The study of Netmap is a good introduction to these topics, common to all frameworks. When combined together, these techniques allow user-space applications to send/receive tens of millions of packets per second, saturating the NIC capacity even with short packets. They also use simple packet representation structures optimized for raw packet I/O rather than for full-fledged protocol stack. The bypass solutions overcome these limitations by pre-allocating packet buffers, mapping those buffers in the application address space and allowing applications to send and receive multiple packets using a single operation (e.g. Moreover, moving networking to userspace facilitates experimentation and improves portability. sk_buff on Linux), NIC register access and interrupts. These limitations are largely due to per-packet size-independent costs: system call, packet copy across user/kernel boundary, VFS layer overheads, dynamic (de)allocation of packet metadata (e.g.
Using a traditional socket API a single processor core is not able to send or receive more than 1-2 million packets per second (Mpps) at minimum packet size (60 bytes), despite of much faster modern NICs which support 10-100 Mpps. implementation) in terms of maximum packet rate. bypass projects (DPDK, PF RING), and comes from the performance limitations of the traditional socket API (and the associated O.S. The need for an alternative mechanism and API for network I/O has been recognized by several O.S. writing and loading an in-kernel VALE switch module.Exploiting the different kinds of Netmap ports and passthrough.Hands-on experience: writing an NFV application using the Netmap API.Introduction to the Netmap API with examples.He has been a Programme Committee Member for many conferences including ACM Sigcomm, Infocom, NGC, ICNP, Co-Next, NSDI, EuroSys, Usenix ATC reviewer for the main journals in networking edited by IEEE, ACM and Elsevier General Chair for the NGC'99 and ACM Sigcomm 2006 conferences, and Technical Program Co-Chair for the ACM Sigcomm 2009 and CoNEXT 2014 conferences.
He has received funding from several companies including Cisco, Microsoft Research, Intel Research, NetApp. Of California at Berkeley in autumn 2000, 2001, 20 Intel Research Cambridge in autumn 20 Intel Research Berkeley in autumn 2010 Google Mountain View in autumn 2012.
Rizzo has been a frequent visiting researcher at international research institutions and companies. Moreover, he is a longtime FreeBSD committer.
#Veth netmap software#
His most popular achievements include the netmap framework for fast packet I/O, the dummynet traffic shaper, and a popular erasure code used for reliable multicast and software RAID. Luigi Rizzo is associate professor at the Dipartimento di Ingegneria dell'Informazione, University of Pisa. We aim at attendees becoming able to write a simple packet processing application using the netmap API and run it on several netmap ports on bare metal or inside containers and virtual machines. The different features are then presented one by one along with their corresponding use cases and performance numbers. We introduce Netmap along with its API and example programs. The tutorial then focuses on Netmap because of its flexibility, multi-faceted capabilities and unique advantages to other frameworks, in particular for NFV use cases. For performance reasons, the frameworks typically bypass the kernel or its network stack, and provide user-space applications with a device-independent API for direct access to the physical or virtual Network Interface Card (NIC) hardware. These frameworks support packet processing applications (e.g., routers, middleboxes) that need to deal with millions of packets per seconds (e.g., 10 Gbps or higher), which are often needed in the context of Network Function Virtualization (NFV). The first part of this tutorial provides an overview and an analysis of the challenges for fast user-space network I/O frameworks such as netmap, DPDK, PF_RING. ACM SIGCOMM 2017 Tutorial (Full-Day): The Netmap framework for NFV applications Call For Participation
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