Il 26/09/2014 03:23, Fam Zheng ha scritto:
> > Also, as an extra optimization perhaps you can make a second list with
> > iohandlers that were modified or have a read_poll handler, and only call
> > iohandler_get_events on that one.
>
> Sounds good, but I need to benchmark it to tell :)
>
> There
On Thu, 09/25 21:45, Paolo Bonzini wrote:
> Il 25/09/2014 19:21, Fam Zheng ha scritto:
> > +while (true) {
> > +r = epoll_pwait(s->epollfd.fd, events, MAX_EVENTS, 0, &origmask);
>
> You can save a syscall by doing this just once. You would just get a
> readable epoll file descriptor o
Il 25/09/2014 19:21, Fam Zheng ha scritto:
> +while (true) {
> +r = epoll_pwait(s->epollfd.fd, events, MAX_EVENTS, 0, &origmask);
You can save a syscall by doing this just once. You would just get a
readable epoll file descriptor on the next main loop iteration. Also,
origmask is an
The Linux-specific syscall epoll(7) has a constant complexity, whereas
ppoll/g_poll is linear complexity, depending on the number of fds.
The event loop is more efficient with epoll, because we only need to
poll on few fds now.
Sometimes EPOLL_CTL_ADD returns -1 with errno = EPERM, when the targe
