The advantage is being able to include it in the rest of a kqueue IO loop where it's doing other things.
-a On 28 May 2014 20:53, Fred Pedrisa <fredhp...@hotmail.com> wrote: > Hello, > > Yes, but kqueue support was added in recent commits as it says in the netmap > changelog, is there any advantage ? > > -----Mensagem original----- > De: owner-freebsd-curr...@freebsd.org > [mailto:owner-freebsd-curr...@freebsd.org] Em nome de Jan Bramkamp > Enviada em: quinta-feira, 29 de maio de 2014 00:30 > Para: freebsd-current@freebsd.org > Assunto: Re: KQueue vs Select (NetMap) > > > On 29.05.2014 03:04, Fred Pedrisa wrote: >> Hey Guys, >> >> >> >> How does kQueue performs over select with netmap ? > You are asking for a comparison between apples and oranges. Netmap is an API > for high performance access to the low-level features of modern NICs. It > works on batches of frames in hardware queues. > > The kqueue() and kevent() system calls are an event notification API. It is > mostly used by application dealing with a large amount of non-blocking > sockets (or other file descriptors). It reduces overhead inherent in > select() and poll() by preserving state between calls. It also supports > multiple types of events (read ready, write ready, timer expired, async i/o, > etc.). > > Afaik the netmap pseudo-device supports only select() and poll(). This is no > performance problem because every thread will only deal with a small number > of file descriptors to netmap devices. > > Netmap is designed to bypass the FreeBSD IP stack (for most frames). > Kqueue is designed to scale to many sockets per process within the FreeBSD > IP stack. > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org" > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org" _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"