On Thu, Jun 25, 2015 at 09:14:53AM +0000, Vass, Sandor (Nokia - HU/Budapest) wrote: > According to my understanding each packet should go > through BR as fast as possible, but it seems that the rte_eth_rx_burst > retrieves packets only when there are at least 2 packets on the RX queue of > the NIC. At least most of the times as there are cases (rarely - according > to my console log) when it can retrieve 1 packet also and sometimes only 3 > packets can be retrieved...
By default DPDK is optimized for throughput not latency. Try a test with heavier traffic. There is also some work going on now for DPDK interrupt-driven mode, which will work more like traditional Ethernet drivers instead of polling mode Ethernet drivers. Though I'm not an expert on it, there is also a series of ways to optimize for latency, which hopefully some others could discuss... or maybe search the archives / web site / Intel tuning documentation. Matthew.
