PFQ

PFQ is a functional framework designed for the Linux operating system built for efficient packets capture/transmission (10G, 40G and beyond), in-kernel functional processing, kernel-bypass and packets steering across groups of sockets/end-points.

It is highly optimized for multi-core architecture, as well as for network devices equipped with multiple hardware queues. Compliant with any NIC, it provides a script that generates accelerated network device drivers starting from the source code.

PFQ enables the development of high-performance network applications, and it is shipped with a custom version of libpcap that accelerate and parallelize legacy applications. Besides, a pure functional language designed for early stages in-kernel packet processing is included: pfq-lang.

Pfq-Lang is inspired by Haskell and is intended to define applications that run on top of network device drivers. Through pfq-lang it is possible to build efficient bridges, port mirrors, simple firewalls, network balancers and so forth.

The framework includes the source code of the PFQ kernel module, user-space libraries for C, C++11-14, Haskell language, an accelerated pcap library, an implementation of pfq-lang as eDSL for C++/Haskell, an experimental pfq-lang compiler and a set of diagnostic tools.

Features

• Data-path with full lock-free architecture.
• Preallocated pools of socket buffers.
• Compliant with a plethora of network devices drivers.
• Rx and Tx line-rate on 10-Gbit links (14,8 Mpps), tested with Intel ixgbe vanilla drivers.
• Transparent support of kernel threads for asynchronous packets transmission.
• Transmission with active timestamping.
• Groups of sockets which enable concurrent monitoring of multiple multi-threaded applications.
• Per-group packet steering through randomized hashing or deterministic classification.
• Per-group Berkeley and VLAN filters.
• User-space libraries for C, C++11-14 and Haskell language.
• Functional engine for in-kernel packet processing with pfq-lang.
• pfq-lang eDLS for C++11-14 and Haskell language.
• pfq-lang compiler used to parse and compile pfq-lang programs.
• Accelerated pcap library for legacy applications (line-speed tested with captop).
• I/O user<->kernel memory-mapped communications allocated on top of HugePages.
• pfqd daemon used to configure and parallelize (pcap) legacy applications.
• pfq-omatic script that automatically accelerates vanilla drivers.

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