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| -rw-r--r-- | man7/socket.7 | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/man7/socket.7 b/man7/socket.7 index 850d3162fb..1f38273e9f 100644 --- a/man7/socket.7 +++ b/man7/socket.7 @@ -519,6 +519,18 @@ This provides optimal NUMA behavior and keeps CPU caches hot. .\" SO_REUSEPORT logic, selecting the socket to receive the packet, ignores .\" SO_INCOMING_CPU setting. .TP +.BR SO_INCOMING_NAPI_ID " (gettable since Linux 4.12)" +.\" getsockopt 6d4339028b350efbf87c61e6d9e113e5373545c9 +Returns a system level unique ID called NAPI ID that is associated with a RX +queue on which the last packet associated with that socket is received. +.IP +This can be used by an application to split the incoming flows among worker +threads based on the RX queue on which the packets associated with the flows +are received. It allows each worker thread to be associated with a NIC HW +receive queue and service all the connection requests received on that RX +queue. This mapping between a app thread and a HW NIC queue streamlines the +flow of data from the NIC to the application. +.TP .B SO_KEEPALIVE Enable sending of keep-alive messages on connection-oriented sockets. Expects an integer boolean flag. |