Eric Dumazet 2c8c56e15d net: introduce SO_INCOMING_CPU ... Alternative to RPS/RFS is to use hardware support for multiple queues. Then split a set of million of sockets into worker threads, each one using epoll() to manage events on its own socket pool. Ideally, we want one thread per RX/TX queue/cpu, but we have no way to know after accept() or connect() on which queue/cpu a socket is managed. We normally use one cpu per RX queue (IRQ smp_affinity being properly set), so remembering on socket structure which cpu delivered last packet is enough to solve the problem. After accept(), connect(), or even file descriptor passing around processes, applications can use : int cpu; socklen_t len = sizeof(cpu); getsockopt(fd, SOL_SOCKET, SO_INCOMING_CPU, &cpu, &len); And use this information to put the socket into the right silo for optimal performance, as all networking stack should run on the appropriate cpu, without need to send IPI (RPS/RFS). Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-11-11 13:00:06 -05:00
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arch-v10	sched, cleanup, treewide: Remove set_current_state(TASK_RUNNING) after schedule()	2014-09-19 12:35:17 +02:00
arch-v32	sched, cleanup, treewide: Remove set_current_state(TASK_RUNNING) after schedule()	2014-09-19 12:35:17 +02:00
boot
configs
include	net: introduce SO_INCOMING_CPU	2014-11-11 13:00:06 -05:00
kernel
mm
Kconfig
Kconfig.debug
Makefile