#NETMAP STACK DRIVERS#

In the rest of this (long) manual page we document various aspectsĪrchitecture, features and usage.

A list of such devices is at the end of this document. Performance, netmap requires native support inĭevice drivers. Switch are implemented by a single kernel module, which also emulates Through ioctl(2), synchronization and blocking I/O throughĪ file descriptor and standard OS mechanisms such as Providing high speed packet I/O between processes, virtual machines, NICs Netmap monitors can be created dynamically, Netmap mode and send and receive raw packets through Userspace clients can dynamically switch NICs into

#NETMAP STACK DRIVERS#

Mode, which uses unmodified device drivers and is 3-5 times faster than Netmap support can still use the API in emulated Gbit/s NICs 35-40 Mpps on 40 Gbit/s NICs (limited by the hardware) aboutĢ0 Mpps per core for VALE ports and over 100 Mpps for Packet I/O using netmap on supported NICs reachesġ4.88 million packets per second (Mpps) with much less than one core on 10 With suitably fast hardware (NICs, PCIe buses, CPUs), Interchangeably with the same API, and are at least one order of magnitudeįaster than standard OS mechanisms (sockets, bpf, tun/tap interfaces, native Switch/dataplane netmap pipes a shared memory packet transport channel netmap monitors a mechanism similar to bpf(4) to capture traffic Physical NIC ports to access individual queues of network interfaces host ports to inject packets into the host stack VALE ports implementing a very fast and modular in-kernel software Supports a variety of netmap ports, including On FreeBSD Linux and some versions of Windows, and Packet I/O for userspace and kernel clients, and for Virtual Machines.

A shared memory packet transport channel SYNOPSIS ¶ device netmap DESCRIPTION ¶ netmap is a framework for extremely fast and efficient

Netmap stack