This is more than 20 times faster than conventional APIs. In our prototype, a single core running at 900 MHz can send or receive 14.88 Mpps (the peak packet rate on 10 Gbit/s links). Netmap has been implemented in FreeBSD and Linux for several 1 and 10 Gbit/s network adapters. The novelty in our proposal is not only that we exceed the performance of most of previous work, but also that we provide an architecture that is tightly integrated with existing operating system primitives, not tied to specific hardware, and easy to use and maintain. Separately, some of these techniques have been used in the past. In building netmap, we identified and successfully reduced or removed three main packet processing costs: per-packet dynamic memory allocations, removed by preallocating resources system call overheads, amortized over large batches and memory copies, eliminated by sharing buffers and metadata between kernel and userspace, while still protecting access to device registers and other kernel memory areas. In this paper we present netmap, a novel framework that enables commodity operating systems to handle the millions of packets per seconds traversing 1.10 Gbit/s links, without requiring custom hardware or changes to applications. Many applications (routers, traffic monitors, firewalls, etc.) need to send and receive packets at line rate even on very fast links.
Netmap: a novel framework for fast packet I/O USENIX Annual Technical Conf.Although in the case of pfSense the bottleneck is the pf packet filter, I thought some of you might find this upcoming USENIX 2012 paper interesting. netmap follows a simple data model, supports multi-queue. use RINA as a network virtualization framework to support applications in the cloud. netmap is an efficient framework for high speed packet I/O, implemented as a kernel module for FreeBSD.
#Netmap framework software
6 Niccolini, L., Iannaccone, G., Ratnasamy, S., Chandarshekar, J., Rizzo, L.: ‘ Building a power-proportional software router’. 2.3 Netmap: a Software framework for the implementation of high.al.,: ‘ Power consumption in telecommunication networks: overview and reduction strategies’, Commun. 5 Vereecken, W., Van Heddeghem, M., Deruyck, M.4 Chiaraviglio, L., Mellia, M., Neri, F.: ‘ Reducing power consumption in backbone networks’.3 Kohler, E., Morris, R., Chen, B., Jannotti, J., Kaashoek, M.F.: ‘ The click modular router’, ACM Trans.USENIX Annual Technical Conf., Boston, June 2012
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