Benchmarking PF_RING DNA
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 …