Author: Alfredo Cardigliano

Over the past couple of weeks we have further improved the DNA performance, and thus we have decided to test its performance. In order to do reproducible measurements we decided to adopt the benchmark specified in RFC 2544. You can find the complete test details and results on this document: DNA_ip_forward_RFC2544. As you can read we used a low-end single-CPU Supermicro server X9SCM, Linux Fedora Core 15, and a Spirent SRC-2002HS 10 Gbit traffic generator. On a nutshell DNA has not lost a single packet, even with 64 bytes (60 bytes …

For years networking companies have used the buzzword zero-copy to qualify those hardware/software solutions that allow applications to play with packets without the need to copy them at all. Zero-copy needs DMA (Direct Memory Access) for operating so that applications do not get a (shallow) copy of packets but they actually get the pointer to the packet. As you probably know, PF_RING DNA allows applications to access packets in zero-copy so that in the pfring_recv() call you get a pointer to the packet just receive. Whereas in traditional PF_RING you always get …