Re: [GnomeMeeting-devel-list] Re: GnomeMeeting on 2.6

[Johnny Strom <jonny strom netikka fi>]

Damien Sandras wrote:
> Actually, we can perhaps assume that the RPMs built for the next Fedora
> will be built with 2.6 if the distribution will ship with 2.6.
>
> I would expect that packagers will build with the default kernel the
> distribution is using. If people recompile their own kernel, they might
> have to recompile pwlib with P_HAS_SEMAPHORE=0. I will add a FAQ about
> that.
>
>
> Le 30/1/2004, "Craig Southeren" <craigs postincrement com> a écrit:
>
>
> > On Fri, 30 Jan 2004 11:41:03 +0100
> > "Damien Sandras" <dsandras seconix com> wrote:
> >
> >
> > > Who is using the 2.6 kernel and is ready to test the latest changes with
> > > it?
> > >
> > > Craig, given the fact that many packagers will compile on 2.4, what is
> > > your suggestion?
> > >
> > > I tried on the 2.4 kernel to force the P_HAS_SEMAPHORES to 0 and I have a
> > > bad sound quality when compiling, which I had not with P_HAS_SEMAPHORES
> > > set to 1.
> > >
> > > The problem becomes complex. Having a bad sound quality is not
> > > problematic. What was problematic on 2.6 was to have people having bad
> > > sound quality as soon as they were moving a window.
> > >
> > > What are your comments?
> >
> > As I am not a user of GnomeMeeting on 2.4 or 2.6, I cannot speak from
> > personal experience, but my feeling from the reports I have seen is that 2.4
> > works best with P_HAS_SEMAPHORES = 1, and 2.6 works best with
> > P_HAS_SEMAPHORES = 0;
> >
> > Regardless, I think it is too much to expect that any system (Windows or
> > Linux) can provide the real-time performance required for VoIP when
> > performing compute intensive tasks like compiling. It would appear that
> > 2.6 has altered the kernel scheduler in order to provide the best
> > interactive user feedback for actions like moving a window. While this
> > gives a good user experience for GUI users, it will inevitably affect
> > real-time performence for other tasks. For what it is worth, many
> > Windows users report a similar problem. Perhaps Windows and Linux are
> > not so different after all :)

Yes I think it is true what you said that with the altered scheduler
so is real-time performence hurt a bit, but there is no problems for me
as long as I don't run seti or something like that. On the other hand I 
think that the kernel developers would be intrested in our findings so
perhaps Robert Love will answer.


> > I do not know what we can do about this trade-off. Either way, users
> > will be upset and it is always impossible to keep all of the people
> > happy all of the time.
> >
> > Craig
> >
> >
> > -----------------------------------------------------------------------
> > Craig Southeren, craigs postincrement com http://www.postincrement.com
> > Post Increment - Software, Consulting and Services
> > Co-founder of the only open source H.323 project
> > Phone: +61 2 43654666   Fax: +61 2 43673140   Mobile: +61 417 231046
> > ICQ: #86852844          MSN: craig_southeren hotmail com
> > PGP Key:     http://www.postincrement.com/pgp.txt
> > Blog:        http://www.soutneren.com/blog
>
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