Deep dive into Kernel

ReferenceAnatomy of a Program in Memoryhttp://duartes.org/gustavo/blog/post/anatomy-of-a-program-in-memory/ Linux x86 Program Start Uphttp://dbp-consulting.com/tutorials/debugging/linuxProgramStartup.html [glibc] CSU (C start up) routineshttp://egloos.zum.com/studyfoss/v/5283161

In a program or code, it is necessary to identify kernel version.For example, vlan_tx_tag_get is changed to skb_vlan_tag_get in kernel 4.0.0.We can do by using LINUX_VERSION_CODE and KERNEL_VERSION(a,b,c). In these case, we need to switch to new API. #include #if ( LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0) ) /* vlan_tx_xx functions got renamed to skb_vlan */ #define vlan_tx_tag_get skb_vlan_ta..

DPDK 에서 rte_malloc 은 기존 malloc 대비 상당히 성능 저하가 존재한다. 실험:1024 Bytes 크기의 memory 를 10,000,000 번 malloc 과 free 를 반복 수행하여 평균값을 구하였다. DPDK 성능 저하 원인:ㅇ rte_malloc 은 malloc 시 lock spin_lock을 잡고 진행되는데 thread의 개수가 증가하면 lock contention 이 발생하고 성능 저하가 linear 하게 증가하게 되는거 같다. 실험환경Ubuntu 14.04, x86_64CPU: Intel(R) Atom(TM) CPU C2758 @ 2.40GHzMemory: 32GB 소스코드 #include #include #include #include #include #include #..

http://forum.xda-developers.com/galaxy-s3/general/ubuntu-backtrack-i9300-samsung-galaxy-s3-t1700228

Making B+-Trees Cache Conscious in Main Memory: https://www.cs.duke.edu/courses/spring03/cps216/papers/rao-ross-2000.pdf Cache-Conscious Data Structureshttp://research.microsoft.com/en-us/um/people/trishulc/papers/cache-conscious.pdf [ACM SIGPLAN 1999] Cache-Conscious Structure Layerhttp://research.microsoft.com/en-us/um/people/trishulc/papers/layout_distr.pdf Cache-Oblivious Dynamic Search Tree..

N/W 분석 필요성- The characterization of network protocols is required not only for creating accurate network traffic reports, but increasingly, for overall network security needs. DPI의 필요성, L4 분석으로는 모자람- Today, traffic inspection facilities are available on every modern network security device, because the binding port/protocol scheme no longer holds 통계적 방법의 한계가 있음- This difficulty triggered the dev..

# Kickstart file automatically generated by anaconda. #version=DEVELinstallurl --url=http://ftp.daum.net/centos/7/os/x86_64/lang en_US.UTF-8keyboard usnetwork --onboot yes --device enp0s20f0 --bootproto dhcp --noipv6network --onboot yes --device enp4s0f1 --bootproto dhcp --noipv6rootpw --iscrypted $6$ky2rmsUpWeGJtHrl$fFhWPBijM0Ue3Mk2naotBqymrzMYqH8FXyhH6UbXko3kWP9Vkq1lcEdiCWvUISbRsS3WqT1MD3dokWY..

@inproceedings{deri2014ndpi, title={nDPI: Open-source high-speed deep packet inspection}, author={Deri, Luca and Martinelli, Maurizio and Bujlow, Tomasz and Cardigliano, Alfredo}, booktitle={Wireless Communications and Mobile Computing Conference (IWCMC), 2014 International}, pages={617--622}, year={2014}, organization={IEEE} }

http://www.supermicro.com.tw/products/nfo/Xeon_MP.cfm