Deep dive into Kernel

vpp -c /etc/vpp/startup.conf ipfix classify table add ip4 0를 하면 인터페이스가 다운되고 죽음 set ipfix classify stream domain 0set ipfix exporter collector 192.168.1.254 port 8888 src 192.168.1.1 fib-id 0set ioam export ipfix collector 192.168.1.254 src 192.168.1.1 test classifyshow classify tables vpp# show classify tables TableIdx Sessions NextTbl NextNode 0 10 -1 0 Heap: 10 objects, 16k of 18k used, 364 fr..

vpp# ipfix classify table add ip4 0 vpp# set ipfix classify stream domain 0 vpp# set ipfix exporter collector 192.168.1.254 port 8888 src 192.168.1.1 fib-id 0Collector 192.168.1.254, src address 192.168.1.1, fib index 0, path MTU 512, template resend interval 20s, udp checksum disabled

vpp# set int ip address GigabitEthernet3/0/1 172.20.120.3/24vpp# set int state GigabitEthernet3/0/1 upset interface mtu 1500 TenGigabitEthernet0/5/0 show hardwarevpp# show hardware Name Idx Link HardwareTenGigabitEthernet0/5/0 1 up TenGigabitEthernet0/5/0 Ethernet address 52:54:00:c7:f8:96 Intel 82599 VF carrier up full duplex speed 10000 mtu 9216 rx queues 1, rx desc 1024, tx queues 1, tx desc ..

./perf -q 32 -s 4096 -w randwrite -M 0 -t 30 -c 0x1 Initializing NVMe ControllersAssociating INTEL SSDPEDMD400G4 (CVFT5161008G400BGN ) with lcore 0Initialization complete. Launching workers.Starting thread on core 0INTEL SSDPEDMD400G4 (CVFT5161008G400BGN ) from core 0: 266609.31 IO/s 1041.44 MB/s========================================================Total : 266609.31 IO/s 1041.44 MB/s

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 #..

@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} }

Packet drop is recorded in only Port level. (GLPRT_RDPC)GLV_RDPC is drop from no usable descriptor ring buffer.

Install git clone https://github.com/Pktgen/Pktgen-DPDK.gitcd Pktgen-DPDK/dpdkexport RTE_SDK=/root/Pktgen-DPDK/dpdkexport RTE_TARGET=x86_64-pktgen-linuxapp-gccmake install T=x86_64-pktgen-linuxapp-gcc apt-get install libpcap-dev cd examples/pktgenmake Execution./app/build/pktgen -c 7 -n 4 -- -p 3 -m "1.0, 2.1" -T black Destination MAC change Format: set mac Pktgen> set mac 0 42:34:9e:c4:48:23 Ch..