Why not remove polling(4) from 7.0?

Abdullah Ibn Hamad Al-Marri almarrie at gmail.com
Thu Jun 7 09:36:21 UTC 2007

On 6/7/07, Andrew Thompson <thompsa at freebsd.org> wrote:
> On Thu, Jun 07, 2007 at 12:10:31PM +0300, Abdullah Ibn Hamad Al-Marri wrote:
> > Hello Guys,
> >
> > Almost all cases polling(4) adds additional latency.
> > There are some cases that polling(4) helps a little but most cases it
> > wouldn't.
> >
> > So why not remove it or switch to adaptive polling as em(4) instead of
> > resorting to polling?
> Are you just talking about em(4) or removing polling for all drivers? It
> is helpful in some cases, for example I run FreeBSD on a Nortel
> contivity 1010 box where interrupts do not work on the fxp interface and
> yet its quite usable with polling mode.
> Its not enabled by default so its up to the user if they want to make
> use of it.
> cheers,
> Andrew

I mean can't we use better handeling for nics which is better than
current polling(4)?


-Abdullah Ibn Hamad Al-Marri
Arab Portal

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