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4 By default memcached assigns connections to worker threads in a round-robin
10 in linux kernels 4.12 or higher. This socket option returns a system level
11 unique ID called NAPI ID that is associated with a RX queue on which the
16 with a NIC HW receive queue and services all the connection requests
17 received on a specific RX queue. This mapping between a memcached thread
18 and a HW NIC queue streamlines the flow of data from the NIC to the
23 This feature is enabled via a new command line parameter -N <num> or
25 hardware RX queues through which requests associated with a connection are
31 During a normal run, each worker thread gets associated with a napi_id and
32 this will establish a 1:1 mapping between the thread and queues. If a new
35 number of RX queues OR if the NIC driver goes through a reload), a stats
39 If -N option is used, but the connection requests are received from a
41 is tracked via a stats counter called 'round_robin_fallback'.