DPDK KNI interface
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KNI (Kernel Network Interface) is one of the approach, used in DPDK, to connect its user space libs with the Linux kernel network stack.
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eBPF Basics
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Direct Code Execution - LinuxCon Japan 2014
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Building Network Functions with eBPF & BCC
Building Network Functions with eBPF & BCCKernel TLV eBPF (Extended Berkeley Packet Filter) is an in-kernel virtual machine that allows running user-supplied sandboxed programs inside of the kernel. It is especially well-suited to network programs and it's possible to write programs that filter traffic, classify traffic and perform high-performance custom packet processing.
BCC (BPF Compiler Collection) is a toolkit for creating efficient kernel tracing and manipulation programs. It makes use of eBPF.
BCC provides an end-to-end workflow for developing eBPF programs and supplies Python bindings, making eBPF programs much easier to write.
Together, eBPF and BCC allow you to develop and deploy network functions safely and easily, focusing on your application logic (instead of kernel datapath integration).
In this session, we will introduce eBPF and BCC, explain how to implement a network function using BCC, discuss some real-life use-cases and show a live demonstration of the technology.
About the speaker
Shmulik Ladkani, Chief Technology Officer at Meta Networks,
Long time network veteran and kernel geek.
Shmulik started his career at Jungo (acquired by NDS/Cisco) implementing residential gateway software, focusing on embedded Linux, Linux kernel, networking and hardware/software integration.
Some billions of forwarded packets later, Shmulik left his position as Jungo's lead architect and joined Ravello Systems (acquired by Oracle) as tech lead, developing a virtual data center as a cloud-based service, focusing around virtualization systems, network virtualization and SDN.
Recently he co-founded Meta Networks where he's been busy architecting secure, multi-tenant, large-scale network infrastructure as a cloud-based service.
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- The evolution of the BPF filters and explained the advantages of eBPF Filters and its use cases today in Linux especially on how Cilium networking utilizes the eBPF Filters to secure the Kubernetes workload with increased performance when compared to legacy iptables.
- How Cilium uses SOCKMAP for layer 7 policy enforcement - How Cilium integrates with Istio and handles L7 Network Policies with Envoy Proxies.
- The new features since the last release such as running Kubernetes cluster without kube-proxy, providing clusterwide NetworkPolicies, providing fully distributed networking and security observability platform for cloud native workloads etc.
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SF-TAP: Scalable and Flexible Traffic Analysis Platform (USENIX LISA 2015)Yuuki Takano SF-TAP: Scalable and Flexible Traffic Analysis Platform (USENIX LISA 2015)
https://www.usenix.org/conference/lisa15/conference-program/presentation/takano
https://github.com/SF-TAP/
http://sf-tap.github.io/
http://ytakano.github.io/
Plank
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Security Monitoring with eBPFAlex Maestretti Using the new extended Berkley Packet Filter capabilities in Linux to the improve performance of auditing security relevant kernel events around network, file and process actions.
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OSPF wird praktisch am Beispiel des Bird Internet Routing Daemons und in Zusammenspiel mit klassischen Herstellern gezeigt.
PLNOG 13: P. Kupisiewicz, O. Pelerin: Make IOS-XE Troubleshooting Easy – Pack...
PLNOG 13: P. Kupisiewicz, O. Pelerin: Make IOS-XE Troubleshooting Easy – Pack...PROIDEA Piotr Kupisiewicz – Technical Expert in Krakow’s TAC VPN team. In IT for more than 10 years, out of which 5 years is mostly software engineering experience. Last 5 years spent mostly in networking area interested mostly in Network Security. His hobby are drums and very heavy music. CCIE Security 39762.
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Topic of Presentation: Make IOS-XE Troubleshooting Easy – Packet-Tracer
Language: English
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2. IL uses 9P to implement remote file and process access, and can run commands on remote machines using the 'rx' program over TCP/IP.
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1. A brief history of context switches in systems and the costs associated with copying data between kernel and user space during system calls.
2. An overview of common Linux system calls like read() and write() that involve data copies between kernel and user spaces.
3. Details on zero-copy Linux kernel APIs like splice() and sendfile() that can move data between file descriptors without copying to/from kernel space, improving performance.
4. Benchmark results showing a zero-copy file upload approach achieving over 3Gbps compared to 940Mbps for a normal copy-based
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DPDK KNI interface
- 1. DPDK KNI interface Quick overview
- 2. High Level Architecture User space Kernel space NIC App DPDK Ring buffers KNI driver RX/TX queues TCP/IP stack
- 3. Kernel space Data RX path design TCP/IP stack User space App DPDK lib FIFO Thread Thread N
- 4. Data RX path implementation Kernel space netif_rx(skb) TCP/IP stack kni_fifo_put() Kernel module FIFO DPDK libSocket kni_net_rx kni_fifo_get dev_alloc_skb rte_kni_tx_burst()
- 5. Kernel space Data TX path TCP/IP stack User space App DPDK lib FIFO
- 6. Data TX path implementation Kernel space kni_net_tx() TCP/IP stack kni_fifo_get() Kernel module memcpy (FIFO, SKB) kni_fifo_put dev_kfree_skb FIFO DPDK libSocket rte_kni_rx_burst()
- 7. Kernel space Sample application in a loopback mode User space FIFO 2 NIC port1 port2 Core2Core1 FIFO 1 Thread
- 8. Sample application in a standard mode Kernel space User space FIFO 2 NIC port1 port2 Core2Core1 FIFO 1 vEth1vEth0 Thread ipstack
- 9. References Building the Development Kit Binary DPDK Programmer’s Guide - Kernel NIC Interface Kernel NIC Interface Sample Application Getting Started Guide for Linux DPDK quick start Huge pages
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