On Thu, 2012-04-12 at 11:05 +0200, Eric Dumazet wrote: > If static_key is not yet enabled, the fast path does a single JMP . > > When static_key is enabled, JMP destination is patched to reach the real > encap_type/encap_rcv logic, possibly adding cache misses.
Small note Simon, The jump trick is effective on x86 (and maybe some other arches) when CONFIG_JUMP_LABEL=y Else, its replaced by atomic_read(...) > 0, a cnditional jump but reading a read_mostly/shared variable, instead of a per socket field. _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
