The main advantage of DMA is the host CPU is not burdened with memory transfer and hence is available to perform other more important tasks.
Multi-core DMA is a technique that makes processing by multiple host CPU cores more efficient. For example, assume the host Intel CPU has 4 cores (up to 64 cores are supported) with each operating independently of the other 3 cores. The ANIC adapter is programmed to write data in to 4 independent host packet buffers (HPB) and each CPU core (and related application thread) is in turn programmed to process only its corresponding HPB. In this way a network security or monitoring application can take advantage of parallel processing of data thus achieving higher levels of speed and efficiency.
PF_RING is an open source, Linux kernel module for packet capture that is supported by most open source IPS/IDS solutions such as Snort, Suricata, and Bro as well as other applications such as Wireshark and Argus. PF_RING has native support for Accolade ANIC adapters which makes integration with any application that uses PF_RING seamless.