Re: [RFC] setting up throughput threshold indications to userspace

[Luciano Coelho <luciano.coelho@nokia.com>]

On Mon, 2010-08-16 at 16:26 +0200, ext Changli Gao wrote:
> On Mon, Aug 16, 2010 at 9:40 PM, Luciano Coelho
> <luciano.coelho@nokia.com> wrote:
> > Does anyone have an idea on how I could solve this problem?
> >
> > I have been considering using the IDLETIMER target and activate it when
> > the throughput goes to HIGH.  Then if this timer expires, it would
> > inform the userspace that now there's no data going through.  But this
> > sounds very artificial to me and will add one more dependency on the
> > userspace, since the IDLETIMER is using sysfs to inform userspace,
> > instead of netlink.
> >
> 
> Read the code of IDLETIMER again, and I notice that IDLETIMER will
> wake up all the sleepers on the corresponding sysfs files. So no
> polling is needed, what you need do is watching another files for
> read. You can use select/poll/epoll. It should be no very difficult.

Yes, I know.  I have reworked the IDLETIMER for upstream inclusion, so I
should know this after all. ;) It was just the idea of having the daemon
have one more interface with the kernel that seemed a bit ugly...


-- 
Cheers,
Luca.