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| author | Sridhar Samudrala <sridhar.samudrala@intel.com> | 2020-10-27 18:15:22 -0700 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2020-10-28 07:15:43 +0100 |
| commit | e8500ecc786f5ee5854d4aa810dcf5124e8ed23f (patch) | |
| tree | 182121c72137af74ace763218c94a10557599db3 | |
| parent | f36f4f855b8898d58d20d31ef4d331c787ee7907 (diff) | |
| download | man-pages-e8500ecc786f5ee5854d4aa810dcf5124e8ed23f.tar.gz | |
socket.7: Document SO_INCOMING_NAPI_ID
Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
| -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. |