Deep dive into Kernel

netperf -H 192.168.2.1 -t TCP_STREAM -- -m 64 ㅇ UDP 를 보낼 때 -N 옵션은 반대편에 netserver 가 없어도 패킷을 전송함netperf -H 10.1.1.2 -t UDP_STREAM -N -- -m 64

Hello World#include #include #include #include #include #include #include #include #include #include #include #include #include #include "main.h" static int lcore_hello(__attribute__((unused)) void *arg) { unsigned lcore_id; lcore_id = rte_lcore_id(); printf("hello from core %u\n", lcore_id); return 0; } int MAIN(int argc, char **argv) { int ret; unsigned lcore_id; ret = rte_eal_init(argc, argv)..

deb http://192.168.2.5/ubuntu saucy main apt-get install reprepromkdir -p /var/www/ubuntu/confvi /var/www/ubuntu/conf/distributions Origin: Choonho SonLabel: OpenStackCodename: saucyArchitectures: amd64 i386Components: mainDescription: Private OpenStack Repository reprepro includedeb saucy /home/sunshout/ubuntu_repo/nova_repo_test2/*.deb

DPDK 개요 PrerequisiteHPET (High Precision Event Timer)Clock Event Device 가 hpet 면,DPDK 빌드시 CONFIG_RTE_LIBEAL_USE_HPET=y 옵션을 사용할 수 있다.root@ubuntu:~# grep hpet /proc/timer_list Clock Event Device: hpet set_next_event: hpet_legacy_next_event set_mode: hpet_legacy_set_mode Huge Page 지원 여부4K 이상의 page를 지원하기 위해서는 CPU에서 지원을 하여야 한다pse (Page Size Extention): 2M huge pagepse36 : 4M Huge pagepdpe1gb : 1G Hug..

page migration : https://www.kernel.org/doc/Documentation/vm/page_migration 커널이 free_page를 요청할 때는 __get_free_pages(gfp_mask, order) 함수를 호출하며, 2^order 의 continuous pages 가 할당된다.

beagle board에 OS를 설치하기 위해서는 cross compile 환경이 필요하다. 그래서 ubuntu 13.10 i386 기반으로 개발환경을 구축하였다. cross compile tool 들이 32bit 환경이니 i386 버전을 설치하면 편리하다. 참조 http://eewiki.net/display/linuxonarm/BeagleBoard Beagle QEMU emulatorhttp://beagleboard.lohray.com/vm-larix/setting-up-an-emulator/qemu-emulationhttps://sumanprasanna.wordpress.com/2012/12/11/bb_nandflash-sh/QEMU for beagleboard : https://sumanprasan..

1. Source download $ git clone git://git.qemu.org/qemu.git 2. Build tool install $ sudo apt-get install pkg-config zlib1g-dev libglib2.0-dev libsdl1.2-dev or$ apt-get build-dep qemu 3. Compile$ cd ${qemu dir} $ ./configure --enable-debug --target-list="x86_64-softmmu" --enable-kvm $ sudo make $ sudo make install

Python APIs : The best-kept secret of OpenStack http://www.ibm.com/developerworks/cloud/library/cl-openstack-pythonapis/index.html?ca=drs- import os def get_nova_creds(): d = {} d['username'] = 'admin' d['api_key'] = 'admin_pass' d['auth_url'] = 'http://192.168.1.98:5000/v2.0' d['project_id'] = 'admin' return d from novaclient import client as novaclientcreds = get_nova_creds()nova = novaclient...

ㅇ 리눅스 Virtual Memory에 대해서 아주 상세하고 설명한 자료 ㅇ Memory Management in Linux (2.4)

KVM에서 EPT 는 Guest OS가 gfn을 access할 때, VM Exit가 발생하며, 이에 매칭되는 pfn을 생성한다. I have tried to log EPT construction status at VM startup, that is to add some codes in function __direct_map (arch/x86/kvm/mmu.c). __direct_map constructs the EPT paging structure when a guest page firstly touched, and I can get related gfn and pfn here.