[PD] -nosleep flag not doing anything? (Ubuntu 10.4 - Pd-extended 0.42.5)

[Ingo Scherzinger]

Yes, exactly!
Oss doesn't seem to accept the -nosleep flag. When using alsa it works.
However, using oss without the -rt and -nosleep flags gives me about the
same or even slightly better performance than using alsa with these flags
active.
Looks like oss has some different internal system priorities compared to
alsa.

Anyway, thank you - it's doing something now!
Ingo


> It's posible the difference is in the choice of audio API (oss vs. alsa)
> or something like that -- "nosleep" prevents Pd from explicitly sleeping
> but sometimes transferring data to DACs blocks the process.
> 
> cheers
> Miller
> 
> On Fri, May 07, 2010 at 03:36:33PM +0100, Pedro Lopes wrote:
> > Here it works:
> > $ pd -nosleep
> > Gives one of the CPU's 100% load fulltime. No need to run in root for
this.
> > My startup alredy boots pd with -rt flag and I have the limits.conf
tuned as
> > reported on the wiki/documentation.
> >
> > The system is:
> > $ Linux 2.6.31-9-rt #152-Ubuntu SMP PREEMPT RT Thu Oct 15 05:01:14 UTC
> 2009
> > i686 GNU/Linux
> > (Ubuntu 9.10 rt)
> > (The CPU is a *AMD* Turion 64 X2 TL-60.)
> >
> > On Fri, May 7, 2010 at 8:31 AM, Ingo Scherzinger <ingo at miamiwave.com>
> wrote:
> >
> > > Well, I tried running Pd both as a normal user (with realtime rights)
and
> > > root (from the console). In either case case the gnome-system-monitor
said
> > > "sleeping" unless I went over 50% CPU usage for a moment with that
> > > particular pd patch.
> > > I'm using an AMD Athlon II X2 250 dual core with 3.0 GHz.
> > >
> > > Ingo
> > >
> > > > -----Urspr?ngliche Nachricht-----
> > > > Von: Miller Puckette [mailto:mpuckett at imusic1.ucsd.edu]
> > > > Gesendet: Freitag, 7. Mai 2010 05:31
> > > > An: Ingo Scherzinger
> > > > Cc: 'pd-list'
> > > > Betreff: Re: [PD] -nosleep flag not doing anything? (Ubuntu 10.4 -
> > > Pd-extended
> > > > 0.42.5)
> > > >
> > > > Hi Ingo,
> > > >
> > > > I've tested this on linux (although not recently) and it seemed to
work.
> > > > Naturally, you need at least a 2-processor machine, otherwise the
machine
> > > > will freeze.
> > > >
> > > > Should theoretically work on Mac too, but I don't have any
2+-processor
> > > > mac to try it on.  Probably does nothing on windows.
> > > >
> > > > cheers
> > > > Miller
> > > >
> > > > On Thu, May 06, 2010 at 08:13:43PM +0200, Ingo Scherzinger wrote:
> > > > > I just noticed that the -nosleep flag dosn't seem to do anything.
When
> > > I
> > > > > take a look at the system monitor it says about pd "sleeping"
until I
> > > do
> > > > > something. Even while doing some "light" things it keeps saying
> > > "sleeping".
> > > > > Is there any condition I have to set in the system to recognise
the
> > > > > -nosleep flag. Realtime is turned on. I had to change some audio
> > > properties
> > > > > to be able to use -rt without being root. Is there something
similar
> > > about
> > > > > "-nosleep"? Does the "-nosleep" flag actually help anything?
Especially
> > > when
> > > > > the system load gets heavy?
> > > > >
> > > > >
> > > > >
> > > > > Ingo
> > > > >
> > > >
> > > > > _______________________________________________
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> >
> >
> >
> > --
> > Pedro Lopes
> > contacto: jazz at radiozero.pt
> > website: http://web.ist.utl.pt/Pedro.Lopes
> 
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