diff options
author | Eric Dumazet <edumazet@google.com> | 2016-11-16 09:10:42 -0800 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2016-11-18 10:44:31 -0500 |
commit | e68b6e50fa359cc5aad4d2f8ac2bdbc1a8f4fd59 (patch) | |
tree | 7a0dbf2b9d469d6ea24f7aef3e53f03c18d62158 /crypto | |
parent | fcd2b0da730fab9b125296e859716c9652614721 (diff) | |
download | linux-e68b6e50fa359cc5aad4d2f8ac2bdbc1a8f4fd59.tar.bz2 |
udp: enable busy polling for all sockets
UDP busy polling is restricted to connected UDP sockets.
This is because sk_busy_loop() only takes care of one NAPI context.
There are cases where it could be extended.
1) Some hosts receive traffic on a single NIC, with one RX queue.
2) Some applications use SO_REUSEPORT and associated BPF filter
to split the incoming traffic on one UDP socket per RX
queue/thread/cpu
3) Some UDP sockets are used to send/receive traffic for one flow, but
they do not bother with connect()
This patch records the napi_id of first received skb, giving more
reach to busy polling.
Tested:
lpaa23:~# echo 70 >/proc/sys/net/core/busy_read
lpaa24:~# echo 70 >/proc/sys/net/core/busy_read
lpaa23:~# for f in `seq 1 10`; do ./super_netperf 1 -H lpaa24 -t UDP_RR -l 5; done
Before patch :
27867 28870 37324 41060 41215
36764 36838 44455 41282 43843
After patch :
73920 73213 70147 74845 71697
68315 68028 75219 70082 73707
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'crypto')
0 files changed, 0 insertions, 0 deletions