On Fri, Aug 10, 2012 at 01:38:33PM -0400, Ed Maste wrote: > > We've had good improvements in a similar issue in dpif-linux by > > switching to use "epoll". Can kqueue under FreeBSD do something > > similar? > > Yes, epoll and kqueue basically provide the same functionality. What > do you think about incorporating something like libevent to abstract > that?
It looks like libevent is oriented around the idea of writing your program as a collection of event handler callbacks, with a fixed main loop provided by libevent. It's possible that this leads to faster programs in practice (certainly in theory, I agree), but it's a major change from how OVS is structured today. In addition, my own experience is that programs structured as callbacks are harder to understand, maintain, and improve than similar programs structured in a more linear manner. (This is based on only a quick skim of the libevent manual, so I may have missed some other way that libevent can be used.) I'd rather address performance problems in a more evolutionary way. If some serious performance problem cannot be addressed that way, then that's different, but I don't think we've encountered such a problem yet. Thanks, Ben. _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
