - The multi-queue interface
2022. 11. 19. ◈ 출처: http://ari-ava.blogspot.com/2014/07/opw-linux-block-io-layer-part-4-multi.html So, a couple of weeks ago I performed some first tests on the prototype driver using a simulated device created with the null_blk device driver. Such tests, and the following profiling, highlighted some locking issues due to contention on an internal lock kept by the frontend driver; more in detail, such a lock ..
The block I/O layer, part 3 - The make request interface The block I/O layer, part 3 - The make request interface
2022. 11. 19. ◈ 출처: http://ari-ava.blogspot.com/2014/07/opw-linux-block-io-layer-part-3-make.html During the past weeks, I have been learning about profiling an operating system running in a virtual machine, since I have been needing to examine the driver I am working on to locate bottlenecks and work out lock contention issues. My OPW mentor has suggested that I get to grips with some popular profiling tools..
The block I/O layer, part 2 - The request interface The block I/O layer, part 2 - The request interface
2022. 11. 19. ◈ 출처: http://ari-ava.blogspot.com/2014/06/opw-linux-block-io-layer-part-2-request.html Following the many directives and suggestions given by my OPW mentor, I have been implementing the tiniest and simplest block I/O driver, whose multi-queue implementation just fills I/O request structures with available information about the CPU core the process has been issuing I/O from; this is proving very ..
The block I/O layer, part 1 - Base concepts The block I/O layer, part 1 - Base concepts
2022. 11. 19. ◈ 출처: http://ari-ava.blogspot.com/2014/06/opw-linux-block-io-layer-part-1-base.html So, during the last few weeks I have been studying and tracing the block I/O layer of the Linux kernel, with the aim of getting a clearer view of how it works. A fellow student from the University of Modena and Reggio Emilia thought I might write a blog post on that. My very patient OPW mentor approved the topic ..

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